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KS7314 digital zoom introduction features device package operating temperature KS7314 80-qfp-1212 0 ~ +70 c ordering information the KS7314 offers enlarged images through the zoom effect attained by horizontal and vertical interpolation of luminance and chrominance signal input supplied from the ccd digital signal processor (ks7306). the signal input is implemented by employing a 2nd generation electronic zoom ic, which electronically enlarges the image picked up by the ccd of a camcorder. in addition, it corrects the wobble of hand-held cameras, and also provides the functions of a gyro-sensor and a mosaic mirror. 80-qfp-1212 256 discrete zoom steps zoom operation withart using field memory vertical image expansion and vertical interpolation by the control of a built-in 2h delay line zoom operation dependent upon y, r-y, b-y signal input (source format ? 4:1:1) variable zoom ratio technology applicable to horizontal and vertical directions (styling effect) correction of wobbling hand by the sub-pixels in vertical direction correction of wobbling hand in horizontal direction provision of special effects such as: - horizontal mirror technology - variable 16 mode mosaic block size technology (mosaic function available in eis mode) linear interpolation algorithm applied to both luminance and chroma signals in horizontal and vertical directions applicable to wide tv screen with 630,000 pixels applicable to world-wide models, of different systems like ntsc/pal, hi8/normal, and dvc electronic zoom ratio expansion available upto four times (4 ) the maximum, and more in horizontal zooming operable normally at 3.3v, and 5.0 v
KS7314 digital zoom pin configuration biston error test0 test2 test3 pblk rst vdd2 vblk hd lhld gnd pck vdd1 vdd1 done gnd test1 fld vd 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 gnd nand-out vdd1 multo dzscsn dzsi dzsck gnd gnd dzcblko dzbfo dzcsynco dzbfi dzcsynci gnd gnd vdd1 gnd dzcblki gnd fwen gnd gsck gscsn gnd uvck gnd ci0 ci1 ci3 vdd1 co0 co1 co2 co3 vdd2 gsi vdd1 ci2 KS7314 pal yi0 yi1 yi2 gnd yi3 yi4 yi5 vdd1 yi6 yi7 yo0 yo1 gnd yo2 yo3 yo6 yo4 vdd2 yo5 yo7
KS7314 digital zoom block diagram micom interface pre- processor pre- processor test enable yi [ 7:0 ] syst. micom ci [ 3:0 ] 1h dline 1h dline test block timing generator gyro micom luminance signal vertical interpolation block 1h dline x a x b luminance signal horizontal interpolation block x a x b s/h post- processor yo[ 7:0 ] memory controller vertical a , b generation horizontal a , b generation system delay adjust bfi cblki csynci bfo cblko csynco x b x a x a x b 1h dline s/h post- processor co [3:0 ] chroma signal vertical interpolation block chroma signal horizontal interpolation block 8 8 control signal (pck,uvck,hd,vd,vblk,lhld,fwen,pblk,rst) luminance signal horizontal expansion chroma signal horizontal expansion
KS7314 digital zoom pin description no symbol i/o from / to description 1 yi0 i dcp / luminance signal input 2 yi1 i dcp / luminance signal input 3 yi2 i dcp / luminance signal input 4 gnd g - ground 5 yi3 i dcp/ luminance signal input 6 yi4 i dcp / luminance signal input 7 yi5 i dcp / luminance signal input 8 vdd1 p - power(3.3 v) 9 yi6 i dcp/ luminance signal input 10 yi7 i dcp / luminance signal input 11 yo0 o dcp / luminance signal output 12 yo1 o dcp / luminance signal output 13 gnd g - ground 14 yo2 o dcp/ luminance signal output 15 yo3 o dcp / luminance signal output 16 yo4 o dcp / luminance signal output 17 vdd2 p - power(5.0 v) 18 yo5 o dcp/ luminance signal output 19 yo6 o dcp / luminance signal output 20 yo7 o dcp / luminance signal output 21 gnd g - ground 22 gnd g - ground 23 gnd g - ground 24 dzcsync1 i dcp/ csync input for delay adjust 25 dzbfi i dcp / burst flag input for delay adjust 26 dzcblki i dcp / cblk input for delay adjust 27 gnd g - ground 28 vdd1 p - power(3.3 v) 29 dzcsynco o / dcp delayed csync output 30 dzbfo o / dcp delayed burst flag output 31 dzcblko o / dcp delayed cblk output
