Coding/decoding apparatus
First Claim
1. A coding apparatus comprising:
- input means for inputting an image signal;
coding means for coding the image signal input by said input means, said coding means having at least first and second coding modes, wherein in the first coding mode intra-picture coding is performed and wherein in the second coding mode inter-picture coding is performed; and
error detection/correction coding means for performing error detection/correction coding for the image signal coded by said coding means, said error detection/correction coding means performing error detection/correction coding having a different error correction ability depending on the coding mode,wherein an error correction ability in the first coding mode is higher than an error correction ability in the second coding mode.
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Abstract
According to the present invention, there is provided a coding apparatus including an input unit for inputting image data, a coding unit for coding the image data input by the input unit, and an error detection/correction coding unit for performing error detection coding or correction coding of the image data coded by the coding unit, the coding unit coding the image data by selectively using first and second coding modes based on different coding methods, and the error detection/correction coding unit performing different error correction and correction coding operations depending on the coding mode. In addition, there is provided a decoding apparatus for inputting coded data which is coded by selectively using first and second coding modes based on different coding methods and has undergone different error correction coding operations depending on the first and second coding modes, and coding mode data indicating a specific one of the first and second coding modes by which the coded data has been coded, and decoding the coded data, including a detection unit for detecting the coding mode data, and an error code correction unit for performing error code correction of the coded data in accordance with an output from the detection unit.
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Citations
28 Claims
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1. A coding apparatus comprising:
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input means for inputting an image signal; coding means for coding the image signal input by said input means, said coding means having at least first and second coding modes, wherein in the first coding mode intra-picture coding is performed and wherein in the second coding mode inter-picture coding is performed; and error detection/correction coding means for performing error detection/correction coding for the image signal coded by said coding means, said error detection/correction coding means performing error detection/correction coding having a different error correction ability depending on the coding mode, wherein an error correction ability in the first coding mode is higher than an error correction ability in the second coding mode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A coding apparatus comprising:
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a) block forming means for forming a block of sample values of an input signal; b) coding means having at least first and second coding modes, wherein in the first coding mode the block of the input signal is coded by using data representative of differences between prediction values and the sample values of the block, and wherein in the second coding mode the block of the input signal is coded without using the data representative of differences; and c) error detection/correction coding means for performing error detection coding or correction coding for the input signal coded by said coding means, wherein said error detection/correction coding means performs error detection or correction coding having a different error correction ability depending on the coding mode. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A coding apparatus comprising:
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block forming means for forming blocks of sample values of an input signal; coding means having at least first and second coding modes, wherein in the first coding mode the blocks formed by said block forming means are prediction-coded, and wherein in the second coding mode the blocks formed by said block coding means are coded without prediction; and error detection/correction coding means for performing error detection/correction coding for the input signal coded by said coding means, wherein said error detection/correction coding means performs error detection/correction coding having a different error correction ability depending on the coding mode, and wherein an error correction ability in the second coding mode is higher than an error correction ability in the first coding mode. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A decoding apparatus comprising:
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inputting means for inputting coded data which was coded by using first and second coding modes respectively based on different coding methods and which has undergone error detection/correction coding having a different error correction ability depending on which of the first and second coding modes was used to generate the coded data, the first coding mode for performing intra-picture coding and the second coding mode for performing inter-picture coding, wherein an error correction ability in the first coding mode is higher than an error correction ability in the second coding mode; detection means for detecting which coding mode the coded data input by said inputting means was coded with; and error code correction means for performing error code correction of the coded data in accordance with an output of said detection means. - View Dependent Claims (20, 21)
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22. A coding method comprising:
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an input step of inputting an image signal; a coding step of coding the image signal input in said input step, said coding step having at least first and second coding modes, wherein in the first coding mode intra-picture coding is performed and wherein in the second coding mode inter-picture coding is performed; and an error detection/correction coding step of performing error detection/correction coding for the image signal coded in said coding step, said error detection/correction coding step performing error detection/correction coding having a different error correction ability depending on the coding mode, wherein an error correction ability in the first coding mode is higher than an error correction ability in the second coding mode. - View Dependent Claims (23, 24)
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25. A decoding method comprising:
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an inputting step of inputting coded data which was coded by using first and second coding modes respectively based on different coding methods and which has undergone error detection/correction coding having a different error correction ability depending on which of the first and second modes was used to generate the coded data, the first coding mode for performing intra-picture coding and the second coding mode for performing inter-picture coding, wherein an error correction ability in the first coding mode is higher than an error correction ability in the second code mode; a detection step of detecting which coding mode the coded data input in said inputting step was coded with; and an error code correction step of performing error code correction of the coded data in accordance with an output in said detection step.
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26. A coding method comprising:
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a block forming step of forming a block of sample valued of an input signal; a coding step of coding the block, said coding step having at least first and second coding modes, wherein in the first coding mode the block is coded by using data representative of differences between prediction values and the sample values of the block, and wherein in the second coding mode the block is coded without using the data representative of the differences; and an error detection/correction coding step of performing error detection coding or correction coding for the block coded in said coding step, said error detection/correction coding step performing error detection coding or correction coding having a different error correction ability depending on the coding mode. - View Dependent Claims (27, 28)
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Specification