WO2001095637A1 - Image processing apparatus, and image processing method - Google Patents
Image processing apparatus, and image processing method Download PDFInfo
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- WO2001095637A1 WO2001095637A1 PCT/JP2001/004627 JP0104627W WO0195637A1 WO 2001095637 A1 WO2001095637 A1 WO 2001095637A1 JP 0104627 W JP0104627 W JP 0104627W WO 0195637 A1 WO0195637 A1 WO 0195637A1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/129—Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/18—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a set of transform coefficients
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
Definitions
- the present invention relates to an image processing apparatus for decoding an image encoded by a method such as a moving picture experts group (MPEG).
- MPEG moving picture experts group
- FIG. 4 is an explanatory diagram of processing in a conventional image processing apparatus.
- FIG. 4 (a) is a diagram for explaining an image processing unit.
- one screen contains 1920 X 1080 pixels
- one screen contains 720 X 480 pixels.
- This screen is processed in units of 16 x 16 pixels called macroblocks.
- the macro block is further divided into six blocks including 8 ⁇ 8 pixel data, that is, four luminance blocks of Y0, Y1, Y2 and Y3, and two color difference blocks of Cb and Cr. Divided and processed.
- FIG. 4 (b) is a diagram for explaining a bitstream of the variable-length coded image data.
- Data for one macroblock is transmitted for each macroblock in the order of header, luminance blocks Y0 to Y3, and color difference blocks Cb and Cr.
- FIG. 4 (c) is a diagram illustrating pipeline processing in a conventional image processing apparatus.
- the decoding process in order to speed up the process, it is common to perform a pipeline process with a process of a block of 8 ⁇ 8 pixels as one unit. That is, for example, as shown in Fig. 4 (c), variable-length decoding, inverse quantization, and inverse scan are performed.
- Unit A which performs inverse discrete cosine transform
- unit C which performs motion compensation
- unit A When performing such pipeline processing, it is desirable that the processing of each unit be completed in an average number of clock cycles. However, in unit A, it is necessary to perform inverse quantization and inverse scan processing on all 64 data in one block, and store the processed data, so that processing of one block is required. More clock cycles than other units.
- FIG. 5 is a block diagram of a conventional image processing apparatus.
- the image processing apparatus shown in FIG. 5 includes a variable-length decoding unit 81, an inverse quantization / inverse scan processing unit 82, and a data storage unit 83 as a unit A, and a data reading unit 84 and an inverse A discrete cosine transform unit 85 is provided as unit B, and a motion compensation unit 86 is provided as unit C.
- variable-length decoding unit 81 converts the input bit stream to variable-length decoding, converts one block of data into a sequence of 64 numbers, and sequentially performs inverse quantization and inverse scanning. Output to the processing unit 82.
- Inverse quantization 'Inverse scan processing unit 82 performs inverse quantization and inverse scan processing on all 64 numbers per block output from variable length decoding unit 81, and obtains all Is stored in the data storage unit 83.
- the data reading unit 84 reads out the DCT coefficient from the data storage unit 83 and outputs it to the inverse discrete cosine transform unit 85.
- Inverse discrete cosine transform section 85 performs inverse discrete cosine transform on the DCT coefficient, and outputs the restored image data to motion compensation section 86.
- the motion compensation unit 86 performs a motion compensation process using the restored image data.
- Discrete Cosine Transform (DCT) coefficients obtained by performing variable-length decoding on image data such as MPEG streams have a high percentage of values that are zero except for special images .
- inverse quantization and inverse scan processing are performed on all the coefficients obtained in the variable length decoding processing, and the processed data is stored. This has been a bottleneck in speeding up the decryption process. Also such decryption When processing is performed by hardware, it is desirable to realize the processing with as small a circuit area as possible. Disclosure of the invention
- the present invention solves such a problem of the prior art.
- the inverse quantization is performed only on the non-zero coefficients subjected to the variable-length decoding.
- the purpose of the present invention is to increase the speed of the decoding process without significantly increasing the circuit area by performing the inverse scan process.
- the image processing device of the present invention is an image processing device that decodes variable-length coded image data, wherein the image data is variable-length decoded, and the number of consecutive zero coefficients is A variable length decoding unit that outputs a set of zero coefficients; an inverse quantization processing unit that performs an inverse quantization process on the non-zero coefficient to obtain and output inverse quantized data; A data storage unit that stores the inversely quantized data at a specified address, and obtains an address to store the inversely quantized data based on the number of consecutive zero coefficients, and stores the address in the data storage.
