BROWSE
Detail
Conference Paper
MPEG 미디어 전송 시스템을 위한 E-layer 타이밍 모델
Cited - time in 
Share 
Share
- Issue Date
- 2011-12
- Citation
- 전자 정보 통신 학술 대회 (CEIC) 2011, pp.29-33
- Publisher
- 대한전자공학회
- Language
- Korean
- Type
- Conference Paper
- Abstract
- A general streaming system includes for the media synchronization. As a basic function, a transmitter generates a timestamp and inserts it in a media stream such that a receiver side can restore the play-out time of the media units. MPEG system standard provides timestamps, such as Program Clock Reference (PCR), Presentation Time Stamp (PTS), and Decoding Time Stamp (DTS), and defines a synchronization model in a system layer. On the contrary, IEFT provides timestamps, such as RTP timestamp, and Network Time Protocol (NTP) timestamp. Each RTP packet carries a 32 bits timestamp which reflects the sampling instant of the first byte in the data packet. For MPEG payloads, the sampling instant is derived from a 90 KHz clock. Besides RTP timestamps, an NTP timestamp is also transported in the RTCP Sender Report (SR) packet. This paper proposes a proper timestamp-related header format for MT E-layer timing model to support media synchronization in MMT system based media service. The proposed time stamping service provides for sender/receiver timing matching for synchronization of several media sources.
- KSP Keywords
- Data packet, Decoding time, E-layer, Media service, Media synchronization, Network Time Protocol, Program Clock Reference(PCR), Sampling instant, Streaming system, Support media, Time Stamping