[특허]Multiplex transmission method and system, and audio jitter absorbing method used therein

[미국특허] Multiplex transmission method and system, and audio jitter absorbing method used therein 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-003/24
출원번호	US-0848470 (1997-05-08)
우선권정보	JP0007275 (1997-01-20)
발명자 / 주소	Kurobe Akio,JPX Shinoda Mayumi,JPX Ikeda Koji,JPX
출원인 / 주소	Matsuhita Electric Industrial Co., Ltd., JPX
대리인 / 주소	Wenderoth, Lind & Ponack, L.L.P.
인용정보	피인용 횟수 : 75 인용 특허 : 2

초록 ▼

A multiplex frame is of a fixed length and includes a header and a fixed-length field. The fixed-length field is divided into variable-length slots 1 and 2. The length of the variable-length slot 1 is a predetermined fixed length when data to be stored exists and is zero with no data to be stored. The length of the variable-length slot 2 is increased/decreased depending on the length of the variable-length slot 1. Fixed-length data not employing retransmission (e.g., an audio frame) is transmitted in the first variable-length slot and one complete variable-length data employing retransmission (e.g., a data link frame of video) is transmitted in the second variable-length slot. When the multiplex frame thus has a fixed length and the frame length of the data link frame of the variable-length data employing retransmission is changed depending on the length of the fixed-length data not employing retransmission, the transmitting timing of the data link frames can be fixed with respect to the transmission stream of the multiplex frames. Then the boundaries between the data link frames are not lost due to a transmission error, which improves the error robustness. That is to say, even if the slot synchronization is lost due to a transmission error, it is possible to see the next header at once, providing easy resynchronization.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for multiplexing and transmitting variable-length data and fixed-length data in multiplex frames, wherein the variable-length data is data on which retransmission has been employed and to which error correction by retransmission control has been applied, and the fixed-length data is data on which retransmission has not been employed and to which error correction by retransmission control has not been applied, said method comprising:forming multiplex frames such that each multiplex frame has a fixed length, and forming a variable-length data link frame in each multiplex frame such that the data link frame has a frame length based on the length of the fixed-length data, and storing the variable length data in the data link frame;transmitting the multiplex frames in a transmission stream of the multiplex frames; andbefore said transmitting, storing each data link frame such that each data link frame is completed in one multiplex frame so that the data link frames can be transmitted at a timing kept in synchronization, for each multiplex frame, with the transmission stream of the multiplex frames.

이 특허에 인용된 특허 (2) 인용/피인용 타임라인 분석

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[미국특허] Multiplex transmission method and system, and audio jitter absorbing method used therein 원문보기

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[미국특허] Multiplex transmission method and system, and audio jitter absorbing method used therein 원문보기

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