Invention Grant
US08447003B2 Clock synchronization method for use in communication system for transmitting at least one of video data and audio data
有权
用于在用于发送视频数据和音频数据中的至少一个的通信系统中使用的时钟同步方法
- Patent Title: Clock synchronization method for use in communication system for transmitting at least one of video data and audio data
- Patent Title (中): 用于在用于发送视频数据和音频数据中的至少一个的通信系统中使用的时钟同步方法
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Application No.: US12593416Application Date: 2008-03-24
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Publication No.: US08447003B2Publication Date: 2013-05-21
- Inventor: Akihiro Tatsuta , Makoto Funabiki , Hiroshi Ohue
- Applicant: Akihiro Tatsuta , Makoto Funabiki , Hiroshi Ohue
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2007-083654 20070328
- International Application: PCT/JP2008/000690 WO 20080324
- International Announcement: WO2008/129816 WO 20081030
- Main IPC: H04L7/00
- IPC: H04L7/00
Abstract:
A source device counts a clock CLKpixel for pixel data using a transmitting counter, adds a counted value Csource(t) of the transmitting counter at a timing of transmitting a video packet Pvideo to the sink device to a header part of the video packet Pvideo as a time stamp value Csource(t), and transmits the video packet Pvideo to the sink device. The sink device receives the video packet Pvideo, extracts the time stamp value Csource(t) from the header part of the video packet Pvideo, generates a fixed reference clock CLKref based on the counted value Csource(t) of the transmitting counter using a first PLL, circuit, and generates the clock CLKpixel for the pixel data of the source device based on the reference clock CLKref using a second PLL circuit.
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