KS7314 digital zoom (continued) no symbol i/o from / to description 32 gnd g - ground 33 gnd g - ground 34 dzsck i s.micom / system micom data sampling clock 35 dzsi i s.micom / system micom data serial input 36 dzscsn i s.micom / system micom data enable signal input 37 mul-to o - multiplier test output 38 vdd1 p - power(3.3 v) 39 nand-out o - nand tree test output 40 gnd g - ground 41 test3 i - test signal input 42 test2 i - test signal input 43 test1 i - test signal input 44 test0 i - test signal input 45 gnd g - ground 46 done o - memory bist end signal output 47 error o - memory bist error signal input 48 biston i - memory bist enable signal input 49 vdd1 p - power(3.3 v) 50 vdd1 p - power(3.3 v) 51 pck i tgm / system clock 52 gnd g - ground 53 lhld i l linememory hold signal input 54 hd i tgm / horizontal drive pulse input 55 vblk i tgm / vertical blank signal input 56 vd i tgm / vertical drive pulse input 57 fld i tgm / field selection signal input 58 vdd2 p - power(5.0 v) 59 rst i system / system reset signal input 60 pblk i tgm / pre-blank signal input for linememory reset 61 pal i - ntsc/pal signal input (pal : high) 62 fwen i tgm / linememory hold signal 1
KS7314 digital zoom (continued) no symbol i/o from / to description 63 gnd g - ground 64 gsck i g.micom / gyro micom data sampling clock 65 gsi i g.micom / gyro micom data serial input 66 gscsn i g.micom / gyro micom data enable signal input 67 vdd1 p - power(3.3 v) 68 gnd g - ground 69 uvck i dcp / clock input for (r.y)/(b-y) judgement 70 gnd g - ground 71 ci0 i dcp / chroma signal input 72 ci1 i dcp / chroma signal input 73 ci2 i dcp / chroma signal input 74 ci3 i dcp / chroma signal input 75 vdd1 p - power(3.3 v) 76 co0 o dcp / chroma signal output 77 co1 o dcp / chroma signal output 78 co2 o dcp / chroma signal output 79 co3 o dcp / chroma signal output 80 vdd2 p - power(5.0 v)
KS7314 digital zoom functions of blocks function block function performed luminance horizontal interpolation interpolates linearly of luminance signal in horizontal direction luminance vertical interpolation interpolates linearly of luminance signal in vertical direction chroma horizontal interpolation interpolates linearly of chroma signal in horizontal direction chroma vertical interpolation interpolates linearly of chroma signal in vertical direction horizontal coefficient generation generates the horizontal interpolation coefficient for luminance and chroma signals vertical coefficient generation generates even/odd field vertical interpolation coefficient for luminance and chroma signals line memory controller generates read/write address for 1h delay line for horizontal image expansion and 1h delay line for vertical interpolation timing generation generates time signals for controls micom interface decodes zoom/dvc/special effect mode gyro micom interface decodes wobbling hand correction level signal
KS7314 digital zoom absolute maximum ratings electrical characteristics dc (t opr = 0 ~ +70 c) * vdd1 : pin no 8, 28, 38, 49, 50, 67, 75 vdd2 : pin no 17, 58, 80 characteristics symbol value unit supply voltage v dd -0.3 ~ +7.0 v input voltage v i -0.3 ~ vdd+0.3 v output voltage v o -0.3 ~ vdd+0.3 v storage temperature t stg -40 ~ +125 c operating temperature t opr 0 ~ +70 c latch-up current i lu 100 ma characteristics symbol min typ max unit operating voltage for internal v dd1 3.1 3.3 3.5 v operating voltage for i/o cell v dd2 4.75 5.0 5.25 v ground v ss 0 0 0 v input high voltage v ih 0.7v dd2 - - v input low voltage v il - 0.3v dd2 v operating current i dd - - 100 ma standby current i ds - - 1 ma output high voltage (ioh = -1ma) v oh 2.4 - - v output low voltage (iol = 1ma) v ol - - 0.4 v input high leakage current(v i = 0 ~ v dd ) i ih -10 - +10 m a input low leakage current(v i = 0 ~ v dd ) i il -10 - +10 m a
KS7314 digital zoom ac (t opr = 0 ~ +70 c, ts = 100 ns) characteristics symbol min typ max unit yi data setup time t yst 25 - - yi data hold time t yht 10 - - ci data setup time t cst 25 - - ns ci data hold time t cht 10 - - uvck clock delay time t d 10 - 35 t s t d t yst t yht t cst 1 cht b-y (m) b-y (l) r-y (l) r-y (m) pck uvck yi<7:0> ci<3:0>
