KR950013266A

KR950013266A - Transmission rate control device of moving picture compression system

Info

Publication number: KR950013266A
Application number: KR1019930022957A
Authority: KR
Inventors: 강정석
Original assignee: 김광호; 삼성전자 주식회사
Priority date: 1993-10-30
Filing date: 1993-10-30
Publication date: 1995-05-17

Abstract

본 발명에 따른 동화상압축시스템의 전송률제어장치는 이미 처리된 매크로 블럭의 신호특성들을 사용하여 영상전체의 신호특성을 고려하여 양자화 간격을 보정함으로써 동일한 전송률하에서도 효율적인 비트할당을 수행하여 우수한 화질을 얻을 수 있는 이점이 있다.The rate control apparatus of a moving picture compression system according to the present invention obtains excellent image quality by performing efficient bit allocation under the same bit rate by correcting the quantization interval in consideration of the signal characteristics of the entire image using the signal characteristics of the already processed macro block. There is an advantage to this.

Description

Transmission rate control device of moving picture compression system

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 MPEG 동화상 부호화기의 블럭도,1 is a block diagram of an MPEG video encoder,

제2도는 제1도에 도시된 종래 레귤레이터의 상세블럭도,2 is a detailed block diagram of the conventional regulator shown in FIG.

제3도는 본 발명에 따른 레귤레이터의 상세블럭도,3 is a detailed block diagram of a regulator according to the present invention;

제4도는 매크로 블럭수에 따른 양자화 간격을 나타내는 도면.4 is a diagram showing a quantization interval according to the number of macro blocks.

Claims

A quantization means for quantizing and encoding the discrete cosine-converted digital video signal data by a predetermined quantization interval in macroblock units, and a buffer for constant bit generation rate of the coded data, the bit being output from the buffer. The regulating means for generating the quantization level based on the generation amount and controlling the quantization means includes bit allocation means for generating a target number of bits for outputting data, input bit generation amount output from the buffer, A quantization level for outputting to the quantization means by the rate control means for outputting the quantization interval based on the number of target bits to be output and the complexity of the macroblock currently processing the quantization interval output by the rate control means. Composed of adaptive quantization means In the rate control apparatus of the image compression system, if the complexity of the previous macroblock currently being processed is smaller than the average complexity of the previous frame by the average complexity of the previous frame and the complexity of the previous macroblock currently being processed. And a quantization interval correction means for lowering the quantization interval output from the means and increasing the quantization interval output from the rate control means if the complexity of the previous macro block currently being processed is greater than the average complexity of the previous frame. Transmission rate control device for moving picture compression system.

The method according to claim 1, wherein the quantization interval correcting means generates a large value as a correction coefficient when the average complexity of the previous frame is larger than the average complexity of the previous macroblock by the average complexity of the previous frame and the average complexity of the previous macroblock. Correction control means for generating, as a correction coefficient, a smaller one when the average complexity of the previous frame is smaller than the average complexity of the previous macroblock; Compared to the complexity of the macroblock currently being processed at the quantization interval output from the rate control means and the average complexity of the previous frame, if the complexity of the macroblock being processed is less than the average complexity of the previous frame, it is output from the integrity control means. Correction means for subtracting by the correction coefficient, and adding the correction coefficient output from the correction control means to correct the quantization interval for output to the adaptive quantization means if the complexity of the macroblock being processed is greater than the average complexity of the previous frame. A rate control apparatus for a moving picture compression system, characterized in that consisting of.

※ Note: The disclosure is based on the initial application.