Methods circuits devices and systems for wireless communication of video information

• US 20120105729A1
• Filed: 11/01/2010
• Published: 05/03/2012
• Est. Priority Date: 11/01/2010
• Status: Active Grant

• Current Assignee: Amimon Limited (Vitec Group PLC)
• Original Assignee: Amimon Limited (Vitec Group PLC)
• Inventors: Stopler, Daniel, Dorman, Guy, Levinbook, Yonv
• Granted Patent: US 8,792,057 B2
• Time in Patent Office: Days
• US Class Current: 348/723
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4436 Power management, e.g. shutting down unused components of the receiver power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/6181 involving transmission via a mobile phone network arrangements for providing broadcast or conference services to substation in data switching networks in combination with wireless systems H04L12/189; wireless uplink channel access H04W74/004
• CPC Class Codes: H04N 21/632 using a connection between clients on a wide area network, e.g. setting up a peer-to-peer communication via Internet for retrieving video segments from the hard-disk of other client devices broadcast-related systems characterised by transmission among terminal devices H04H60/80; distributed application using peer-to-peer [P2P] networks H04L67/104
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence

Abstract

Disclosed are methods, circuits, devices systems for wireless communication of video information. According to some embodiments, an energy level of one or a group of transmit video block(s) to be transmitted as part of a wireless transmission frame may be adjusted so at to maintain a substantially constant transmission power (e.g. within a range of transmission power levels)

Claims

1. A wireless video source transceiver comprising:

a transmission block generator adapted to convert a set of pixel values into a video transmission block suitable for transmission;

adjustment control logic adapted to determine an energy adjustment factor to be applied to the video transmission block such that transmission power fluctuation of a functionally associated transmitter is mitigated during transmission of the block.

2. The wireless video source transceiver according to claim 1, further comprising a video block energy estimator adapted to estimate an energy level or value for the transmission block.

3. The wireless video source transceiver according to claim 2, wherein said video block energy estimator is further adapted to estimate the energy level of a set of video transmission blocks to be transmitted together.

4. The wireless video source transceiver according to claim 3, wherein said digital control logic is further adapted to determine a common energy adjustment factor to be applied to the set of video transmission blocks.

5. The wireless video source transceiver according to claim 4, wherein the common energy adjustment factor to be applied to the set of video transmission blocks is selected such that a total energy value of the set of blocks is adjusted to a value within a target energy range.

6. The wireless video source transceiver according to claim 5, wherein the target energy range is substantially constant across multiple video transmission block sets.

7. The wireless video source transceiver according to claim 4, wherein said digital control logic is further adapted to determine whether to apply a common energy adjustment factor to a given video transmission block in the set based on an output of said video block energy estimator.

8. The wireless video source transceiver according to claim 1, wherein values within two or more video transmission blocks are transposed or scrambled such that energy value deviations across the two or more video transmission blocks is mitigated.

9. The wireless video source transceiver according to claim 1, further comprising a transmitter adapted to transmit a set of video transmission blocks, wherein transmission of a given set of blocks includes transmission of information relating to energy value adjustments performed on one or more video transmission blocks in the set.

10. The wireless video source transceiver according to claim 9, wherein transmission of a given set of blocks includes transmission of information relating to a common gain factor associated with the set of blocks.

11. A wireless video sink transceiver comprising:

a receiver adapted to receive a set of video transmission blocks along with an indicator indicating whether a given received video transmission block within the was digitally adjusted by a factor; and

a video block energy adjustor adapted to adjust an energy level of the given received video transmission block.

12. The wireless video sink transceiver according to claim 11, wherein said video block energy adjustor is adapted to reverse the energy adjustment performed on the given block.

13. A wireless video sink transceiver according to claim 12, wherein the indicator is for a common factor of the set of blocks.

14. A wireless video sink transceiver according to claim 13, wherein the indicator further includes information about which blocks in the set were adjusted by the common factor.

15. The wireless video sink transceiver according to claim 14, wherein said video block energy adjustor is adapted to perform reverse energy adjustment on blocks adjusted by the common factor.

16. The wireless video sink transceiver according to claim 11, further including a pixel value generator adapted to convert a received and energy adjusted transmission block into a set of pixel values suitable for a video sink.

17. A method of wireless video transmission comprising:

converting a set of pixel values into a video transmission block suitable for transmission;

determining an energy adjustment factor to be applied to the video transmission block such that transmission power fluctuation of a functionally associated transmitter is mitigated during transmission of the block.

18. The method according to claim 17, further comprising estimating an energy value for the transmission block.

19. The method according to claim 18, further comprising estimating the energy level of a set of video transmission blocks to be transmitted together.

20. The method according to claim 19, determining a common energy adjustment factor to be applied to the set of video transmission blocks.

21. The method according to claim 20, wherein the common energy adjustment factor to be applied to the set of video transmission blocks is selected such that a total energy value of the set of blocks is adjusted to a value within a target energy range.

22. The method according to claim 21, wherein the target energy range is substantially constant across multiple video transmission block sets.