- a write setting unit that sets a write flag in its own address corresponding to the address specified by the address setting unit; and reads data from the data storage unit.
- the data of the address specified by the address setting unit is output as it is, while the data of the address other than the address specified by the address setting unit is a predetermined value. And a data reading unit for outputting the data.
- inverse quantization and inverse scan processing are performed only for non-zero coefficients, and the processing results are stored, so that decoding of variable-length codes can be accelerated. Further, since the write flag is stored in correspondence with the address where the inversely quantized data is stored, the required storage capacity is small and the circuit area can be reduced.
- the write information storage unit resets stored data at a predetermined timing. This Then, after resetting, the write information storage unit can perform processing on data in other areas of the image.
- the write information storage unit resets stored data when one block of data is read from the data storage unit by the data read unit. It is preferred that According to this, processing can be performed for each block, and the data storage unit and the write information storage unit only need to have a storage capacity corresponding to the number of data for one block.
- the write information storage unit has a 1-bit storage area for each address. According to this, the storage capacity of the write information storage unit can be reduced, so that the circuit area can be reduced.
- the image processing method of the present invention is an image processing method for decoding variable-length encoded image data, wherein the image data is variable-length decoded, and the number of continuous zero coefficients and the non-zero coefficient
- a variable-length decoding step of obtaining a set of the non-zero coefficients, an inverse quantization processing step of performing an inverse quantization process on the non-zero coefficient, and an inverse scanning process of obtaining an inversely quantized data An address setting step of obtaining a address for storing the inversely quantized data based on the number, and an address setting step of designating the address in the data storage unit; and storing the inversely quantized data in the designated address of the data storage unit.
- the data is read from the data storage unit, and based on the information stored in the write information storage unit, the data of the address other than the address specified in the address setting step is replaced with a predetermined value, while the address data is specified in the address setting step.
- the address data is provided with a data reading step without replacement.
- inverse quantization and inverse scan processing are performed on only non-zero coefficients, and the processing results are stored, so that decoding of the variable length code can be accelerated. Also, a write flag is stored corresponding to the address where the inverse quantization data is stored. Therefore, the required storage capacity is small.
- the present invention it is not necessary to perform inverse quantization and inverse scan processing on zero coefficients after variable-length decoding, and the number of data that must be stored after inverse quantization and inverse scan processing is small.
- the speed of the decoding process can be increased. In particular, since the time required for data storage is short, the entire decoding process can be performed at high speed when performing pipeline processing. In addition, since the storage capacity required for performing such processing can be small, the speed can be increased without increasing the circuit area too much.
- FIG. 1 is a block diagram of an image processing apparatus according to an embodiment of the present invention.
- FIG. 2 is an explanatory diagram illustrating an example of data stored in a data storage unit and a write information storage unit.
- FIG. 3 is a flowchart showing the processing in the image processing apparatus of FIG.
- FIG. 4 is an explanatory diagram of processing in a conventional image processing apparatus.
- FIG. 5 is a block diagram of a conventional image processing apparatus. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a block diagram of an image processing apparatus according to an embodiment of the present invention.
- the image processing apparatus of FIG. 1 includes a variable-length decoding unit 11, an inverse quantization processing unit 12, a data storage unit 13, an address setting unit 14, a write information storage unit 15, a data readout unit A unit 16, an inverse discrete cosine transform unit 17, and a motion compensation unit 18 are provided.
- the bit stream is input to the variable length decoding unit 11.
- the bit stream is data obtained by performing DCT conversion, quantization, scan processing, and variable-length coding on image data by the MPEG system.
- Performing DCT on image data yields DCT coefficients, and then performs quantization and scan processing Then, a sequence of one-dimensionally quantized DCT coefficients is obtained.
- variable-length coding is performed by combining the number of consecutive zero coefficients (including the case of zero) with the nonzero coefficients that follow. The number of consecutive zero coefficients is called run data RUN, and the non-zero coefficient is called level data LEVEL.
- variable length decoding unit 11 performs variable length decoding on the bit stream, and decodes it into a set of run data RUN and level data LEVE L.
- the variable-length decoding unit 11 outputs the level data LEVE L to the inverse quantization processing unit 12 and the run data RUN to the address setting unit 14.
- the inverse quantization processing unit 12 performs inverse quantization on the level data LEVEL, and stores the obtained inverse quantized data, that is, non-zero DCT coefficients, in the data storage unit 13 and the write information storage unit 15. Output to
- the address setting unit 14 is reset when processing of each block is started, and the data order n becomes an initial value "0".
