WO2006043483A1 - 映像信号処理装置 - Google Patents
映像信号処理装置 Download PDFInfo
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- WO2006043483A1 WO2006043483A1 PCT/JP2005/018968 JP2005018968W WO2006043483A1 WO 2006043483 A1 WO2006043483 A1 WO 2006043483A1 JP 2005018968 W JP2005018968 W JP 2005018968W WO 2006043483 A1 WO2006043483 A1 WO 2006043483A1
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- interpolation
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- video signal
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- video
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
Definitions
- the present invention relates to a video signal processing apparatus that performs electronic zoom processing of a video signal.
- a video signal captured by a solid-state imaging device such as a CCD (Charge-Coupled Device) is enlarged or reduced by electronic zoom processing (for example, see Patent Document 1).
- CCD Charge-Coupled Device
- FIG. 13 is a block diagram of an imaging apparatus using a conventional electronic zoom.
- the conventional imaging apparatus includes an imaging lens / aperture lens 51 having a filter, an image sensor CCD 52, and a gamma correction 'low-pass filter' imaging circuit. 53, an AD converter (ADC) 54 that converts analog signals into digital signals, a frame memory 55 that stores image signals for each frame, an interpolator 56 that interpolates data between pixels of the image, and image edges Edge enhancement processing circuit 57 that performs enhancement, DA converter (DAC) 58 that converts a digital signal into an analog signal, recording circuit 59 that records an imaging signal, and write address controller 60 that specifies the write address of the frame memory 55 Read address controller 61 that specifies the read address of the frame memory 55, and switches between tele (telephoto) and wide (wide angle) That Terewaido and (TZ W) switching switch 62, and a magnification generation circuit 63 for generating a magnification for electronic zooming according to the switching state of Terewaido switching switch 62 Ru.
- ADC AD converter
- DAC digital converter
- DAC
- the electronic zoom function is realized by the frame memory 55, the write address controller 60, the read address controller 61, the interpolation circuit 56, and the magnification generation circuit 63.
- the signal AD-converted by the AD converter 54 is written to an address in the frame memory 55 designated by the write address controller 60.
- read address controller 6 is instructed by magnification generation circuit 63. 1 generates a read address, and the signal is also read with that address power.
- the read signal is interpolated by the interpolation circuit 56 based on an instruction from the magnification generation circuit 63, whereby an imaging signal having a desired magnification is obtained.
- Patent Document 1 Japanese Patent Laid-Open No. 7-170461
- the present invention has been made to solve the conventional problems, and an object thereof is to provide a video signal processing apparatus capable of realizing an electronic zoom function at a low cost.
- the video signal processing apparatus of the present invention performs line interpolation means for delaying the video signal by one horizontal scanning period, vertical interpolation processing from the video signal and the output of the line delay means, and horizontal processing. And interpolating means for performing a horizontal interpolation process between adjacent pixels in the direction and outputting a valid flag indicating a period during which the output signal is valid.
- the interpolation process is performed separately in the horizontal direction and the vertical direction, and the vertical process is performed for each line, so that it is not necessary to use a frame memory.
- interpolation means that outputs a valid flag indicating the period of time is configured.
- interpolation processing is performed together with interpolation processing, and electronic zoom can be performed at an arbitrary magnification from reduction to enlargement.
- the video signal processing apparatus of the present invention includes a video signal output means for outputting a video signal in synchronization with a horizontal synchronization signal and a vertical synchronization signal, and the video signal for the same period as one cycle of the horizontal synchronization signal.
- Line delay means for delaying by a minute, and video delayed by the line delay means
- An interpolation means for comparing a signal with the video signal output by the video signal output means, and interpolating between pixels adjacent in the vertical direction of the video represented by the video signal delayed by the line delay means, and depending on the vertical magnification
- a zoom control means for controlling the interpolation means so as to interpolate between pixels adjacent in the vertical direction.
- the interpolating means further interpolates between pixels adjacent in the horizontal direction of the video in which the pixels adjacent in the vertical direction are interpolated, and the zoom control means corresponds to the horizontal magnification.
- the interpolating means is controlled to interpolate between the pixels adjacent in the horizontal direction.
- the zoom control means has a configuration in which the interpolation means controls to interpolate between adjacent pixels in the horizontal direction before being delayed by the line delay means.
