Method and apparatus for controlling a target amount of code and

Details Method and apparatus for controlling a target amount of code and Method and apparatus for controlling a target amount of code and

1997-03-18

2000-08-08

Lee, Young

Television

Bandwidth reduction system

Data rate reduction

348415, H04N 712

Patent

active

061009318

ABSTRACT:
An apparatus and method for encoding input video data representative of a number of group of pictures (GOPs) each having a plurality of fields or frames. The apparatus includes a first encoder for processing received input video data so as to determine difficulty data of a field or frame which is indicative of the difficulty of the video data, a computing device for determining a target code amount representative of an amount of data to be utilized in accordance with the difficulty data of a number (N) of the fields or frames, and a second encoder for encoding the received video data in accordance with the target code amount. The computing device determines the target code amount such that the target code amount for an ith field or frame is determined in accordance with the difficulty data of the N fields or frames from a jth field or frame, the target code amount for an ith+1 field or frame is determined in accordance with the difficulty data of the N fields or frames from a jth+1 field or frame, the target code amount for an ith+2 field or frame is determined in accordance with the difficulty data of the N fields or frames from a jth+2 image, and so forth. As a result, an acceptable allocation of bits may be provided for the encoding processing such that an image may be restored with a relatively high quality.

REFERENCES:
patent: 5214507 (1993-05-01), Aravind et al.
patent: 5231484 (1993-07-01), Gonzales et al.
patent: 5245427 (1993-09-01), Kunihiro
patent: 5291282 (1994-03-01), Nakagawa et al.
patent: 5694170 (1997-12-01), Tiwari et al.

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