KR960043882A - Video phone with multiple video codecs and its operation method - Google Patents

Video phone with multiple video codecs and its operation method Download PDF

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Publication number
KR960043882A
KR960043882A KR1019950013282A KR19950013282A KR960043882A KR 960043882 A KR960043882 A KR 960043882A KR 1019950013282 A KR1019950013282 A KR 1019950013282A KR 19950013282 A KR19950013282 A KR 19950013282A KR 960043882 A KR960043882 A KR 960043882A
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KR
South Korea
Prior art keywords
video
codec
video codec
protocol
standard
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KR1019950013282A
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Korean (ko)
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KR0149776B1 (en
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황재식
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김광호
삼성전자 주식회사
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Priority to KR1019950013282A priority Critical patent/KR0149776B1/en
Publication of KR960043882A publication Critical patent/KR960043882A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN

Abstract

1. 청구범위에 기재된 발명이 속하는 기술분야1. TECHNICAL FIELD OF THE INVENTION

본 발명은 H.261 비데오 코덱과 비규격 비데오 코덱을 구비하며 전송프로토콜에 응답하여 상기 비데오 코덱들중의 하나를선택적 사용하는 복수 비데오코덱을 갖는 영상전화기 및 그 운용방법에 관한 것이다.The present invention relates to a video telephone having an H.261 video codec and a non-standard video codec, and having a plurality of video codecs for selectively using one of the video codecs in response to a transmission protocol, and a method of operating the same.

2. 발명이 해결하고자 하는 기술절 과제2. The technical clause problem to be solved by the invention

본 발명은 규격화 비데오 코덱과 화질이 개선되는 비규격 비데오 코덱을 구비하여 다양한 접속상태에 일치하여 선택적으로 비데오 코덱을 사용하는 복수 비데오 코덱을 갖는 영상전화기를 제공함에 있다.The present invention provides a video telephone having a standard video codec and a non-standard video codec having improved image quality, and having a plurality of video codecs selectively using video codecs in accordance with various connection conditions.

3. 발명의 해결방법의 요지3. Summary of Solution to Invention

본 발명은 독자 영상압축 알고리즘을 구현하는 방법에 따라서 구체적인 방법은 변할수 있으나, 기본적으로 H.261 비데오코덱(70)과 비규격 비데오 코덱(200)을 구비하고, 영상통신을 위한 H.242 프로토콜 절차에서,MBE 능력 메세지 내용중 비규격화 메세지값의 하위코드값인 국가코드와 회사코드를 교환하여 상기 상호 교환된 메시지내의 하위코드에 대응하여 비데오코덱을 비규격 비데오 코덱(200) 또는 H.261 비데오 코덱(70)으로 선택하여 영상통신을 이룬다.The present invention may vary depending on the method of implementing the original image compression algorithm, but basically includes an H.261 video codec 70 and a non-standard video codec 200, and H.242 protocol procedure for video communication. In the MBE capability message content, the video codec is converted into a non-standard video codec 200 or an H.261 video corresponding to the sub-code in the interchanged message by exchanging a country code and a company code which is a sub-code value of the non-standardized message value. The video codec is selected by the codec 70.

4. 발명의 중요한 용도4. Important uses of the invention

본 발명은 ISDN망에서의 동영상전화기에서 중요히 사용될수 있다.The present invention can be importantly used in video telephones in ISDN networks.

Description

복수 비데오코덱을 갖는 영상전화기 및 그 운용방법Video phone with multiple video codecs and its operation method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명의 바람직한 일 실시예에 따른 영상전화기의 블록구성도이다.2 is a block diagram of a video telephone according to a preferred embodiment of the present invention.

Claims (3)

