KR970057924A

KR970057924A - Quantization Apparatus for Band Division Coding System

Info

Publication number: KR970057924A
Application number: KR1019950052075A
Authority: KR
Inventors: 김종락
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-12-19
Filing date: 1995-12-19
Publication date: 1997-07-31
Also published as: KR100196829B1

Abstract

본 발명은 영상 신호를 각 대역으로 분할한 후 양자화를 수행하고 이를 다시 가변 길이 부호화하는 대역 분할 부호화 시스템의 양자화 장치에 관한 것으로, 대역 분할에 의한 고주파 대역의 신호들을 양자화 하는 양자화부(100)와; 상기 양자화부(100)의 양자화 결과 각 화소의 양자화 크기 데이터가 1인 화소를 검출하는 중김 양자화 크기 검출부(110)와; 상기 양자화 크기 데이터가 1인 각 화소를 중심으로 십자형 윈도우를 형성하는 윈도우 형성부(120)와; 상기 십자형 윈도우의 중심 화소를 제외한 나머지 4개의 화소의 양자화 크기 데이터가 0인지를 검출하는 주변 양자화 크기 검출부(130)와; 상기 십자형 윈도우의 주변 화소 양자화 크기 데이터가 모두 영이고, 중심 화소 양자화 크기 데이터가 1일 경우 중심 화소 양자화 크기 데이터를 영으로 세트하는 양자화 수정부(140)를 구비하여 구성함을 특징으로 한다.The present invention relates to a quantization apparatus of a band division coding system for performing quantization after dividing an image signal into respective bands and performing variable length coding again. The present invention relates to a quantization unit 100 for quantizing high frequency band signals by band division. ; A weighted quantization size detection unit (110) for detecting a pixel having quantization size data of each pixel as a result of quantization of the quantization unit (100); A window forming unit (120) for forming a cross-shaped window around each pixel having the quantization size data of 1; A peripheral quantization size detector (130) for detecting whether the quantization size data of the remaining four pixels except for the center pixel of the cross window is zero; When the peripheral pixel quantization size data of the cruciform window is all zero and the center pixel quantization size data is 1, the quantization correction unit 140 sets the center pixel quantization size data to zero.

Description

Quantization Apparatus for Band Division Coding System

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

제2도는 본 발명의 바람직한 실시예를 나타내는 블록 구성도.2 is a block diagram showing a preferred embodiment of the present invention.

Claims

A band division encoding system for performing quantization after dividing an image signal into respective bands and performing variable length encoding again; A quantization unit (100) for quantizing the signals of the high frequency band by the band division; A center quantization size detection unit (110) for detecting pixels whose quantization size data of each pixel is smaller than a preset value as a result of quantization of the quantization unit (100); A window forming unit 120 for forming a cross-shaped window centering on each pixel whose quantization size data is smaller than a preset value; A peripheral quantization size detector (130) for detecting whether the quantization size data of the remaining four pixels except for the center pixel of the cross window is zero; In the case of the band division encoding system including a quantization correction unit 140 for setting the center pixel quantization size data to zero when all of the peripheral pixel quantization size data of the cruciform window is zero and the center pixel quantization size data is smaller than a preset value. Quantization Device.

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