Point-to-multipoint high definition multimedia transmitter and receiver

• US 7,992,177 B2
• Filed: 09/07/2007
• Issued: 08/02/2011
• Est. Priority Date: 09/07/2006
• Status: Expired due to Fees

• Current Assignee: Avocent Huntsville Corporation (Vertiv Holdings Co.)
• Original Assignee: Avocent Huntsville Corporation (Vertiv Holdings Co.)
• Inventors: Perry, Jedd, Fore, Jeff, Reyes, Luis, Lo, Lawrence, Hoskyn, John, Straub, Mike, Wong, Edwin, Schuettpelz, Keith, Kent, Phil, Mills, Karl, Pursel, James, Collins, Doug, Wirth, Wes, Seifert, Bob, Reed, John
• Primary Examiner(s): Lonsberry; Hunter B.
• Assistant Examiner(s): Marandi; James R
• Application Number:
  US11/896,970
• Publication Number:
  US 20080172708A1
• Time in Patent Office: 1,425 Days
• Field of Search: None
• US Class Current: 725/81
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements

Abstract

A high definition video transmitter and receiver are disclosed. The transmitter provides high definition video to a one-point receiver or to multipoint receivers. The transmission network is asynchronous and the receiver re-synchronizes the video. The transmission can be wired or wireless.

Claims

1. A system for communicating high definition video, comprising:

a transmitter, including;

a video receiver to receive original video from a video source and to output information identifying the original video in a predetermined video format;

a transmitter-side bus;

a transmitter-side channel communicating with the transmitter-side bus;

a video encoder receiving the information identifying the original video in the predetermined video format from the video receiver and outputting new information identifying the original video in a compressed format;

a transmitter-side programmed logic device receiving the new information identifying the original video in the compressed format, time-stamping the new information identifying the original video in the compressed format by placing a time-stamp in an associated packet header, and placing the time-stamped new information identifying the original video in the compressed format onto the transmitter-side bus and to the transmitter-side channel; and

a transmitter-side clock producing clock information communicated to the transmitter-side bus, the clock information being periodically packeted as control information and provided to the transmitter-side channel;

multiple receivers to simultaneously communicate with the transmitter, each including;

a receiver-side bus;

a receiver-side channel communicating with the receiver-side bus and with the transmitter-side channel asynchronously as to the others of the multiple receivers, the receiver-side channel to receive the new information identifying the original video in the compressed format from the transmitter-side channel and to place the new information identifying the original video in the compressed format onto the receiver-side bus;

a receiver-side clock periodically calibrated to the transmitter-side clock using the clock information packeted as control information and provided to the receiver-side channel via the transmitter-side channel;

a receiver-side programmed logic device to read the new information identifying the original video in the compressed format from the receiver-side bus, reading the time-stamping of the new information identifying the original video in the compressed format, and (1) if the time-stamping information of the new information is larger than the receiver-side clock, buffering the new information identifying the original video in the compressed format and (2) if the time-stamping information of the new information is smaller than the receiver-side clock, discarding the new information identifying the original video in the compressed format;

a video decoder receiving the buffered new information identifying the original video in the compressed format from the receiver-side programmed logic device and decompressing the new information into a decoded format of information identifying the original video;

a high definition display port for communication with a high definition display; and

a video transmitter to receive the decoded format of information identifying the original video, to convert the decoded format of information identifying the original video to a high definition format of information identifying the original video, and outputting the high definition format of information identifying the original video to the high definition display port.

2. A system according to claim 1, wherein the transmitter-side and receiver-side channels are wireless channels.

3. A system according to claim 1, wherein the transmitter-side and receiver-side channels are packet-switched network ports.

4. A system according to claim 1, wherein:

the transmitter has an assigned unique address associated with the transmitter-side channel and each receiver has an assigned unique address associated with its receiver channel, the transmitter packets the time-stamped new information identifying the original video in the compressed format and addresses the packeted time-stamped new information identifying the original video in the compressed format to selected ones of the receiver channels.

