Television – Bandwidth reduction system – Data rate reduction
Patent
1993-05-14
1995-05-09
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348423, H04N 7133, H04N 7137
Patent
active
054144680
ABSTRACT:
A variable length decoding apparatus capable of a decoding processing at a low speed. The apparatus comprises an initializer for detecting a picture start code, a decoding circuit for receiving data 32 bits by 32 bits and decoding variable length codes, according to a control signal from the initializer, a control circuit for controlling the decoding operation of the decoding circuit, an information type buffering circuit for outputting type signals indicating whether frames, slices and macroblocks are full information or difference information, and outputting horizontal/vertical motion vector information, an extra run level generating circuit for generating data corresponding to a shortage of data, based on a run length code decoding signal outputted from the decoding circuit, a multiplexing circuit for composing an extra run level signal from the extra run level generating circuit, decoded luminance information and decoded color information together, a data buffering circuit for buffering luminarice signals and color signals, and a coefficient generating circuit for detecting discrete cosine transform (DCT) coefficients from the luminance signals and color signals and outputting the detected DCT coefficients.
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"Hardware Implementation of a Codec for a Digital HDTV Recording", P. Stammnitz, K. Bottcher, K. Gruneberg, U. Hofker, H. Klein, Heinrich-Hertz-Institut fur Nachrichtentechnik, Berlin GmbH, 1991, pp. 515-522.
Chin Tommy P.
Goldstar Co. Ltd.
Lee Richard
LandOfFree
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