Television – Bandwidth reduction system – Data rate reduction
Patent
1997-09-25
2000-07-04
Britton, Howard
Television
Bandwidth reduction system
Data rate reduction
348419, 382251, H04N 736, H04N 750
Patent
active
060846364
ABSTRACT:
A method employed in an encoding apparatus allocates bits for each of the pictures and blocks of a video signal based on quantization-dependent and quantization-independent signal thereof. First, the quantization-dependent signal is quantized based on a fixed quantization parameter; and the quantized data and the quantization-independent signal are statistically coded to thereby provided first data and second data. A target amount of encoded bits for each picture and block is then determined based on a target bit rate and the respective amounts of the first and the second data. The amounts of encoded data for the pictures and the blocks are adaptively controlled according to the target amounts of encoded bits by adjustably altering quantization parameters based on the difference between the target amount of the encoded bits and the amount of the encoded data generated.
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Fujiwara Mitsuaki
Nakagawa Hiroshi
Nishitani Masayoshi
Sugahara Takayuki
Ueda Motoharu
Britton Howard
Lieberstein Eugene
Meller Michael N.
Victor Company of Japan Ltd.
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