KS7314 digital zoom micom interface 1. nec system micom interface ( m pd78014) serial port timing characteristics (f clk = 12 mh z ) characteristics symbol min typ max unit serial port clock cycle time t sck 1300 - - serial port clock high, low width t wh , t wl 556 - - input data setup to clock rising edge t s 30 - - ns input data hold after clock rising edge t h 30 - - scsn setup time t scn 30 scsn hold time t shd 30 t wl t wh t sck t scn scsn t shd t s t h d7 d6 sck si
KS7314 digital zoom 2.gyro micom interface(cxd81120) characteristics symbol min typ max unit serial port clock cycle time t sck 2000 - - input data setup to clock rising edge t s 30 - - input data hold after clock rising edge t 30 - - serial port clock high, low width t wh , t wl 700 - - ns scsn setup time t scn 30 - - scsn hold time t shd 30 - - t wl t wh t sck t scn scsn t shd t s t h sck si
KS7314 digital zoom system configuration and operation (implementation of 2nd generation electronic zoom) 1. system block configuration i ( eis+d.zoom + spec. effect ) fig.1 2nd generation eis/electronic zoom applied camcorder camera system the 2nd generation electronic zoom which enlarges images without using field memory, performs the electronic zooming process by means of image extension first, and then by signal interpolation. in the 1st process of image zooming, the vertical zooming is accomplished by the control of image data read-out pulse from ccd. the generation of ccd read-out pulse is accomplished at tgm(ks7213) with the input of electronic zooming ratio data supplied from the system micom. the image being vertically extended for the electronic zooming is fed to dcp(ks7306) in its form of an image extended only vertically. at the dcp(ks7306), image interpolation for the vertically zoomed image by nni is first performed according to the line hold signal. this is the process of removing blank data existing in between lines of a vertically zoomed image. the image data is first interpolated at the fed to the electronic zoom (KS7314). the image input separated in luminance and chroma signals snaped in a 4:1:1 formation from the fed to the dcp is then processed for horizontal extension within the electronic zoom for the horizontal zooming. horizontal extension is accomplished through the address control of line memory self-contained in the electronic zoom processor. the image data of the horizontally extended is interpolated in vertical and horizontal directions by the inner-interpolation function of the electronic zoom processor. the discussion so far relates the functional process of the electronic zoom. the hand wobble correction is accomplished in the following manner. the hand wobble data of the camcorder detected by the gyro-sensor and the gyro-micom are fed to tgm for vertical compensation by lines. the vertical compensation is performed by the control of ccd read out pulse supplied by tgm. the image data compensated for vertical agitation by lines is then fed to the electronic zoom througn dcp to perform horizontal correction of hand wobble through the use of the line memories for horizontal extension within the electronic zoom. in other words, the correction of horizontal hand wobble is implemented by pixels with the use of read address of the line memories. the correction of hand wobble in vertical and horizontal detailed to sub-pixels is reflected in the creation of interpolation coefficient with which the interpolation is implemented. v.drive tgm/ssg (ks7213) y/c cds /agc a/d dcp (ks7306) gyro micom d. zoom (KS7314) hi- density ccd system micom 1 2 3 4 5