5. A system according to claim 1, wherein the transmitter has a transmitter-side packet-switched network port communicating with the transmitter-side programmed logic device, and each receiver has a receiver-side packet-switched network port communicating with the receiver-side programmed logic device, the transmitter-side programmed logic device and each receiver-side programmed logic device providing users with Web pages via, respectively, the transmitter-side packet-switched network port and each receiver-side packet-switched network port, the Web pages providing the user with executable configuration options for the system.

6. A system according to claim 1, wherein the transmitter-side programmed logic device and the receiver-side programmed logic device each include an operating system with bus support for respectively, the transmitter-side bus and receiver side bus;

network stacks;

channel drivers for, respectively, the transmitter-side channel and receiver-side channel; and

a Web server.

7. A system according to claim 1, wherein the video source provides consumer electronics control codes, and the transmitter provides the consumer electronics control codes to selected ones of the multiple receivers via one of an Ethernet channel or a wireless channel.

8. A system according to claim 7, wherein the transmitter provides the consumer electronics control codes to the selected ones of the multiple receivers without modification.

9. A system according to claim 7, wherein the transmitter provides the consumer electronics control codes to the selected ones of the multiple receivers from the transmitter-side channel to the receiver-side channel.

10. A system according to claim 1, wherein the transmitter has an infrared transceiver and the transmitter provides infrared transceiver codes to selected ones of the multiple receivers.

11. A system according to claim 10, wherein the transmitter provides the infrared transceiver codes to selected ones of the multiple receivers from the transmitter-side channel to the receiver-side channel.

12. A system according to claim 1, wherein the transmitter further receives audio corresponding to the original video, the transmitter-side programmed logic device transmitting the audio information corresponding to the audio after time-stamping the audio information, the receiver-side programmed logic device receiving the audio information and extracting the time-stamping of the audio information, and the receiver further outputting the audio synchronized to the output of the original video based on the time-stamping of the audio information and the time-stamping of the time-stamped new information identifying the original video.

13. A system according to claim 12 wherein the receiver further outputs the audio synchronized to the output of the original video based on the time-stamping of the audio information with respect to a particular frame, the time-stamping of the time-stamped new information identifying the original video with respect to the particular frame, and the receiver-side clock.

14. A system according to claim 1, wherein the receiver-side programmed logic devices of the multiple receivers read the new information identifying the original video in the compressed format from corresponding ones of the receiver-side buses, read the time-stamping of the new information, and using the time-stamping of the new information effectively synchronize themselves relative to each other and to the transmitter.

15. A system according to claim 12, wherein each of the multiple receivers provides audio playback delay for the audio information and, independently of the audio playback delay, video playback delay for the original video.

16. A method of communicating media information, comprising:

receiving video information from a video source;

receiving audio information corresponding to the video information from an audio source;

packeting the video information;

packeting the audio information;

adding a header to the packeted video information with time-stamp information;

adding a header to the packeted audio information with time-stamp information;

packeting control codes for at least one of the audio and video information;

transmitting the packeted video information with corresponding time-stamp information, packeted audio information with corresponding time-stamp information, packeted control codes, and a transmission-side clock to multiple receivers;

simultaneously at the multiple receivers receiving the transmitting the packeted video information with corresponding time-stamp information, packeted audio information with corresponding time-stamp information, packeted control codes, and a transmission-side clock;

using the transmitted transmission-side clock, independently synchronizing the video information to the audio information using the corresponding time-stamp information of the packet video information and the corresponding time-stamp information of the audio video information,

in each of the multiple receivers, reproducing on associated visible media the synchronized video information and in associated audible media the synchronized audio information and, using the transmitted transmission-side clock, effectively synchronizing the reproductions of the synchronized video information and synchronized audio information among the multiple receivers.

17. A method according to claim 16, wherein the steps of transmitting and simultaneously receiving are performed wirelessly.

18. A method according to claim 16, wherein the control codes are consumer electronics control codes, and wherein the consumer electronics control codes are packeted for transmission without modification.

19. A method according to claim 16, wherein the control codes are infrared transceiver codes, and wherein the infrared transceiver codes are packeted for transmission without modification.

20. A method according to claim 16, wherein the step of transmitting includes the step of uniquely addressing the packeted video information, packeted audio information, packeted control codes, and transmission-side clock to the multiple receivers.