Television – Bandwidth reduction system – Data rate reduction
Patent
1996-10-03
1998-06-16
Lee, Richard
Television
Bandwidth reduction system
Data rate reduction
382250, H04N 730
Patent
active
057679100
ABSTRACT:
A video signal compressing/encoding system includes a first memory for storing an input video signal including a series of pixel signals; a converting unit connected to the first memory for receiving a plurality of the pixel signals from the first memory and producing outputs by applying the read out pixel signals to a discrete cosine transforming process; an encoding unit connected to the converting unit for compressing and encoding the outputs of the converting unit; and second and third memories provided between the converting unit and the encoding unit for storing the outputs of the converting unit; wherein a series of the pixel signals stored in the first memory are divided into a plurality of macroblocks, each macroblock including a predetermined number of the pixel signals, the pixel signals included in each macroblock are read out both in an order of a first mode and in another order of a second mode, the outputs of the converting unit derived from the pixel signals read out in the order of the first mode are stored in the second memory, the outputs of the converting unit derived from the pixel signals read out in the order of the second mode are stored in the third memory, one of the second and third memories is selected, the outputs of the converting unit stored in the selected memory are read out, and the read out outputs of the converting unit are applied to the encoding unit.
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Point-Illustration, Newest MPEG Textbook, K.K. Ascii, 1994, pp. 19, 137-155, and 277 (No Translation).
Lee Richard
Nippon Steel Corporation
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