Device, method and system for transmitting video data between a video source and a video sink

• US 8,855,192 B2
• Filed: 01/19/2010
• Issued: 10/07/2014
• Est. Priority Date: 09/05/2007
• Status: Active Grant

• Current Assignee: Amimon Limited (Vitec Group PLC)
• Original Assignee: Amimon Limited (Vitec Group PLC)
• Inventors: Sagi, Ariel
• Primary Examiner(s): Kim, Hee-Yong
• Application Number:
  US12/656,112
• Publication Number:
  US 20100123826A1
• Time in Patent Office: 1,722 Days
• Field of Search: 375/240.01, 370/468, 345/214
• US Class Current: 375/240.01
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 2012/2849 Audio/video appliances
• CPC Class Codes: H04L 65/61 for supporting one-way streaming services, e.g. Internet radio
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114

Abstract

Disclosed is a method, circuit and system for transmission of video data between a video source and a video sink. A video source transceiver may include: (1) a video source interface for receiving video data, optionally including one or more video synchronization signals functionally associated video source device; (2) a video source clock sampler for sampling a video clock parameter of received video data; (3) a video data buffer for buffering received video data prior to transmission; and (4) a video transmission circuit including packet size timing logic adapted to generate and transmit to a functionally associated video sink transceiver a value correlated to an expected data packet size based on video data stored in the video buffer. A video sink transceiver may include: (1) a video reception circuit adapted to receive a transmitted data packet, including one or more values generated by the packet size timing logic, and to regenerate a video frame; (2) video sync signal generation logic adapted to regenerate one or more video frame synchronization signals based on the one or more values generated by the video transmission circuit, and (3) a video sink interface for forwarding received video data, including one or more video clock and/or synchronization signals to a functionally associated video sink device.

Claims

1. A video source wireless transceiver comprising:

a video source interface adapted to receive video data from a functionally associated video source;

a video source clock sampler for sampling a current video clock parameter of a received first video data packet, wherein said current video clock parameter is at least partially used to estimate transmission timing of a second video data packet to be transmitted to a video sink wireless transceiver; and

a transmission circuit adapted to transmit to the video sink wireless transceiver information regarding an expected time of arrival for the second video data packet at the video sink wireless transceiver;

wherein the second video data packet is prepared to be sent substantially after the information regarding an expected arrival time is transmitted.

2. The video source transceiver according to claim 1, further comprising an audio clock sampler for sampling an audio clock parameter of audio data received along with the video data, and wherein said transmission circuit is adapted to transmit the audio data along with information regarding the sampled audio clock parameter.

3. The video source transceiver according to claim 2, wherein either the sampled current video clock parameter or the sampled audio clock parameter is a phase of the clock.

4. The video source transceiver according to claim 1, further comprising a video data buffer adapted to store video data received from a video source, and further comprising packet size timing logic adapted to generate and transmit to a functionally associated video sink transceiver a value correlated to an expected data packet size based on video data stored in the video buffer.

5. The video source transceiver according to claim 4, further adapted to generate and transmit to a functionally associated video sink transceiver a countdown message correlated to an expected time of arrival of a data packet.