KS7314 digital zoom for horizontal wobble correction, a fixed ratio of electronic zooming needs to be maintained in the electronic zoom, and for vertical wobble correction, employment of a high density ccd is required. the threshold for the correction of hand wobble is dependent upon the number of effective lines of the high density ccd and the horizontal zoom ratio of the electronic zoom. 2. system block configuration ii (electronic zoom and special effect blocks) fig. 2 camcorder camera system of electronic zoom 2nd generation application fig. 2 above illustrates a camcorder a camera system with an electronic zoom function. the difference between the above system to the camcorder camera system with electronic zoom and hand wobble correction function is that, the former does not, for the attainment of image stability, employ high density ccd intended for the vertical correction of hand wobble. the signal process system explained below and electronic zoom signal process system are identical to the one illustrated in fig.1. as for this camcorder camera system, it is important that all aspects of signal procesing must go through the electronic zoom process (KS7314) since the repetition of the KS7314 chip enable/disable occuring every time the electronic zoom turns to on/off would entail screen shift of the image. so to speak, the screen shift occurs just as much as the electronic zoom processing is delayed develops. in order to compensate for the electronic zoom system, the video data is delayed to match, the processing delay of electronic zoom, using the synchronizing signal (burst flag, cblk or csync), and is then passed to the signal processor (ks7306). the special effect is implemented in the following manner. the special effects data in serial format, supplied from the system micom, is first converted to parallel format. the mirror effect in horizontal direction and the mosaic effect in vertical direction are implemented, controlled by the read address of line memories for horizontal expansion. the read/write enable signal while the mosaic effect in horizontal direction is achieved by the conversion of sampling frequency against the fully interpolated image data. in particular, the mosaic effect can also be achieved in eis mode. ccd v.drive tgm/ssg (ks7213) y/c cds /agc a/d dcp (ks7306) system micom d. zoom (KS7314) 5 4 3 1 2
KS7314 digital zoom 3. eis / system micom interface table 1. eis micom interface table 2. system micom interface tables 1 and 2 summarize the interfacing data formats of the eis micom (gyro micom) and the system micom respectively. in the eis micom interfacing of table 1, the data for horizontal hand tremble is supplied to KS7314. the default line skip level and vertical hand tremble level are not computed by eis micom, but the line skip is determined finally by ks7213 after the operation of vertical hand tremble level data entries taken in the form of 2 , s complement. the vertical sub-pixel hand tremble level data are, however, converted to positive value before they are entered. in the system micom interfacing of table 2, the start point data of horizontal/vertical electronic zooming are computed by the following formulae and then transmitted to KS7314 and ks7213. electronic zoom start point = width(or height) * (1-(1/zoom ratio))/2 = width(or height) * (elec. zoom step)/(2*256) where width or height represent the value of effective pixels of ccd and in case the high density ccd and fcm of the eis application are used, they then represent effective line output of high density ccd and effective pixel number respectively. the figure 256 standing in above formulae explains that each of pixel is devided in 256 parts for the electronic zooming. the electronic zoom ratio data are generated in the form of electronic zoom step for the horizontal element and electronic zoom ratio inverse for the vertical element. eis micom interface to remarks level of horizontal integer digital zoom (KS7314) 2 s complement hand whole sub-pixel offset digital zoom (KS7314) 2 s complement level of vertical integer tgm (ks7213) 2 s complement hand whole sub-pixel tgm (ks7213) 2 s complement sub-pixel ofset digital zoom (KS7314) positive only system micom interface to remarks horizontal zoom integer digital zoom (KS7314) linememory read address to decide start point sub-pixel offset digital zoom (KS7314) entered into horizontal interpolation coefficient part horizontal electronic zoom digital zoom (KS7314) entered into horizontal interpolation coefficient part integer tgm (ks7213) ccd line skip to decide vertical zoom start point sub-pixel offset tgm (ks7213) digital zoom(KS7314) entered into vertical interpolation coefficient part vertical electronic zoom ratio inverse tgm (ks7213) digital zoom(KS7314) generate line hold signal vertical coefficient part