- the data order n indicates the order of the data in the data string containing zeros after variable-length decoding. That is, the data order n indicates the order of the 64 data in the DCT coefficient block after the scan processing.
- the address setting unit 14 has an incrementer and accumulates the run data RUN in the data order n. Thereafter, the address setting unit 14 performs a reverse scan process based on the data order n.
- the address setting unit 14 refers to the inverse scan table, calculates the address AD corresponding to the data order n, that is, the address at which the non-zero DCT coefficient obtained by the inverse quantization processing unit 12 is to be stored, Output to the data storage unit 13 and the write information storage unit 15.
- the inverse quantization processing unit 12 and the address setting unit 14 operate in synchronization, and one address AD is output for one non-zero DCT coefficient.
- the data storage unit 13 and the write information storage unit 15 can simultaneously use a set of the DCT coefficient and the address AD.
- the data storage unit 13 can store 64 pieces of 12-bit data, and stores one piece of data in each of the addresses 0 to 63.
- a write information storage unit 15 can store 64 1-bit data, and stores data one by one in each of the addresses 0 to 63.
- the write information storage unit 15 is reset before starting the processing of each block, and stores "0" in all addresses.
- the data storage unit 13 stores a non-zero DCT coefficient at the address indicated by the address AD.
- the write information storage unit 15 sets "1" as a write flag at the address indicated by the address AD.
- the address setting unit 14 adds “1” to the data order n. In the same manner, data for one block is sequentially processed.
- variable length decoding unit 11 determines that the data for one block has ended, and outputs the block end code EOB to the data reading unit 16. .
- the data reading unit 16 Upon receiving the block end code EOB, the data reading unit 16 starts reading from the data storage unit 13 and the write information storage unit 15.
- the data storage unit 13 and the write information storage unit 15 each have, for example, four read ports, and can read four pieces of data in one cycle.
- the data read unit 16 reads the data at the same address from the data storage unit 13 and the write information storage unit 15 in the same clock cycle. If the value of the write flag at the same address as the read DCT coefficient is "1", the data reading unit 16 outputs the DCT coefficient as it is to the inverse discrete cosine transform unit 17 and outputs the DCT coefficient and the same address as the DCT coefficient. If the value of the write flag is "0”, the DCT coefficient is masked to "0" and output to the inverse discrete cosine transform unit 17.
- the data readout unit 16 is composed of a data storage unit 13 and a write information storage unit 15 When all 64 pieces of data for a block are read, read end information is output to the write information storage unit 15, and the write information storage unit 15 resets all stored data to "0".
- the inverse discrete cosine transform unit 17 performs an inverse discrete cosine transform on the DCT coefficient for each block, and outputs the restored image data to the motion compensation unit 18.
- the above processing is performed on the four luminance blocks Y0, Y1, Y2, and Y3 and the two color difference blocks Cb and Cr.
- the motion compensation unit 18 performs a motion compensation process on the restored image data and outputs the result.
- FIG. 2 is an explanatory diagram illustrating an example of data stored in the data storage unit 13 and the write information storage unit 15.
- FIG. 2A shows data stored in the data storage unit 13
- FIG. 2B shows data stored in the write information storage unit 15.
- the number of non-zero DCT coefficients output by the inverse quantization processing unit 12 for a certain block is two, the DCT coefficient output first is "5", and the DCT coefficient output second is Assume that the T coefficient is "4".
- the data storage unit 13 stores the value “5” of the DCT coefficient in the address 6 thereof. Store. At this time, the write information storage unit 15 also stores "1" in the address 6 as a write flag. Similarly, if the address AD output by the address setting unit 14 is 10 when the second DCT coefficient is output, the data storage unit 13 stores the value “4” of this DCT coefficient in its address. Store in 10. At this time, the write information storage unit 15 also stores "1" in the address 10 as a write flag.
- the data storage unit 13 and the write information storage unit 15 have the same address.
- the data corresponding to each other are stored. Therefore, among the data stored in the data storage unit 13, the non-zero DCT coefficient in this block is stored in the address where the write information storage unit 15 stores "1". It can be seen that unnecessary data is stored in the address.
- the data reading unit 16 replaces these unnecessary data with, for example, “0” and outputs the data.
- the write information storage section 15 Since the write information storage section 15 has only one bit capacity for each address, the area of a circuit for realizing this is very small.