- the interpolation means includes a vertical interpolation means for generating a video signal showing an image interpolated between the pixels adjacent in the vertical direction, and an interpolation between the pixels adjacent in the horizontal direction.
- Horizontal interpolation means for generating a video signal showing the displayed video
- the zoom control means indicates a valid period of the video signal generated by the vertical interpolation means with a vertical line valid flag.
- the horizontal zoom control means for indicating the effective period of the video signal generated by the horizontal interpolation means with a horizontal line valid flag, and the instructions of the horizontal line valid flag and the vertical line valid flag.
- a logical product that generates a valid flag signal indicating a period in which both the horizontal direction and the vertical direction are valid, and outputs the generated valid flag signal in synchronization with the video signal generated by the horizontal interpolation means. Circuit It was to that configuration.
- the vertical zoom control unit calculates a vertical interpolation coefficient from the vertical magnification, and the vertical interpolation unit multiplies the video signal delayed by the line delay unit by the vertical magnification.
- a multiplier a second multiplier that multiplies the video signal output from the video signal output means by the complement of the vertical magnification, and a video signal obtained by multiplying the video signal multiplied by the vertical magnification and the complement of the vertical magnification.
- An adder that generates a video signal indicating a sum of the signal and the vertical zoom control means, wherein the vertical interpolation means converts the video signal generated by the adder into the horizontal synchronization signal and the vertical synchronization signal. The control is performed so as to output to the horizontal interpolation means in synchronization.
- the horizontal zoom control means calculates a horizontal interpolation coefficient from the horizontal magnification, and the horizontal interpolation means delays the video signal received from the vertical interpolation means by one pixel.
- Means a first multiplier that multiplies the video signal received from the vertical interpolation means by the horizontal interpolation coefficient, and a video signal delayed by the one-pixel delay means is multiplied by the complement of the horizontal interpolation coefficient.
- a horizontal multiplier comprising: a second multiplier; and an adder that generates a video signal indicating a sum of a video signal multiplied by the horizontal interpolation coefficient and a video signal multiplied by a complement of the horizontal interpolation coefficient.
- the control means is configured to output the video signal generated by the adder of the horizontal interpolation means in synchronization with the horizontal synchronization signal and the vertical synchronization signal.
- the line delay means is constituted by line storage means having three banks capable of storing one horizontal line of the video represented by the video signal, and the line storage means includes the 3
- the first bank power of the two banks Sequentially writes the video for one line in the horizontal direction, writes the video for one line to the third bank, then returns to the first bank, Write the video for the next line on the video for the one line written in the above, and write the video for all the horizontal lines of the video for one frame.
- the write operation to the three banks is repeated until the line storing means stores V in the remaining two of the three banks when writing to any one of the three banks.
- Read the video for two lines, and output the read video for two lines to the interpolating means, and the interpolating means between the adjacent pixels in the vertical direction of the video for two lines read by the line storing means. Was configured to be interpolated.
- the video for one line in the horizontal direction is sequentially written from the first bank among the three banks, the video for one line is written to the third bank, and then the first bank is written. Return to the bank and write the next line of video on top of the previously written video for one line, then write to the three banks until all the horizontal lines of the video for one frame are written.
- the zoom control unit is configured to control the interpolation unit to interpolate between pixels adjacent in the horizontal direction before being stored in the line storage unit.
- FIG. 1 is a block diagram of a video signal processing device according to a first embodiment of the present invention.
- FIG. 2 is a timing chart showing a synchronization signal of the video signal processing device and an output signal of the image sensor in the first embodiment of the present invention.
- FIG. 3 is a block diagram of zoom control means and interpolation means of the video signal processing device according to the first embodiment of the present invention.
- FIG. 4 is a vertical interpolator of the video signal processing device according to the first embodiment of the present invention. It is a block diagram of a stage.
- FIG. 5 is a timing chart showing the vertical interpolation operation of the video signal processing apparatus according to the first embodiment of the present invention.
- FIG. 6 is a block diagram of a horizontal interpolation means of the video signal processing device in the first embodiment of the present invention.
- FIG. 7 is a timing chart showing the horizontal interpolation operation of the video signal processing device in the first embodiment of the present invention.