KS7314 digital zoom 4. KS7314 input video data format fig. 3 electronic zoom input video data format(4:1:1) 5. line memory reset signal (lblk) generation x y1 y2 y3 y4 y5 y6 y7 y8 y9 x rm1 rl1 bm1 bi1 rm2 ri2 bm2 bi2 rm3 uvck yi<7:0> ci<3:0> pck 36ck lblkd lblk hd pblk fig. 3 illustrates the video data format input to KS7314, fed from ks7306. the luminance and chroma d data are in the 4:1:1 format, and the chroma data is entered in sequence of (r-y) lsb, (b-y) msb, and (b-y) lsb. the uvch signal distinguishs r-y from b-y. the lblko is the signal used to reset the counter during the process of generating the read/write address of the line memory. the duration in which lbko is at high level is the effective pixel section. KS7314 generates lblk signal that is used as the counter reset signal of line memory address self- contained in the line memory address of KS7314. considering that 28ck is developed while processing the effective data of ks7306, lblk is delayed to create lblkd for use as a reset signal of the line memory counter. the chroma input of 4 formation is restructered to 8 bit signal before the application to the interpolation.
KS7314 digital zoom 6. vertical interpolation fig. 4-1 vertical interpolation circuit fig. 4-2 h delay line timing specification for vertical interpolation application 1h delay line to horizontal interpolator alpha 8 9 beta lhld addr horizontally extended video data x x 1.22ns 1.1ns 0.1ns 0.1ns 0.1ns 0.1ns 5.69ns 0.1ns address ck wen oen data_in fig. 4-1 is the vertical interpolating circuit applicable to both luminance and chroma signals. the vertical video input data for the vertical interpolator is readily processed for horizontal video extension, using the linememory at the former stage of luminance and the chroma signal horizontal extender. in the vertical interpolation block, the interpolation coefficients alpha and beta, generated by the vertical interpolating coefficient generator, are applied in the interpolation operation. fig. 4-2 dipicts 1h delay line timing specification applied to vertical interpolation. the function of read and write is performed in the method of read first and write second, in 2 cycles of the linememory clock. the ac timing above should be regarded as the minimum.
KS7314 digital zoom 7. horizontal interpolation procedure fig. 5 luminance signal horizontal interpolation circuit s / h to post processor alpha 9 8 beta ck vertically interpolated video data x x prior to the horizontal interpolation process, the video data are extended at the horizontal extension and passed to the vertical interpolation part for the vertical process and then entered into the horizontal interpolation part. the horizontal interpolation part is configured of the luminance data horizontal interpolation part and the the chroma data horizontal interpolation part. the chroma data and are entered r-y and b-y components alternatively, so that the data are interpolated separately by the components before they are put to liner interpolation process.
KS7314 digital zoom 8. generation of interpolating coefficient 1) generation of horizontal interpolating coefficient table 3. zoom ratio data(horizontal) supplied by the system micom table 4. relation of eis micom output decimals of horizontal hand tremble level to interpolation coefficient data (zrd) supplied by micom interpol. coeff.( a ) interpol. coeff.( b ) zooming ratio(256/(256-zrd)) zoom step. 00000000 1 0 x1 0 00000001 255/256 1/256 256/255 1 : : : : : 10000000 128/256 128/256 x2 128 : : : : : 11000000 64/256 192/256 x4 192 motion vector decimal interpolation coeff. ( a ) interpolation coeff. ( b ) 0.75 (11000000) 192/256 64/256 0.5 (10000000) 128/256 128/256 0.25 (01000000) 64/256 192/256 0 (00000000) 1 0 table 3 illustrates the system micom transmission data(zrd) for generating the horizontal interpolating coefficient for electronic zooming. table 4 illustrates the eis micom transmission data for generating the interpolating coefficient for decimal level correction of hand trembles.