- the address at which the data storage unit 13 actually stores data may be the address A D itself or another address corresponding to the address A one-to-one. Also, the address where the write information storage section 15 stores data may be the same as the address used in the data storage section 13 or may correspond to the address used in the data storage section 13 on a one-to-one basis. Another address may be used.
- the write information storage section 15 stores 1-bit data, but may store 2-bit or more data. Further, as long as the data at the time of reset and the data of the write flag can be distinguished from each other, these data may have any values. For example, "1" may be written to all addresses at reset and "0" may be written as the value of the write flag.
- the data reading section 16 reads all 64 data of one block from the data storage section 13 and the write information storage section 15, it outputs read end information to the write information storage section 15. I decided that. This read end information may be output at any time as long as the data read unit 16 reads all the data for one block and then data about the next block is input to the write information storage unit 15. .
- FIG. 3 is a flowchart of a process in the image processing apparatus of FIG.
- FIG. 3 shows a variable-length decoding unit 11, an inverse quantization processing unit 12, a data storage unit 13, an address setting unit 14, and a write information storage unit 1 of the image processing apparatus of FIG. 5 and the processing of one block of data by the data reading unit 16 is there.
- step S1 the write information storage unit 15 is reset to make all storage contents "0", the address setting unit 14 is reset, and the data order n in the block is set to "0". .
- step S2 variable length decoding is performed on the input bit stream to obtain run data RUN and high level data LEVE L.
- step S3 it is determined whether or not the currently processed decoded data is the block end code EOB. If the data is the block end code EOB, the process proceeds to step S8. If the data is not the block end code EOB, the process proceeds to step S4.
- step S4 the value of the run data RUN is added to the data order n. Further, based on the obtained data order n, an address AD where the non-zero DCT coefficient (inverse quantized data) obtained in step S5 is to be stored is determined by referring to the inverse scan table.
- step S5 the level data LEVE L is subjected to an inverse quantization process to obtain a non-zero DCT coefficient.
- step S6 the non-zero DCT coefficient is stored in the address AD of the data storage unit 13, and a write flag is set in the address of the write information storage unit 15 corresponding to the address AD.
- step S7 1 is added to the data order n in response to storing one non-zero DCT coefficient. Then, the process returns to step S3.
- step S8 data is read from the data storage unit 13, and based on the data in the write information storage unit 15, the data at the address storing the non-zero DCT coefficient is left as it is, and the non-zero DCT coefficient is stored. Is replaced with, for example, "0".
- Steps S4 and S5 may be performed in reverse order or simultaneously.
- the address setting unit 14 has an incrementer for performing addition, but the present invention is not limited to this, and a decrementer for performing subtraction from a predetermined value may be used.
- the inverse discrete cosine transform unit 17 may have the function of the data reading unit 16.
- the present invention is applicable to data encoded by any of MPEG1, MPEG2, and MPEG4. Further, the present invention is not limited to the MPEG system, and can be applied to data encoded by a system that performs variable length encoding such as JPEG.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20010934474 EP1292152B1 (en) | 2000-06-02 | 2001-05-31 | Image processing apparatus, and image processing method |
DE60144228T DE60144228D1 (de) | 2000-06-02 | 2001-05-31 | Verfahren und vorrichtung zur bildverarbeitung |
