Transmission And Detection Of Multi-Channel Signals In Reduced Channel Format

• US 20170180791A1
• Filed: 03/08/2017
• Published: 06/22/2017
• Est. Priority Date: 01/14/2010
• Status: Active Grant

• Current Assignee: Lattice Semiconductor Corporation
• Original Assignee: Lattice Semiconductor Corporation
• Inventors: Kim, Daekyeung, Kim, Young Il, Choi, Hoon, Yang, Wooseung
• Granted Patent: US 10,448,090 B2
• Time in Patent Office: Days
• 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 comprising:

receiving video data from a first device via a plurality of channels at a first frequency during a video data period;

generating first data from the video data including first bits of the video data but excluding second bits of the video data;

transmitting the first data to a second device over a single channel at a second frequency higher than the first frequency;

receiving control data from the first device via the plurality of channels at the first frequency during a control period;

generating second data from the control data, the second data excluding fixed data of the control data that remain unchanged during the control period; and

transmitting the second data to the second device over the single channel at the second frequency.

2. The method of claim 1, wherein the second bits of the video data are received from a channel of the plurality of channels, and the first bits of the video data are received from other channels of the plurality of channels.

3. The method of claim 1, wherein the excluded second bits are lower bits of luminance and chrominance components of the video data.

4. The method of claim 1, wherein the excluded fixed data of the control data are received from a channel of the plurality of channels, and non-excluded data of the control data are received from other channels of the plurality of channels.

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

6. The method of claim 1, further comprising:

receiving data island data from the first device via the plurality of channels at the first frequency during a data island data period;

generating third data from the data island data by;

compressing data from two input channels of the plurality of channels for an intermediate channel, and

multiplexing the compressed data from the intermediate channel and data from another input channel of the plurality of channels; and

transmitting the third data to the second device over the single channel at the second frequency.

7. The method of claim 1, wherein the video data and the control data are compatible with High Definition Multimedia Interface protocol, and the first data and the second data are compatible with Mobile High-Definition Link protocol.

8. A method comprising:

receiving first data corresponding to video data from a first device through a single channel at a first frequency;

obtaining, from the first data, first bits of the video data;

generating second bits of the video data irrespective of the first data;

transmitting the first bits of the video data to a second device over a plurality of channels at a second frequency lower than the first frequency during a video data period;

receiving second data corresponding to control data from the first device through the single channel at the first frequency;

obtaining, from the second data, a first portion of the control data;

generating a second portion of the control data including fixed data irrespective of the second data; and

transmitting the first portion of the control data to the second device over a plurality of channels at the second frequency.

9. The method of claim 8, wherein the first bits of the video data are transmitted through a first output channel of the plurality of channels and the second bits of the video data are transmitted through a second output channel of the plurality of channels, and wherein the first portion of the control data are transmitted through one of the plurality of channels and the second portion of the control data are transmitted through another of the plurality of channels.

10. The method of claim 8, wherein the second bits of the video data generated irrespective of the first data are lower bits of luminance and chrominance components of the video data.

11. The method of claim 8, wherein the first frequency is a first integer multiple of a base frequency, and wherein the second frequency is a second integer multiple of the base frequency.

12. The method of claim 8, further comprising:

receiving third data corresponding to data island data from the first device through the single channel at the first frequency;

de-multiplexing the third data into a first portion of the data island data and a second portion of the data island data, the first portion being compressed and the second portion being not compressed;

decompressing the first portion of the data island data into first decompressed data and second decompressed data; and

transmitting the first decompressed data, the second decompressed data, and the second portion of the data island data through the plurality of channels at the second frequency.

13. The method of claim 12, wherein the first decompressed data, the second decompressed data, and the second portion of the data island data are transmitted to the second device through different channels.

14. The method of claim 8, wherein the video data and the control data are compatible with High Definition Multimedia Interface protocol, and the first data and the second data are compatible with Mobile High-Definition Link protocol.

15. A device comprising:

a receiver configured to;

receive video data from a first device via a plurality of channels at a first frequency during a video data period, and

receive control data from the first device via the plurality of channels at the first frequency during a control period;

a logic configured to generate output data by;

generate first data from the video data including first bits of the video data but excluding second bits of the video data, and

generate second data from the control data, the second data excluding fixed data of the control data that remain unchanged during the control period; and

a transmitter configured to;

transmit the first data to a second device over a single channel at a second frequency higher than the first frequency, and

transmit the second data to the second device over the single channel at the second frequency.

16. The device of claim 15, wherein the second bits of the video data are received from a channel of the plurality of channels, and the first bits of the video data are received from other channels of the plurality of channels.

17. The device of claim 15, wherein the excluded second bits are lower bits of luminance and chrominance components of the video data.

18. The device of claim 15, wherein the excluded fixed data of the control data are received from a channel of the plurality of channels, and non-excluded data of the control data are received from other channels of the plurality of channels.

19. The device of claim 15, wherein the first frequency is a first integer multiple of a base frequency, and wherein the second frequency is a second integer multiple of the base frequency.

20. The device of claim 15, wherein:

the receiver is further configured to receive data island data from the first device via the plurality of channels at the first frequency during a data island data period,

the logic is further configured to generate third data from the data island data by;

compressing data from two input channels of the plurality of channels for an intermediate channel, and

multiplexing the compressed data from the intermediate channel and data from another input channel of the plurality of channels, and

the transmitter is further configured to transmit the third data to the second device over the single channel at the second frequency.