초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [8.] A coding and decoding apparatus comprising: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 pl

[ What is claimed is:] [8.] A coding and decoding apparatus comprising: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.