US10/048,360 US6987811B2 (en) | 2000-06-02 | 2001-05-31 | Image processor and image processing method |
JP2002503044A JP3940672B2 (ja) | 2000-06-02 | 2001-05-31 | 画像処理装置及び画像処理方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2000-166312 | 2000-06-02 | ||
JP2000166312 | 2000-06-02 |
Publications (1)
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WO2001095637A1 true WO2001095637A1 (en) | 2001-12-13 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2001/004627 WO2001095637A1 (en) | 2000-06-02 | 2001-05-31 | Image processing apparatus, and image processing method |
Country Status (5)
Country | Link |
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US (1) | US6987811B2 (ja) |
EP (1) | EP1292152B1 (ja) |
JP (1) | JP3940672B2 (ja) |
DE (1) | DE60144228D1 (ja) |
WO (1) | WO2001095637A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005318560A (ja) * | 2004-03-30 | 2005-11-10 | Matsushita Electric Ind Co Ltd | 可変長復号装置及び方法 |
CN1306823C (zh) * | 2004-07-30 | 2007-03-21 | 联合信源数字音视频技术(北京)有限公司 | 一种并行处理行程解码、反扫描和反量化的方法及装置 |
JP2007329903A (ja) * | 2006-05-11 | 2007-12-20 | Matsushita Electric Ind Co Ltd | 可変長復号化装置、可変長復号化方法および撮像システム |
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US7181070B2 (en) * | 2001-10-30 | 2007-02-20 | Altera Corporation | Methods and apparatus for multiple stage video decoding |
US7190724B2 (en) * | 2002-04-12 | 2007-03-13 | Seiko Epson Corporation | Method and apparatus for transform domain video processing |
JP2005184042A (ja) * | 2003-12-15 | 2005-07-07 | Sony Corp | 画像復号装置及び画像復号方法並びに画像復号プログラム |
US7262718B2 (en) * | 2004-03-30 | 2007-08-28 | Matsushita Electric Industrial Co., Ltd. | Variable length decoder and variable length decoding method |
JP3990392B2 (ja) * | 2004-08-31 | 2007-10-10 | 松下電器産業株式会社 | 可変長復号化装置、可変長復号化方法および撮像システム |
TWI266539B (en) * | 2005-01-13 | 2006-11-11 | Via Tech Inc | Decoding device with multi-buffers |
CN100399832C (zh) * | 2005-01-26 | 2008-07-02 | 威盛电子股份有限公司 | 结合反量化与反曲折扫描的视讯译码装置及其方法 |
US20060222247A1 (en) * | 2005-04-01 | 2006-10-05 | Bhaskar Sherigar | Hardware implementation of inverse scan for a plurality of standards |
JP2006295796A (ja) * | 2005-04-14 | 2006-10-26 | Nec Electronics Corp | 画像データ復号装置及び画像データ復号方法 |
WO2008044637A1 (fr) * | 2006-10-10 | 2008-04-17 | Nippon Telegraph And Telephone Corporation | Procédés de codage et de décodage vidéo, leur dispositif, leur programme, et le support de stockage contenant le programme |
JP7220814B1 (ja) * | 2022-01-21 | 2023-02-10 | エヌ・ティ・ティ・アドバンステクノロジ株式会社 | データ取得装置及びデータ取得方法 |
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2001
- 2001-05-31 EP EP20010934474 patent/EP1292152B1/en not_active Expired - Lifetime
- 2001-05-31 WO PCT/JP2001/004627 patent/WO2001095637A1/ja active Application Filing
- 2001-05-31 US US10/048,360 patent/US6987811B2/en not_active Expired - Lifetime
- 2001-05-31 DE DE60144228T patent/DE60144228D1/de not_active Expired - Lifetime
- 2001-05-31 JP JP2002503044A patent/JP3940672B2/ja not_active Expired - Fee Related
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JPH03177163A (ja) * | 1989-12-06 | 1991-08-01 | Fujitsu Ltd | 画像データ復元方式 |
JPH03293865A (ja) * | 1990-04-11 | 1991-12-25 | Matsushita Electric Ind Co Ltd | 復号化装置 |
JPH04220082A (ja) * | 1990-12-20 | 1992-08-11 | Fujitsu Ltd | 画像データ復元方法及び装置 |
JPH0556271A (ja) * | 1991-07-25 | 1993-03-05 | Fujitsu Ltd | 逆量子化方法および画像データ復元装置 |
Non-Patent Citations (1)
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005318560A (ja) * | 2004-03-30 | 2005-11-10 | Matsushita Electric Ind Co Ltd | 可変長復号装置及び方法 |
JP4607638B2 (ja) * | 2004-03-30 | 2011-01-05 | パナソニック株式会社 | 可変長復号装置及び方法 |
CN1306823C (zh) * | 2004-07-30 | 2007-03-21 | 联合信源数字音视频技术(北京)有限公司 | 一种并行处理行程解码、反扫描和反量化的方法及装置 |
JP2007329903A (ja) * | 2006-05-11 | 2007-12-20 | Matsushita Electric Ind Co Ltd | 可変長復号化装置、可変長復号化方法および撮像システム |
Also Published As
Publication number | Publication date |
---|---|
EP1292152A1 (en) | 2003-03-12 |
JP3940672B2 (ja) | 2007-07-04 |
DE60144228D1 (de) | 2011-04-28 |
EP1292152A4 (en) | 2009-03-25 |
EP1292152B1 (en) | 2011-03-16 |
US20020114528A1 (en) | 2002-08-22 |
US6987811B2 (en) | 2006-01-17 |
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