Television – Bandwidth reduction system – Data rate reduction
Patent
1993-11-29
1995-10-24
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 750
Patent
active
054614210
ABSTRACT:
To encode a video signal by means of an interlace scanning method, a mode which generates the minimum number of bits with respect to four modes such as frame/field and inter/intra is selected and the video signal of the selected mode is encoded by adaptive frame/field processing. An encoder includes a direct current differential pulse code modulator for performing a direct current differential pulse code modulation only in the frame intramode and the field intramode among four paths to select a predetermined mode, and another direct current differential pulse code modulator for performing a direct current differential pulse code modulation according to the path of the selected mode by selecting one of the delayed signals after selecting the mode. A decoder has the similar constitution to that of the encoder and properly restores the DC value which is differentially pulse code modulated according to a predetermined mode, thereby decoding the restored signal into an original video signal.
REFERENCES:
patent: 5093720 (1992-03-01), Krause
patent: 5347308 (1994-09-01), Wai
Britton Howard W.
Samsung Electronics Co,. Ltd.
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