영상전화기에 있어서, 소정 선택신호에 응답하여 동작되며, 영상입력신호를 ITU 권고안 H.261에 따라 압축하여 부호화하며, 수신되는 영상데이터를 복호화하여 출력하는 H.261 비데오 코덱과, 상기 선택신호에 응답하여 동작되며, 소정 영상압축 및 신장알고리즘을 구비하고 영상입력신호를 상기 영사압축알고리즘에 따라 압축하여 부호화하며, 수신되는 영상데이터를 상기 영상신장알고리즘에 따라 복호화하여 출력하는 비규격 비데오 코덱과, 입력음성신호룰 부호화하며, 수신되는 음성데이터를 복호화하여 출력하는 오디오코덱과, 상기 오디오 코덱과비규격 비데오 코덱 또는 H.261비디오코덱으로부터 각각 부호화된 영상 및 음성데이터를 ITU권고안 H.221 프레임 포맷으로 포맷팅하며, 수신되는 H.221 프레임포맷의 영상 및 음성데이터를 복원하여 상기 오디오 코덱과 비규격화 비디오 코덱 또는 H.261비데오코덱으로 인가하는H.221 인터페이싱수단과, 상기 H.221인터페이싱수단과 ISDN간의 인터페이스를 제공하는 ISDN 인터페이싱수단과, 영상전화기의 전체적인 동작을 제어하며, 영상전화기의 프로토콜교환 절차에서 호접속희망 상대와 교신되는 프로토콜의 비데오코덱선택정보에 따라 상기 선택신호를 상기 H261비데오코덱과 비규격 비데오코덱으로 선택절 출력하는 제어부와. 시스템 소프트웨어와 데이터를 저장하는 기억수단으로 구성함을 특징으로 하는 복수 비데오코덱을 갖는 영상전화기.In a video telephone, an H.261 video codec which operates in response to a predetermined selection signal, compresses and encodes a video input signal according to ITU Recommendation H.261, and decodes and outputs the received video data. A non-standard video codec having a predetermined image compression and decompression algorithm, compressing and encoding an image input signal according to the projection compression algorithm, and decoding and outputting the received image data according to the image extension algorithm; An audio codec that encodes an input audio signal and decodes and receives the received audio data, and encodes video and audio data encoded from the audio codec, a non-standard video codec or an H.261 video codec, respectively, in the ITU Recommendation H.221 frame format. And restore the received video and audio data in the H.221 frame format. H.221 interfacing means for applying to the video codec and non-standardized video codec or H.261 video codec, ISDN interfacing means for providing the interface between the H.221 interfacing means and ISDN, and controls the overall operation of the video telephone. And a control section for outputting the selection signal to the H261 video codec and the non-standard video codec according to the video codec selection information of the protocol communicated with the call connection requesting party in the protocol exchange procedure of the video telephone. A video telephone having a plurality of video codecs, characterized by comprising system software and storage means for storing data. 제1항에 있어서, 상기 프로토콜의 비데오선택정보가 H242프로토콜의 MBE 능력 메시지에서 구비됨을 특징으로 하는 복수 비데오 코덱을 갖는 영상전화기.2. The video telephone of claim 1, wherein the video selection information of the protocol is provided in the MBE capability message of the H242 protocol. 영상입력신호를 ITU 권고안 H.261에 따라 압축하여 부호화하며 수신되는 영상데이터를 복호화하여 출력하는 H.261 비데오 코덱과, 소정 영상압축 및 신장알고리즘을 구비하고 영상입력신호를 상기 영상압축알고리즘에 따라 압축하여 부호화하며, 수신되는 영상데이터를 상기 영상신장알고리즘에 따라 복호화하여 출력하는 비규격 비데오코덱을 구비하는 영상전화기의 운용방법에 있어서, 호접속희망 상대와 H242프로토콜을 교환하는 모드 초기화단계와, 상기 모드 초기화단계에서 수신되는 상대 H242 프로토콜을 검색하여 비규격화 모드메세지가 있는가를 판단하는 프로토콜 판단단계와, 상기 프로토콜 판단단계의 판단결과 소정시간내에 비규격화모드메시지가 있음을 인지하면, 비정규 동작모드로 전환하여 비규격 비데오 코덱을 인에이블시키는 선택신호를 출력하여 비규격화 동작모드를 수행하는 비규격화모드 수행단계와. 상기프로토콜 판단단계의 판단결과 소정시간내에 비규격화모듬메시지가 검색되지 않으면, H261 동작모드로 전환하여 H261 비데오 코덱을 인에이블시키는 선택신호를 출력하여 H261 동작모드를 수행하는 규격화모드 수행단계로 구성함을 특징으로하는 복수 비데오 코덱을 갖는 영상전화기의 운용방법.H.261 video codec which compresses and encodes video input signals according to ITU Recommendation H.261 and decodes and outputs received video data, and has a predetermined video compression and decompression algorithm. The video input signals are converted according to the video compression algorithm. A method of operating a video telephone having a non-standard video codec that compresses and encodes and decodes and receives received video data according to the video extension algorithm, the method comprising: a mode initialization step of exchanging an H242 protocol with a call-connecting partner; A protocol determination step of determining whether there is an unstandardized mode message by searching for a counterpart H242 protocol received in the mode initialization step, and when it is determined that there is a non-standardized mode message within a predetermined time as a result of the determination of the protocol determination step, returns to the non-normal operation mode. Choice to switch to enable non-standard video codecs And outputting an arc with non-normalized mode performing step for performing a non-standardized operating mode. If the non-standardized message is not detected within a predetermined time as a result of the determination of the protocol, the standardized mode performing step of switching to the H261 operation mode and outputting a selection signal for enabling the H261 video codec is performed to perform the H261 operation mode. Operating method of a video telephone having a plurality of video codecs characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950013282A 1995-05-25 1995-05-25 Video telephone having plural video codec and method of operating the same KR0149776B1 (en)

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KR1019950013282A KR0149776B1 (en) 1995-05-25 1995-05-25 Video telephone having plural video codec and method of operating the same

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KR0149776B1 KR0149776B1 (en) 1998-10-15

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