- FIG. 8 is a timing chart showing output signals after electronic zoom processing of the video signal processing device in the first embodiment of the present invention.
- FIG. 9 is a block diagram of a video signal processing device according to a second embodiment of the present invention.
- FIG. 10 is a block diagram of interpolation means of the video signal processing device in the second embodiment of the present invention.
- FIG. 11 is a timing chart showing the vertical interpolation operation of the video signal processing apparatus in the second embodiment of the present invention.
- FIG. 12 is a timing chart showing the horizontal interpolation operation of the video signal processing device in the second embodiment of the present invention.
- FIG. 13 is a block diagram of a conventional imaging device.
- Horizontal interpolation means a Calculation unit
- Line storage means Vertical interpolation calculation means Pixel storage means Horizontal interpolation calculation means Vertical interpolation control means Horizontal interpolation control means Lens
- Edge enhancement processing circuit 58 DA converter (DAC) DAC
- FIG. 1 is a block diagram showing the configuration of the video signal processing apparatus according to the first embodiment of the present invention.
- the video signal processing apparatus includes a lens 11 that focuses light and performs focus adjustment so that an image is formed at a preset position. Condensed light is converted into an electrical signal, an image sensor 12 that generates a analog video signal indicating an image formed at a preset position, and an analog video signal output from the image sensor 12 is subjected to analog preprocessing.
- Analog pre-processing means 13 for noise removal and gain adjustment of analog video signals, and analog-digital conversion (hereinafter simply referred to as AZD conversion) for converting analog video signals analog pre-processed by analog pre-processing means 13 into digital signals 14,
- a YZC signal processing means 15 for performing luminance (Y) signal processing and color difference (C) signal processing on the digital signal output from the ZD converter 14 to generate a luminance signal and a color difference signal, and imaging Element 12
- Luminance signals and color difference signals generated by the image sensor driving means 19 for generating the driving pulse signals (including the horizontal synchronizing signal and the vertical synchronizing signal) and the YZC signal processing means 15 are delayed by a preset time.
- the zoom control means 17 is provided with a magnification setting means (not shown) for setting the vertical magnification and horizontal magnification required for the interpolation processing in the zoom control means 17.
- the analog preprocessing means 13, the AZD converter 14, the YZC processing means 15, and the image sensor driving means 1 constitute a video signal output means.
- the video signal output means outputs the video signal to the line delay means 16 and the interpolation means 18 in synchronization with the horizontal synchronization signal and the vertical synchronization signal.
- the preset delay time of the line delay means 16 of the present embodiment is the same as one period (one horizontal scanning period) of the horizontal synchronization signal.
- FIG. 2 is a timing chart showing the timing of the analog video signal generated by the image sensor 12 with respect to the horizontal synchronization signal and the vertical synchronization signal.
- the image sensor 12 outputs an analog video signal to the YZC signal processing means 15 in synchronization with the horizontal synchronizing signal and the vertical synchronizing signal.
- the YZC signal processing means 15 outputs the luminance signal and the color difference signal to the line delay means 16 and the interpolation means 18 in synchronization with the horizontal synchronizing signal and the vertical synchronizing signal.
- the interpolation means 18 acquires the luminance signal and color difference signal output from the YZC signal processing means 15 and the luminance signal and color difference signal delayed by the line delay means 16 in synchronization with the horizontal synchronization signal and the vertical synchronization signal. It is supposed to be. Therefore, the interpolation means 18 can acquire from the line delay means 16 the luminance signal and color difference signal delayed by a time equal to one cycle of the horizontal synchronizing signal from the luminance signal and color difference signal output by the YZC signal processing means 15. Thus, it is possible to easily compare the luminance and color difference of two pixels adjacent in the vertical direction.
- the YZC signal processing means 15 generates a luminance signal and a color difference signal from the digital signal converted by the AZD converter 14! Instead of the color difference signal, an RGB (Red-Green-Blue) signal may be generated. Therefore, the interpolation means 18 may perform an RGB signal interpolation process.
- RBG signals can be electronically zoomed in the same way as luminance signal and chrominance signal interpolation processing, so do not specify the type of signal like luminance, chrominance signals, and RBG signals. , Will be described.