KS7314 digital zoom 2) generation of vertical interpolation coefficient table 5. zoom ratio inverse data(vertical) transmitted by system micom table 6. an example of generating vertical interpolating coefficient based on zoom ratio data micom supplied data(zmiv) interpolating coefficient( a ) interpolating coefficient( b ) zoom ratio (256/zmiv) zoom step 00000000 0 1 x1 0 11111111 255/256 1/256 256/255 1 : : : : : 10000000 128/256 128/256 x2 128 : : : : : 01000000 64/256 192/256 x4 192 zoom ratio data(zmiv) interpolating coefficient( a ) interpolating coefficient( b ) 0 0, 0, 0, 0, 0, . . . 1, 1, 1, 1, 1, . . . 255 0, 255/256, 254/256, 253/256, 252/256, . . 1, 1/256, 2/256, 3/256, 4/256, . . 254 0, 254/256, 252/256, 250/256, 248/256,. . 1, 2/256, 4/256, 6/256, 8/256, . . : : : 128 0, 128/256, 0, 128/256, 0, . . . 1, 128/256, 1, 128/256, 1, . . : : : 64 0, 64/256, 128/256, 192/256, 0, . . 1, 192/256, 128/256, 64/256, 1, . . the data entered to the vertical interpolating coefficient generation part consist of zoom ratio inverse data, and vertical sub-pixel hand tremble data, supplied from the eis micom. the vertical interpolating coefficient is generated, based on the above data. the vertical sub-pixel hand tremble data supplied by the eis micom would look identical to that shown in table 4 above. the vertical interpolating coefficient applies equally to luminance and chroma. the vertical interpolating coefficients a and b responding to specific zoom ratio are tabulated in table 6 above. upon the entry of zoom ratio data, interpolation coefficient a , interpolation coefficient b are generated. the interpolation coefficients shown on table 3 are generated continuously, and then the zooming process is implemented after a separate operation of the coefficient and the pixel data, entered in the zoom processor.
KS7314 digital zoom 9. special effect i (horizontal mirror effect) fig. 6 mirror read address timing diagram 10. special effect ii (style) y1 y2 y3 y4 y5 y6 y7 y8 y8 y7 y6 y5 y4 mirror point r1 b1 r2 b2 r2 b2 r1 pck uvck luminance chrominance the function allows image expansion in horizontal or vertical direction, independently from each other. the supply of zoom ratio data from the micom, separated in horizontal and vertical directions, enables to stage such effect of an image. in case the zoom ratio data from the micom specify 2 power in horizontal, and single power in vertical direction, the zoom processor needs to perform interpolation only in horizontal direction. in this way, an image of different magnification, either in the horizontal or the vertical, independently from each other, is obtainable. the application of zoom ratio data, separated in directions supplied by the micom to the circuit of the zoom processor where the horizontal and vertical interpolating coefficients are gernerated, can implement the special effect function easily. horizontal mirror effect is termed after the fact that the function offers symmetrical images siding by the upright axis in the center of screen, just like a mirror reflection. the effect is achieved by the control of the read address of 1h delay line, used in the horizontal expansion of luminance and hue signals inside the zoom processor. the function is implemented by means of counting the number of effective pixels in the image input to KS7314, assigning half the count as the horizontal mirror point, and then performing control up/down of the read address counter when read address is generated.
