Patent ID: 6901109
Filing Date: 2005-05-31
Classification: H04N

Abstract:
1. A coded signal separating and merging system comprising: a coded signal separating apparatus for inputting a first coded moving picture sequence signal to separate into a second coded moving picture sequence signal and a differential coded moving picture sequence signal; and a coded signal merging apparatus for inputting said second coded moving picture sequence signal and said differential coded moving picture sequence signal to reconstruct said first coded moving picture sequence signal, said coded signal separating apparatus including: inputting means for inputting said first coded moving picture sequence signal therethrough, said first coded moving picture sequence signal generated as a result of encoding original moving picture sequence signal and consisting of a series of first picture information having first coefficient information, said first coefficient information including a matrix of first coefficients; coded signal converting means for converting said first coded moving picture sequence signal inputted through said inputting means to generate said second coded moving picture sequence signal, said second coded moving picture sequence signal consisting of a series of second picture information having second coefficient information, said second coefficient information including a matrix of second coefficients, each of said first coded moving picture sequence signal, and said second coded moving picture sequence signal is in the form of a hierarchical structure including one or more sequence layers each having a plurality of screens sharing common information, one or more picture layers each having a plurality of slices sharing common information with respect to one of said screens, one or more slice layers each having a plurality of macroblocks with respect to one of said slices, one or more macroblock layers each having a plurality of blocks with respect to one of said macroblocks, and one or more block layers each having block information with respect to one of said blocks; differential coded signal generating means for inputting said first coded moving picture sequence signal and said second coded moving picture sequence signal from said coded signal converting means to generate a differential coded moving picture sequence signal on the basis of said first coefficient information obtained from said series of first picture information of said first coded moving picture sequence signal, and said second coefficient information obtained from said series of said second picture information of said second coded moving picture sequence signal, said differential coded moving picture sequence signal being a difference between said first coded moving picture sequence signal and said second coded moving picture sequence signal; separating storage means for selectively storing said first coded moving picture sequence signal, said second coded moving picture sequence signal, and said differential coded moving picture sequence signal; and first transmission means for selectively transmitting said first coded moving picture sequence signal, said second coded moving picture sequence signal, and said differential coded moving picture sequence signal to said coded signal merging apparatus; said coded signal merging apparatus including: first receiving means for receiving a base coded moving picture sequence signal transmitted by said first transmission means from said coded signal separating apparatus, said base coded moving picture sequence signal being any one of said first coded moving picture sequence signal, said second coded moving picture sequence signal, and said differential coded moving picture sequence signal; merging storage means for storing coded moving picture sequence signal including said base coded moving picture sequence signal received by said first receiving means; request signal determining means for determining a request signal for a requested coded moving picture sequence signal on the basis of said base coded moving picture sequence signal stored by said merging storage means; and request signal transmission means for transmitting said request signal for said requested coded moving picture sequence signal determined by said request signal determining means to said coded signal separating apparatus; whereby said coded signal separating apparatus further includes: request signal receiving means for receiving said request signal transmitted by said request signal transmission means from said coded signal merging apparatus; separating coded signal extracting means for extracting said requested coded moving picture sequence signal from said separating storage means in response to said request signal; and second transmission means for transmitting said requested coded moving picture sequence signal extracted by said separating coded signal extracting means to said coded signal merging apparatus; said coded signal merging apparatus includes: second receiving means for receiving said requested coded moving picture sequence signal transmitted by said second transmission means from said coded signal separating apparatus; merging coded signal extracting means for extracting said base coded moving picture sequence signal from said merging storage means; merging means for merging said base coded moving picture sequence signal extracted by said merging coded signal extracting means with said requested coded moving picture sequence signal received by said second receiving means on the basis of said second coefficient information obtained from said series of second picture information of said second coded moving picture sequence signal, and said differential coefficient information obtained from said differential coded signal to reconstruct said first coded moving picture sequence signal; and outputting means for inputting said reconstructed first coded moving picture sequence signal from said merging means to be outputted therethrough.