- the zoom control unit 17 includes a vertical zoom control unit 171 that performs vertical zoom control, a horizontal zoom control unit 172 that performs horizontal zoom control, and a vertical zoom control unit 171. And an AND circuit 173 that performs a logical product of the vertical line valid flag output by the horizontal zoom control unit 172 and the horizontal pixel valid flag output by the horizontal zoom control unit 172, and the interpolation means 18 performs vertical processing. Interpolation means 181 and horizontal interpolation means 182 for performing horizontal processing are provided.
- FIG. 4 is a block diagram showing the configuration of the vertical interpolation means 181 in more detail.
- the vertical interpolation means 181 includes an arithmetic unit 181a that calculates 1 ⁇ from the input vertical interpolation coefficient ⁇ , and the input vertical interpolation coefficient ⁇ and the YZC signal processing means 15 A first multiplier 181b that multiplies the output by the output, a second multiplier 181c that multiplies the output of the line delay means 16 by 1 ⁇ output from the arithmetic unit 181a, and an output of the first multiplier 181b. And an adder 181d for adding the output of the second multiplier 181c.
- FIG. 5 shows an example of the operation of the video signal processing apparatus when the vertical magnification is 2Z3.
- the vertical synchronization signal, the output signal of the YZC signal processing means 15, the output signal of the line delay means 16, and the vertical interpolation means A timing chart of the output signal 181 and the vertical line valid flag is shown.
- FIG. 5 shows an example in which the number of effective lines during one vertical scanning period is 12 lines.
- V (O), V (l),..., V (ll) are input signals to the vertical interpolation means 181 and correspond to each pixel for one line. It shows that.
- the output signal from the line delay means 16 is one line behind the output of the YZC signal processing means 15.
- W (O), W (l),..., W (7) are output signals of the vertical interpolation means 181 and indicate that they correspond to each pixel for one line.
- int dS rounds down the decimal part of j8 to an integer.
- the above expression may be a high-order interpolation of force, which is an arithmetic expression for linear interpolation of two-point force
- V (int (jZ vertical magnification) + 1) is required, so V (int ( Calculation is performed on the line where jZ vertical magnification) + 1) is input.
- V (i) is input for each line, but it is not necessary to calculate for all lines. It is only necessary to calculate V (int (jZ vertical magnification) + 1). Note that calculations in one line must be performed for each pixel, and must be performed for pixels at the same horizontal position.
- the vertical zoom control means 171 receives a vertical magnification, and based on this vertical magnification, ⁇ ⁇ and
- ⁇ 8 V is calculated, the timing for calculating W (j) is calculated based on the above formula, the vertical line valid flag indicating the effective line is output, and the timing for calculating W (j) is set.
- the corresponding vertical interpolation coefficient ⁇ ⁇ is output to the vertical interpolation means 181.
- the “ ⁇ ” level is the active line, and the “L” level is the invalid line.
- FIG. 6 is a block diagram showing the configuration of the horizontal interpolation means 182 in more detail.
- the horizontal interpolation means 182 includes an operation unit 182a that calculates 1 ah from an input horizontal interpolation coefficient ah, an input horizontal interpolation coefficient ah, and an output of the vertical interpolation means 181.
- FIG. 7 shows an example of the operation of the video signal processing apparatus when the horizontal magnification is 2Z3.
- the horizontal synchronization signal, the clock, the input signal to the horizontal interpolation means 182 and the output signal of the horizontal interpolation means 182 The horizontal pixel valid flag timing chart is shown.
- FIG. 7 an example in which the number of effective pixels in one horizontal scanning period is 15 pixels is shown, and one pixel is processed in one clock!
- x (O), x (l),..., X (14) are input signals to the horizontal interpolation means 182 and correspond to input pixels for one line
- y (O), y (l),..., y (9) are output signals of the horizontal interpolation means 182 and correspond to output pixels for one line.
- the above expression may be a high-order interpolation of force, which is an arithmetic expression for linear interpolation of two-point force
- the input signal x (int (jZ horizontal magnification) +1) is required, so x (int ( Calculation is performed at the timing when jZ horizontal magnification (+1) is input. In other words, it is not necessary to calculate with all clocks x (i) force S input for every clock. It is only necessary to calculate for the clock period when x (int (jZ horizontal magnification) +1) is input.
