Video encoding and decoding apparatus

Details Video encoding and decoding apparatus Video encoding and decoding apparatus

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.

Affiliated with

Also associated with

Rating

Video encoding and decoding apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video encoding and decoding apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video encoding and decoding apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-84520