Coding and decoding apparatus which transmits and receives tool information for constructing decoding scheme
First Claim
1. A coding and decoding apparatus comprising:
- a coding side for transmitting coded data together with tool information for identifying tools which constitute an algorithm for decoding the coded data;
a decoding side for storing a plurality of decoding schemes and performing decoding of received coded data based on one of the previously stored decoding schemes;
tool storage means for storing tools;
tool-correspondent information storing means for storing tool-correspondent information;
comparing means for comparing received tool information with the stored tool-correspondent information; and
selection controlling means for selecting an optimal tool from said tool storage means based on a result of comparison by said comparing means to perform processing with the optimal tool,the coded data, and the tool information, being transmitted together, the received coded data being decoded using the optimal tool selected based on the received tool information.
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Abstract
A coding and decoding apparatus is constructed so that the coding side transmits coded data together with identifying information for identifying the device of decoding the coded data, and the decoding side is capable of storing a number of decoding schemes so as to perform decoding based on one of the previously stored schemes. The apparatus further has devices for storing the received tools and tool-correspondent information which numerically represents the capacities of the tools so that it can make a comparison between the decoding capacity and the processing capacities of the tools to determine the possibility of the operations of the received tools. Further, a set of the tools are hierarchized so that the coded data produced by the n-ranked tool can be decoded by the (n+1)-ranked tool. Alternatively, the tools are defined in a hierarchical manner so that the decoding tools installed in the decoding apparatus will be able to assure the minimum quality and the requested decoding process can be performed by the received decoding tool. Further, the identification code of the decoding scheme used can be transmitted as required so that the decoding scheme can be expanded by transmitting the differential information from the basic decoding scheme.
55 Citations
17 Claims
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1. A coding and decoding apparatus comprising:
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a coding side for transmitting coded data together with tool information for identifying tools which constitute an algorithm for decoding the coded data; a decoding side for storing a plurality of decoding schemes and performing decoding of received coded data based on one of the previously stored decoding schemes; tool storage means for storing tools; tool-correspondent information storing means for storing tool-correspondent information; comparing means for comparing received tool information with the stored tool-correspondent information; and selection controlling means for selecting an optimal tool from said tool storage means based on a result of comparison by said comparing means to perform processing with the optimal tool, the coded data, and the tool information, being transmitted together, the received coded data being decoded using the optimal tool selected based on the received tool information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A coding and decoding apparatus comprising:
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coding means for transmitting coded data together with tool information for identifying tools which constitute a decoding scheme for decoding the coded data;
the coding means comprising a database of coding schemes for storing plural kinds of coding schemes and functional tools which constitute the coding schemes, a coding scheme selector for selecting a coding scheme based on input data, a coding section for coding input data in conformity with the selected coding scheme, and a coding controller for controlling said coding means;decoding means for storing a plurality of decoding schemes so as to perform decoding based on one of the previously stored decoding schemes, said decoding means receiving the tool information and reconstructing the decoding scheme based on the tool information received, received coded data being decoded based on the reconstructed decoding scheme, the tool information comprising an identification code of a previously defined basic decoding scheme and differential information form the basic decoding scheme so that said decoding means recognizes the decoding scheme to be reconstructed. - View Dependent Claims (9)
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10. A coding and decoding apparatus comprising:
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coding means for transmitting coded data together with tool information for identifying tools which constitute a decoding scheme for decoding the code data; decoding means for storing a plurality of decoding schemes so as to perform decoding based on one of the Previously stored decoding schemes the decoding means comprising a database of decoding schemes for storing the plurality of decoding schemes and functional tools which constitute the decoding schemes, a decoding scheme constructing section for reconstructing the decoding scheme in accordance with the received tool information, a decoding section for decoding the received coded data in conformity with the reconstructed decoding scheme, and a decoding controller for controlling said decoding means; said decoding means receiving the tool information and reconstructing the decoding scheme based on the tool information received received coded data being decoded based on the reconstructed decoding scheme, the tool information comprising an identification code of a previously defined basic decoding scheme and differential information from the basic decoding scheme so that said decoding means recognizes the decoding scheme to be reconstricted. - View Dependent Claims (11, 12, 13)
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14. A coding and decoding apparatus comprising:
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coding means for transmitting coded data together with decoding tools which constitute an algorithm for decoding the coded data; and decoding means for storing a plurality of decoding schemes so as to perform decoding based on one of the previously stored decoding schemes, said decoding means reconstructing the algorithm using the transmitted decoding tools to decode received coded data based on the algorithm and storing the decoding tools and upon receipt of the coded data which is decodable by the decoding tools, said decoding means decoding the coded data using the decoding tools previously stored, the decoding tools big defined in a hierarchical manner so that in place of a decoding tool of a certain rank, a higher-ranked decoding tool can be used for operation to obtain a minimum quality, said coding means simultaneously transmitting the decoding tool and the coded data if said decoding means does not have a decoding tool required for decoding. - View Dependent Claims (15, 16, 17)
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Specification