- the output signal of the horizontal interpolation means 182 is valid during the period during which this calculation is performed and the output during other periods is invalid, a valid flag indicating whether it is valid or invalid is required.
- This horizontal pixel valid flag is generated by the horizontal zoom control means 172.
- the horizontal zoom control means 172 receives the horizontal magnification, calculates ah and i8 h based on this horizontal magnification, calculates the timing for calculating y (j) based on the above formula,
- the horizontal pixel valid flag indicating that y is output, and the corresponding horizontal interpolation coefficient ah is output to the horizontal interpolation means 182 in accordance with the timing of calculating y (j).
- “H” level is a valid pixel
- “L” level is an invalid pixel.
- the AND circuit 173 of the zoom control means 17 performs an AND (logical product) of the vertical line effective flag and the horizontal pixel effective flag to generate an effective flag signal.
- FIG. 8 shows a video signal (output signal) output from the image sensor 12 in synchronization with the horizontal synchronization signal and the vertical synchronization signal, an output signal after the electronic zoom process, and a valid flag signal of the AND circuit 173. It is a timing chart.
- the device that has received the output signal after the electronic zoom process and the valid flag signal output from the video signal processing device uses the valid flag signal to obtain effective pixel information from the output signal after the electronic zoom process. Can only take out. Therefore, a device that has received the output signal and the valid flag signal after the electronic zoom processing can acquire an electronic zoomed image.
- the video signal processing apparatus performs electronic zoom processing separately in the horizontal direction and the vertical direction, and performs vertical processing for each line.
- the electronic zoom function can be realized with only line memory that does not require the use of frame memory, and the electronic zoom function can be realized at low cost.
- horizontal interpolation is performed after performing vertical interpolation.
- the vertical processing and the horizontal processing are independent and do not matter in order, it does not matter if the vertical interpolation is performed after the horizontal interpolation.
- the line delay means 16 is inserted between the horizontal interpolation means 182 and the vertical interpolation means 181.
- the line delay means may be constituted by a line storage means having three banks capable of storing one horizontal line of the video represented by the video signal.
- the line storage means is the first bank force of the three banks, one horizontal line Sequentially, and after writing one line of video to the third bank, return to the first bank and video of the next one line on top of the previously written video of one line.
- the writing operation to the three banks is repeated until all the horizontal lines of the video for one frame are written, and when the line storage means writes to any one of the three banks, the three The two lines of video stored in the remaining two of the bank are read, and the read two lines of video are output to the interpolation means.
- the interpolating means interpolates between adjacent pixels in the vertical direction of the two lines of video read by the line storage means.
- FIG. 9 is a block diagram showing the configuration of the video signal processing apparatus according to the second embodiment of the present invention.
- the video signal processing apparatus according to the present embodiment is configured in substantially the same manner as the video signal processing apparatus according to the first embodiment described above, and the same components are denoted by the same reference numerals. The description of the components having the same reference numerals will be omitted, and only the features that are different from the components of the video signal processing device of the first embodiment will be described.
- the video signal processing apparatus of the present embodiment is characterized by comprising an interpolation means 21 for performing an interpolation process on the output signal after the electronic zoom process output from the interpolation means 18.
- the interpolating means 21 stores the electronic zoom output signal according to the write address “bank”, and can read out the two banks simultaneously according to the read address “bank”, and the line storage means 211 2 lines of signal power output from the vertical interpolation calculation means 212 for performing interpolation processing according to the vertical interpolation coefficient, pixel storage means 213 for storing signals for one pixel, and horizontal interpolation from the output of the pixel storage means 213
- the horizontal interpolation calculation means 214 that performs interpolation processing according to the coefficients
- the vertical interpolation control means 215 that controls the vertical interpolation processing by controlling the line storage means 211 and the vertical interpolation calculation means 212
- the horizontal interpolation calculation means 214 are controlled.
- Horizontal interpolation control means 216 for controlling the horizontal interpolation processing.
- FIG. 11 is a timing chart showing an operation example in the case of performing interpolation processing twice in the vertical direction.
- Z (0), Z (l),... Are electronic zoom outputs output from the interpolation means 18 and are inputs to the interpolation means 21, and L (O), L (l),. ... is the output of the vertical interpolation calculation means 212
- the electronic zoom output input to the interpolation means 21 is stored in the line storage means 211 according to the write address' bank output from the vertical interpolation control means 215.
