Video signal decoding apparatus

Details Video signal decoding apparatus Video signal decoding apparatus

1996-01-11

1998-12-01

Jastrzab, Jeffrey R.

Television

Bandwidth reduction system

Data rate reduction

348699, 348422, H04N 712

Patent

active

058446141

ABSTRACT:
A video signal decoding apparatus according to the present invention includes a decoding unit for applying a variable length and run-length decoding to a compressed video signal to reconstruct blocks of quantized coefficients. An inverse quantizer is provided for inverse quantizing blocks of reconstructed quantized coefficients. An inverse DCT transforms the inverse quantized blocks of reconstructed quantized coefficients to produce a decoded block. An edge block detector determines whether decoded blocks are classified as an edge block. An adaptive edge enhancement filter removes the distortion in the decoded blocks when the edge block detector classifies decoded blocks as edge blocks. Thus, the video signal is decoded from the encoded video signal.

REFERENCES:
patent: 5260782 (1993-11-01), Hui
patent: 5337087 (1994-08-01), Mishima
patent: 5337088 (1994-08-01), Honjo
patent: 5367385 (1994-11-01), Yuan
patent: 5384849 (1995-01-01), Jeong
patent: 5410350 (1995-04-01), Kato et al.
patent: 5481627 (1996-01-01), Kim
patent: 5528313 (1996-06-01), Tanaka et al.

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