KS7314 digital zoom 11. special effect iii (mosaic) pck uvck r1 b1 r2 b2 r2 r1 b1 y1 y9 luminance chrominance the mosaic function offers the user an ability to form a blocked area of a set size on screen, to display the image with an obscure outline. the room processor supports a mosic effect implemented in block sizes of 4 4, 8 8, 12 12, 16 16, . . . 60 60, 64 64, making 16 sizes altogether. to obtain the mosaic effect, first decide on the mosaic size and then fill out the block with uniform pixel value for every pixel in the block. the process should be performed according to luminance and chroma signals separately. as for the process of luminance signal, in order to maintain uniform brightness of pixels, take the value of the uppermost-left pixel of the block as the representative value, and then replace all the rest of the pixel values in the block. for the process of replacing all the pixel values with the representative value, first adapt the system clock to conform to the selected mosaic mode by means of demultiplying the clock by 4, 8, . . . 64, and use this demultiplied clock as the mosaic clock. the case of chroma signal is fairly complicated. since the chroma signal alternates r-y to b-y by the clock, the luminance method can not be directly applied and that the adjustment of the mosaic clock is necessary to maintain r-y and b-y chroma components. the replacement of a vertical pixel value with the representative value can be achieved by the read/write enable control of 1h delay line, applied in horizontal expansion. in the vertical signal process for a mosaic, attention is invited to the fact that the standard tv screen comes separated in even and odd fields by interlaced scanning. signal process only in a half of that required in the horizontal process would be sufficient. for example, in an 8 8 mosaic mode, only 4 lines of mosaic video process vertical will display a square mosaic block on screen. in the same manner, the mosaic process of luminance and chroma signals in vertical direction can be performed. in case of a vertical mosaic, the system delay in vertical direction may vary, depending on the type of camcorder usage. that user may, in case of a vertical mosaic operation, take the dummy data of black level appearing on the top side of the screen for the initial mosaic start line, and a symptom, in which the black level on the top side would grow as the mosaic block size grows, may develop. the system micom is, therefore, designed to be capable of controlling the vertical mosaic start line in order to avoid such symptoms. the mosaic function is enabled in eis electronic image stabilizer mode of operation. fig. 7 horizontal mosaic timing diagram (8 8 mosaic)
KS7314 digital zoom vertical mosaic initial line of execution fig. 8 vertical mosaic timing diagram (8 8 mosaic) vblk 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11 12 1 1 1 1 5 5 5 5 9 9 hd ccd output KS7314 input mosaic output 12. digital video interface KS7314 has a built-in dvc interface for application to digital video camcorders. in other words, the luminance and chroma signal output of KS7314 can be used as an input to dvc encorder, without the need of transmitting the output to ks7306, which is the signal processor. for this purpose, it is able to adjust chroma signal timing in dvc mode against luminance signal and synchronization signal 8ck by the system clock unit. KS7314 takes the input of the dvc mode recognition signal and the delay adjustment value for the chroma signal from the micom. 13. delay adjust the processing delay developed in the process of electronic zooming should be compensated, and the compensation can be achieved by delaying the signals related to active display of image, equal to the electronic zoom processing delay. namely, the input of signals cblk, csync, and cbf from the digital camera processor(dcp) is taken to process and then entered back to dcp. the vertical delay is not adjusted particulary in the electronic zoom process, now that pblk is used in dcp as the line memory reset. the signal gets readily processed before the image effective pixel process and thus vertical delay is not considered. the electronic zoom processing delay lasts 20 system clock in total and it develops to 28 system clock for KS7314 in dvc mode.
