Image coding apparatus

Details Image coding apparatus Image coding apparatus

1994-09-30

1997-03-04

Ramirez, Ellis B.

Boots, shoes, and leggings

395114, G09C 110

Patent

active

056086547

ABSTRACT:
An image coding apparatus wherein coding processing is performed efficiently and the generated code amount is controlled to a substantially fixed level is disclosed. The image coding apparatus comprises a setting circuit for setting a coding parameter, a coding circuit for coding input image data using the coding parameter, a code amount measurement circuit for measuring the amount of codes generated by the coding circuit, an aimed code amount setting circuit for setting an aimed code amount, a calculation circuit for calculating a code amount difference between the aimed code amount and the generated code amount, and a coding parameter control apparatus for controlling the coding parameter of the setting circuit in accordance with the code amount difference such that the setting circuit first sets an initial value as the coding parameter and then sets, in accordance with the code amount difference calculated from the amount of codes newly generated using the initial value, another value as the coding parameter to be used for next coding for the same image data.

REFERENCES:
Coding of Moving Pictures and Associated Audio-- for Digital Storage Media at up to about 1.5 mbH/s--May 15, 1992--1-D 60.
New Scaled DCT Algorithms for Fused Multiply/Add Architectures--1991--Linzer et al. pp. 2201-2204.
A Fast DCT-SQ Scheme for Images--Nov. 1988--Arai et al--pp. 1095-1097.
The Journal Of The Institute Of Image Electronics Engineers Of Japan, vol. 18, No. 6, pp. 398-409, 1989.

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