Moving picture coding and/or decoding systems, and variable-length coding and/or decoding system
a technology of moving picture and coding, which is applied in the field of moving picture variable-length coding and/or decoding systems, can solve the problems of coded data not being correctly decoded, the decoding system cannot correctly encode data, and the average code length of reversible code is long, so as to reduce the amount of operation and reduce the number of useless bits. , the effect of efficient encoding and/or decoding data
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first preferred embodiment
[0152]FIG. 6 is a block diagram of the first preferred embodiment of a variable length coding and / or decoding system according to the present invention.
[0153] As shown in FIG. 6, the variable length coding and / or decoding system in the first preferred embodiment generally comprises a code-word table preparing part 101, a coding part 113, a transmission or storage system 105 and a decoding part 114. First, the functions of the respective parts will be briefly described. The code-word table preparing part 101 prepares a code-word table on the basis of the occurrence probability of source symbols, and transmits code words to a code-word table 102 provided in the coding part 113 and a forward code-word table 111 and a backward code-word table 112, which are provided in the decoding part 114. The coding part 113 encodes the source symbols to a variable length code, and outputs the variable length code as coded data to the transmission or storage system 105. The decoding part 114 decodes...
second preferred embodiment
[0177] As the second preferred embodiment of the present invention, an applied example of a variable length coding and / or decoding system according to the present invention will be described below.
[0178]FIG. 16 is a block diagram showing the concept of a moving picture coding and / or decoding system, which incorporates the second preferred embodiment of a variable length coding and / or decoding system according to the present invention. First, in a moving picture encoder 709, the variable length coding, multiplexing and so forth of data coded by a source encoder 702 are carried out by means of a moving picture multiplexer 703. Then, the resulting data are smoothed by means of a transmission buffer 704 to be transmitted to a transmission or storage system 705 as coded data. A coding control part 701 controls the source encoder 702 and the moving picture multiplexer 703 in view of the buffer capacity of the transmission buffer 704.
[0179] On the other hard, in a moving picture 710, the...
third preferred embodiment
[0195] Referring to FIG. 28, the third preferred embodiment of a variable length coding and / or decoding system, according to the present invention, will be described below.
[0196] In this third preferred embodiment, the variable length coding and / or decoding system generally comprises a code-word table preparing part 101, a coding part 113, a transmission or storage system 105 and a decoding part 121. First, the functions of the respective parts will be briefly described. The code-word table preparing part 101 prepares a code-word table on the basis of the occurrence probability of source symbols, and transmits code words to a code-word table 102 in the coding part 113 and to forward and backward code-word tables 111 and 112 in the decoding part 121. The coding part 113 encodes the source symbol to a variable length code, and outputs the variable length code to the transmission or storage system 105 as coded data. The decoding part 121 decodes the coded data inputted via the transmi...
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