Television – Bandwidth reduction system – Data rate reduction
Patent
1994-08-12
1995-12-12
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348403, H04N 730
Patent
active
054754348
ABSTRACT:
A blocking effect attenuation apparatus for a high definition television receiver, includes a variable length decoder for receiving encoded video data and extracting therefrom a quantization level, a quantized DCT coefficient and a motion vector, an inverse quantizer for generating a DCT coefficient by convening the quantized DCT coefficient from the variable length decoder into frequency domain data according to the quantization level from the variable length decoder, an inverse DCT unit for restoring the DCT coefficient from the inverse quantizer into spatial domain data, a frame memory for storing video data of a previous frame, an adder for adding data output from the frame memory to data output from the inverse DCT unit to output video data of a present frame, a motion estimator for transferring the motion vector from the variable length decoder to the frame memory, a block analysis circuit for generating a filtering flag in response to the quantization level and the quantized DCT coefficient from the variable length decoder, and a block filtering circuit for selectively filtering blocks of the video data of the present frame from the adder in response to the filtering flag from the block analysis circuit.
REFERENCES:
patent: 4367629 (1984-11-01), Chu et al.
patent: 4754492 (1988-06-01), Malvar
patent: 4941043 (1990-07-01), Jass
patent: 5311310 (1994-05-01), Jozawa et al.
Au A.
Chin Tommy P.
Goldstar Co. Ltd.
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