Transmission and detection of multi-channel signals in reduced channel format

• US 9,602,785 B2
• Filed: 05/08/2014
• Issued: 03/21/2017
• Est. Priority Date: 01/14/2010
• Status: Active Grant

• Current Assignee: Lattice Semiconductor Corporation
• Original Assignee: Lattice Semiconductor Corporation
• Inventors: Choi, Hoon, Kim, Daekyeung, Yang, Wooseung, Kim, Young II
• Primary Examiner(s): ABAD, FARLEY J
• Application Number:
  US14/273,400
• Publication Number:
  US 20140247889A1
• Time in Patent Office: 1,048 Days
• Field of Search: 710/60
• US Class Current: 1/1
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• CPC Class Codes: G09G 2370/12 Use of DVI or HDMI protocol in interfaces along the display data pipeline
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/90 using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/43635 HDMI
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence

Abstract

Embodiments of the invention are generally directed to transmission and detection of multi-channel signals in reduced channel format. An embodiment of a method for transmitting data includes determining whether a first type or a second type of content data is to be transmitted, where the first type of content data is to be transmitted at a first multiple of a base frequency and the second type of data is to be transmitted at a second multiple of the base frequency. The method further includes selecting one or more channels from a plurality of channels based on the type of content data, clocking a frequency on the first or second multiple of the base frequency according to the type of content data in the selected channels, modifying the content data to fit within a single output channel, and transmitting the modified data via a single output channel at the chosen multiple of the base frequency.

Claims

1. A method for transmitting data comprising:

receiving a first portion of content data via a first channel of a plurality of channels at a base frequency;

receiving a second portion of the content data via a second channel of the plurality of channels at the base frequency;

determining whether the content data to be transmitted is of a first type or a second type, the first type of the content data transmitted at a first frequency and the second type of the content data transmitted at a second frequency;

generating output data by;

responsive to determining that the content data is of the first type, multiplexing the content data in the plurality of channels, and

responsive to determining the content data is of the second type, compressing the second portion of the content data and combining the first portion of the content data and the compressed second portion of the content data, a size of the compressed second portion of the content data smaller than a size of the first portion of the content data; and

transmitting the output data via a single output channel at a frequency corresponding to the determined type of the content data.

2. The method of claim 1, wherein the first frequency is a first integer multiple of the base frequency, and wherein the second frequency is a second integer multiple of the base frequency.

3. The method of claim 1, wherein the content data is compatible with High Definition Multimedia Interface protocol, and the output data is compatible with Mobile High-Definition Link protocol.

4. The method of claim 1, wherein the output data is further generated by omitting a channel of the plurality of channels including a constant data.

5. The method of claim 1, wherein the output data is generated by combining the first portion of the content data, the compressed second portion of the content data, and a compressed third portion of the content data, a combined size of the compressed second portion of the content data and the compressed third portion of the content data substantially similar to the size of the first portion of the content data.

6. A method for receiving data comprising:

receiving the data via an input channel;

determining a type of the received data;

determining a frequency of the received data based on the type of the received data;

decoding the data based on the determined frequency of the received data, a first type of the data to be decoded at a first frequency and a second type of the data to be decoded at a second frequency;

generating a first portion of content data for a first output channel at a base frequency based on a first portion of the decoded data; and

generating a second portion of the content data for a second output channel at the base frequency by;

inserting a constant data, or

decompressing a second portion of the decoded data, a size of the second portion of the decoded data prior to the decompression smaller than a size of the first portion of the decoded data.

7. The method of claim 6, wherein the first frequency is a first integer multiple of the base frequency, and wherein the second frequency is a second integer multiple of the base frequency.

8. The method of claim 6, wherein the content data is compatible with High Definition Multimedia Interface protocol, and the received data is compatible with Mobile High-Definition Link protocol.

9. The method of claim 6, further comprising generating a third portion of the content data for a third output channel at the base frequency by decompressing a third portion of the decoded data, a combined size of the second portion of the decoded data and the third portion of the decoded data prior to the decompression substantially similar to the size of the first portion of the decoded data.

10. The method of claim 6, wherein the type of the data is detected by parsing a preamble field of the received data.

11. A device for comprising:

a receiver configured to receive a first portion of content data via a first channel of a plurality of channels at a base frequency and a second portion of the content data via a second channel of the plurality of channels at the base frequency;

a first logic configured to determine whether the content data to be transmitted is of a first type or a second type, the first type of the content data transmitted at a first frequency and the second type of the content data transmitted at a second frequency;

a second logic configured to generate output data by;

responsive to determining that the content data is of the first type, multiplexing the content data in the plurality of channels, and

responsive to determining the content data is of the second type, compressing the second portion of the content data and combining the first portion of the content data and the compressed second portion of the content data, a size of the compressed second portion of the content data smaller than a size of the first portion of the content data; and

a transmitter configured to transmit the output data via a single output channel at a frequency corresponding to the determined type of the content data.

12. The device of claim 11, wherein the first frequency is a first integer multiple of the base frequency, and wherein the second frequency is a second integer multiple of the base frequency.

13. The device of claim 11, wherein the content data is compatible with High Definition Multimedia Interface protocol, and the output data is compatible with Mobile High-Definition Link protocol.

14. The device of claim 11, wherein the second logic further generates the output data by omitting a channel of the plurality of channels that includes a constant data.

15. The device of claim 11, wherein the second logic generates the output data by combining the first portion of the content data, the compressed second portion of the content data, and a compressed third portion of the content data, a combined size of the compressed second portion of the content data and the compressed third portion of the content data substantially similar to the size of the first portion of the content data.

16. A device comprising:

a receiver configured to receive data via an input channel;

a first logic configured to determine a type of the received data;

a second logic configured to determine a frequency of the received data based on the type of the received data;

a third logic configured to decode the data based on the determined frequency of the received data, a first type of the data to be decoded at a first frequency and a second type of the data to be decoded at a second frequency; and

a fourth logic configured to generate;

a first portion of content data for a first output channel at a base frequency based on a first portion of the decoded data; and

a second portion of the content data for a second output channel at the base frequency by;

inserting a constant data, or

decompressing a second portion of the decoded data, a size of the second portion of the decoded data prior to the decompression smaller than a size of the first portion of the decoded data.

17. The device of claim 16, wherein the first frequency is a first integer multiple of the base frequency, and wherein the second frequency is a second integer multiple of the base frequency.

18. The device of claim 16, wherein the content data is compatible with High Definition Multimedia Interface protocol, and the received data is compatible with Mobile High-Definition Link protocol.

19. The device of claim 16, wherein the fourth logic is further configured to generate a third portion of the content data for a third output channel at the base frequency by decompressing a third portion of the decoded data, a combined size of the second portion of the decoded data and the third portion of the decoded data prior to the decompression substantially similar to the size of the first portion of the decoded data.

20. The device of claim 16, wherein the first logic detects the type of the data by parsing a preamble field of the received data.