Apparatus for encoding a digital video signal using an adaptive

Details Apparatus for encoding a digital video signal using an adaptive Apparatus for encoding a digital video signal using an adaptive

1996-03-27

1998-06-16

Au, Amelia

Television

Bandwidth reduction system

Data rate reduction

348409, 382248, 382168, H04N 712

Patent

active

057679096

ABSTRACT:
An apparatus for encoding a digital video signal to provide a digitally coded video signal comprises a source coder for generating a set of quantized transform coefficients corresponding to each of the coding blocks, a scanning order determination block for adaptively determining a scanning order for each video frame based on a number of quantized transform coefficients having a non-zero value, located at a same pixel position in each of the coding blocks contained in a video frame and generating scanning order information representing the scanning order for each video frame, a scanner for scanning the set of quantized transform coefficients in response to the scanning order information to thereby generate scanned quantized transform coefficients, a statistical coder for statistically coding the scanned quantized transform coefficients to thereby generate statistically coded data, and a channel coder for encoding the statistically coded data together with the scanning order information to thereby generate digitally coded video signal.

REFERENCES:
patent: 5046121 (1991-09-01), Yonekawa et al.
patent: 5070402 (1991-12-01), Ishii et al.
patent: 5321776 (1994-06-01), Shapiro
patent: 5418714 (1995-05-01), Sarver
patent: 5500678 (1996-03-01), Puri

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