Television – Bandwidth reduction system – Data rate reduction
Patent
1996-10-24
1998-10-06
Lee, Richard
Television
Bandwidth reduction system
Data rate reduction
348420, H04N 730
Patent
active
058185313
ABSTRACT:
An encoding apparatus includes an encoder for encoding an alpha-map signal for discriminating a background from an object of an input picture in motion compensation prediction (MV)+transform encoding which uses MV in a domain of each of N.times.N transform coefficients (n), a transform circuit for transforming Pf into n in accordance with the alpha-map signal, an inverse transform circuit for reconstructing Pf by inversely transforming n in accordance with the alpha-map signal, a selector for obtaining a motion compensation prediction value (p) in the mth layer (m=2 to M) by switching p in the mth layer and p in the (m-1)th layer for each n, the selector selecting p in the mth layer for n by which a quantized output (Q) in the (m-1)th layer is 0 and selecting p in the (m-1)th layer for n by which Q=1 or more, an adder for calculating a difference df between a prediction error signal in the mth layer and a dequantized output in the (m-1)th layer, and an encoder for encoding and outputting the quantized signal of df. This encoding apparatus realizes SNR scalability in M layers.
REFERENCES:
patent: 4833535 (1989-05-01), Ozeki et al.
patent: 4969039 (1990-11-01), Koga et al.
patent: 4982285 (1991-01-01), Sugiyama
patent: 5337049 (1994-08-01), Shimoda
patent: 5420638 (1995-05-01), Riglet et al.
patent: 5592228 (1997-01-01), Dachiku et al.
T.K. Tan, et al., "A Frequency Scalable Coding Scheme Employing Pyramid and Subband Techniques", IEEE Transactions On Circuits And Systems For Video Technology, vol. 4, No. 2, Apr. 1994, pp. 203-207.
Ida Takashi
Watanabe Toshiaki
Yamaguchi Noboru
Kabushiki Kaisha Toshiba
Lee Richard
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