- the line storage means 211 has a storage area of 3 banks, and the bank to be written is switched for each line. By sequentially switching the three banks, the data is not overwritten until the reading is completed.
- magnification to be complemented is Nv (2 in the figure)
- reading from the line storage means 211 reads Nv times from the two banks that have already been written at a speed Nv times the writing speed.
- Nv times the same bank force is read twice at twice the speed.
- the line storage unit 211 also stores an input valid flag, and sets the valid flag read at Nv double speed as the vertical interpolation valid flag.
- FIG. 12 is a timing chart showing an operation example in the case of performing interpolation processing twice in the horizontal direction.
- K (O), K (l),... are the output pixels of the vertical interpolation calculation means 212 and the input pixels of the horizontal interpolation calculation means 214, and ⁇ ( ⁇ ), M (l), ... are output pixels of the horizontal interpolation calculation means 214.
- the vertical interpolation output output by the vertical interpolation calculation means 212 is input to the horizontal interpolation calculation means 214 and also to the pixel storage means 213, and the timing of one pixel is delayed by the pixel storage means 213. To the horizontal interpolation calculation means 214.
- the horizontal interpolation calculation means 214 performs interpolation processing for Nh clocks (pixels) during one input clock (pixel) and is input.
- the interpolated pixel is output in units of Nh times the signal clock.
- the magnification of the video processing apparatus is the interpolation magnification X the interpolation magnification. Therefore, any magnification from reduction to enlargement can be set.
- the video signal processing device has the effect that the electronic zoom function can be realized at low cost, and the video signal processing device performs electronic zoom processing of the video signal. Useful as such.
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JP2006542950A JPWO2006043483A1 (ja) | 2004-10-18 | 2005-10-14 | 映像信号処理装置 |
US11/577,342 US20090046176A1 (en) | 2004-10-18 | 2005-10-14 | Video signal processing apparatus |
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JP2004302747 | 2004-10-18 | ||
JP2004-302747 | 2004-10-18 |
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US8994877B2 (en) * | 2008-07-30 | 2015-03-31 | Semiconductor Components Industries, Llc | Method and system for synchronizing a flash to an imager |
TW201037626A (en) * | 2009-04-01 | 2010-10-16 | Novatek Microelectronics Corp | Method for accessing image data and related apparatus |
KR102295526B1 (ko) | 2017-04-10 | 2021-08-30 | 삼성전자 주식회사 | 이미지 센서 및 이를 포함하는 이미지 처리 장치 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1021387A (ja) * | 1996-07-02 | 1998-01-23 | Sony Corp | 画像処理装置および処理方法 |
JP2001109442A (ja) * | 1999-10-01 | 2001-04-20 | Sanyo Electric Co Ltd | 映像信号処理回路 |
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JPH083956B2 (ja) * | 1986-09-18 | 1996-01-17 | 日本テキサス・インスツルメンツ株式会社 | 半導体記憶装置 |
US4988984A (en) * | 1988-10-31 | 1991-01-29 | International Business Machines Corporation | Image interpolator for an image display system |
US5469222A (en) * | 1992-12-23 | 1995-11-21 | Intel Corporation | Non-linear pixel interpolator function for video and graphic processing |
JP3231142B2 (ja) * | 1993-06-18 | 2001-11-19 | 株式会社日立製作所 | 映像圧縮拡大回路及び装置 |
KR0175406B1 (ko) * | 1995-11-15 | 1999-03-20 | 김광호 | 고해상도의 전자식 영상확대장치 및 그 방법 |
-
2005
- 2005-10-14 WO PCT/JP2005/018968 patent/WO2006043483A1/ja active Application Filing
- 2005-10-14 JP JP2006542950A patent/JPWO2006043483A1/ja not_active Withdrawn
- 2005-10-14 US US11/577,342 patent/US20090046176A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1021387A (ja) * | 1996-07-02 | 1998-01-23 | Sony Corp | 画像処理装置および処理方法 |
JP2001109442A (ja) * | 1999-10-01 | 2001-04-20 | Sanyo Electric Co Ltd | 映像信号処理回路 |
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