KS7314 digital zoom register table 1. micom command register note ) system micom interface timing reg. name register description command (header) command register (header) notes) vadj : vblk delay adjust hadj : lblk dealy adjust possible synchronous realization of mosaic and eis impossible synchronous realization of mirror and d.zoom scsn 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 word 8(1 byte) control data(9 byte) command(1 byte) sclk si dz eis efct vadj hadj dvc 0 7 dz mode eis mode efct mode 0 dz off 0 eis off 0 effect off 1 d.zoom 1 eis on 1 effecet on mode) vadj mode hadj mode 0 0 2 h delay 0 0 32 ck delay 0 1 3 h delay 0 1 36 ck delay 1 0 4 h delay 1 0 40 ck delay 1 1 5 h delay 1 1 44 ck delay dvc mode 0 normal zoom 1 zoom for dvc
KS7314 digital zoom 2. system micom register table 1) zoom register table reg. name register description word 0 word 1 hzoom (zrd) vzoom (zmiv) horizontal zoom step. ( 0 ~ 192 : x 1 ~ x 4 ) vertical zoom step. (256 ~ 64 : x 1 ~ x 4 ) word 2 word 3 hsp horizontal start read address.(16 bit) 15 9 8 0 word 4 hsub horizontal zoom start sub pixel. ( 0 ~ 255 ) word 5 word 6 voffo voffe vertical zoom start sub pixel odd field (0~255) vertical zoom start sub pixel even field (0~255) word 7 dvc_dly delay adjust(2 s complement) for dvc 7 0 0 0 ~ 511 sign x x x dl3 dl2 dl1 dl0 sign dl3 dl2 dl1 dl0 mode 0 0000 0 pck delay 0 0001 +1 pck delay 0 0010 +2 pck delay 0 0011 +3 pck delay 0 0100 +4 pck delay 0 0101 +5 pck delay 0 0110 +6 pck delay 0 0111 +7 pck delay 0 1000 +8 pck delay 1 1000 -8 pck delay 1 1001 -7 pck delay 1 1010 -6 pck delay 1 1011 -5 pck delay 1 1100 -4 pck delay 1 1101 -3 pck delay 1 1110 -2 pck delay 1 1111 -1 pck delay
KS7314 digital zoom 2) effect register table reg. name register description word 8 effect 7 6 0 mode) command register control data register 1 1 1 x x x x 0 d.zoom / eis / mosaic on (non-dvc mode) 0 0 1 x x x x 0 effect on (mirror /mosaic) (non-dvc mode) 0 1 0 x x x x 0 eis on (non-dvc mode) 1 0 0 x x x x 0 d.zoom on (non-dvc mode) 1 1 0 x x x x 0 d.zoom / eis on (non-dvc mode) 1 1 1 x x x x 1 d.zoom / eis / mosaic on (dvc mode) 0 0 1 x x x x 1 effect on (mirror / mosaic) (dvc mode) 0 1 0 x x x x 1 eis on (dvc mode) 1 0 0 x x x x 1 d.zoom on (dvc mode) 1 1 0 x x x x 1 d.zoom / eis on (dvc mode) mirror mosaic value mode 0 mosaic off 4 4 x 4 mosaic 8 8 x 8 mosaic 12 12 x 12 mosaic 16 16 x 16 mosaic . . . . . . 60 60 x 60 mosaic 64 64 x 64 mosaic 128 horizontal mirror
KS7314 digital zoom 3. gyro micom register table (2 s complement) note) gyro micom interface timing reg. name register description word1 word2 word3 hint hmv hint(9bit) : horizontal motion vector(2 s complement integer) hmv(8bit) : horizontal motion vector(2 s complement sub-pixel) 23 22 17 16 8 7 0 hint hmv msb 1 bit is the sign bit and relates to the integrals and the decimals both. word 4 vmv vertical motion vectio sub-pixel. ( 0 ~ 255 ) scsn 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 word 3(1 byte) control data(4 byte) command(1 byte) sclk si sign x -511 ~ +511 -255 ~ +255 sign bit
KS7314 digital zoom application circuit 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 1 2 3 4 5 6 7 8 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 gyro micom 5v 9 10 11 12 13 14 15 16 17 18 19 20 ks7306 (dcp2) system micom 3v gnd pal fwen gnd gsck gsi gscsn vdd1 gnd uvck gnd ci0 ci1 ci2 ci3 vdd1 co0 co1 co2 co3 yi0 gnd nand-out vdd1 mul-to dzscsn dzsi dzsck gnd gnd dzcblko gnd dzbfo dzcsynco vdd1 gnd gnd gnd dzcsynci dzbfi dzcblki KS7314 yi1 yi2 yi3 yi4 yi5 vdd1 yi7 yo0 yo1 gnd yo2 yo4 vdd2 yo6 yo7 vi6 yo3 yo5 gnd ks7213 timing gen. 5v 5v pblk rst fld vd vblk hd lhld gnd pck vdd1 vdd1 biston error done gnd test0 test1 test2 vdd2 test3 vdd2
KS7314 digital zoom package dimensions 80 - qfp - 1212 unit: mm

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