Data transmission terminal apparatus and data transmission method

• US 20060104311A1
• Filed: 11/15/2005
• Published: 05/18/2006
• Est. Priority Date: 11/16/2004
• Status: Abandoned Application

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: Iwai, Tomoaki, Nohara, Manabu, Soga, Yusuke
• Application Number:
  US11/272,760
• Publication Number:
  US 20060104311A1
• Time in Patent Office: Days
• US Class Current: 370/503
• CPC Class Codes: G09G 2370/10 Use of a protocol of communication by packets 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 21/23611 Insertion of stuffing data into a multiplex stream, e.g. to obtain a constant bitrate synchronisation arrangements in time-division multiplex systems using bit stuffing for systems with different or fluctuating information rates H04J3/073
• CPC Class Codes: H04N 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• CPC Class Codes: H04N 21/242 Synchronization processes, e.g. processing of PCR [Program Clock References] arrangements for synchronising broadcast or distribution via plural systems in broadcast distribution systems H04H20/18
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams

Abstract

A data transmission terminal apparatus and a data transmission method for maintaining a data transmission between the terminals irrespective of the state of a clock signal associated with a transmission data packet. The data transmission terminal apparatus multiplexes an image data signal and an other data signal to generate a data packet synchronized to a reference clock signal included in the image data signal, and relays the generated data packet to a transmission path. The apparatus comprises a first packet generating part for multiplexing the image data signal and the other data signal to generate an image data packet, a second packet generating part for multiplexing the other data signal and dummy data to generate a dummy data packet, a clock monitoring part for monitoring the reference clock signal to generate a state indicating signal indicative of the state of the reference clock signal, and an output relaying part for switching between the image data packet and the dummy data packet in accordance with the state indicating signal for relaying to the transmission path.

Claims

1. A data transmission terminal apparatus for multiplexing an image data signal and an other data signal to generate a data packet synchronized to a reference clock signal included in the image data signal, and relaying the generated data packet to a transmission path, said apparatus comprising:

a first packet generating part for multiplexing the image data signal and the other data signal to generate an image data packet;

a second packet generating part for multiplexing the other data signal and dummy data to generate a dummy data packet;

a clock monitoring part for monitoring the reference clock signal to generate a state indicating signal indicative of the state of the reference clock signal; and

an output relaying part for switching between the image data packet and the dummy data packet in accordance with the state indicating signal for relaying to the transmission path.

2. A data transmission terminal apparatus according to claim 1, wherein said image data packet can be adjusted in packet length in accordance with the frequency of the reference clock signal, and said dummy data packet has a predetermined packet length.

3. A data transmission terminal apparatus according to claim 1, wherein said other data signal is a monitoring control signal indicative of an operating state within said apparatus.

4. A data transmission terminal apparatus according to claim 2, wherein said other data signal is a monitoring control signal indicative of an operating state within said apparatus.

5. A data transmission terminal apparatus according to claim 1, wherein said reference clock signal is a transmission pixel clock included in the image data signal.

6. A data transmission terminal apparatus according to claim 2, wherein said reference clock signal is a transmission pixel clock included in the image data signal.

7. A data transmission terminal apparatus according to claim 3, wherein said reference clock signal is a transmission pixel clock included in the image data signal.

8. A data transmission terminal apparatus according to claim 4, wherein said reference clock signal is a transmission pixel clock included in the image data signal.

9. A data transmission method for multiplexing an image data signal and an other data signal to generate a data packet synchronized to a reference clock signal included in the image data signal, and relaying the generated data packet to a transmission path, said method comprising the steps of:

multiplexing the image data signal and the other data signal to generate an image data packet;

multiplexing the other data signal and dummy data to generate a dummy data packet;

monitoring the reference clock signal to generate a state indicating signal indicative of the state of the reference clock signal; and

switching between the image data packet and the dummy data packet in accordance with the state indicating signal for relaying to the transmission path.