Video transmission apparatus

• US 5,991,313 A
• Filed: 04/04/1997
• Issued: 11/23/1999
• Est. Priority Date: 05/24/1996
• Status: Expired due to Fees

• Current Assignee: TOKO Incorporated (Murata Manufacturing Co Limited)
• Original Assignee: TOKO Incorporated (Murata Manufacturing Co Limited)
• Inventors: Tanaka, Hiroshi, Sato, Kazuma, Kawazoe, Masaru, Shimamura, Fumito, Honma, Ryoichi
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Pezzlo, John
• Application Number:
  US08/833,339
• Time in Patent Office: 963 Days
• Field of Search: 370/535, 370/538, 370/543, 370/522, 370/490, 370/493, 370/537, 370/542, 370/474, 370/468, 370/204, 348/7, 348/13, 455/3.2, 455/4.2, 455/5.1
• US Class Current: 370/537
• CPC Class Codes: H04B 7/18523 Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service arrangements specially adapted for satellite broadcast receiving H04H40/90; picture transmission via satellite H04N1/00103; television transmission via satellite H04N7/20
• CPC Class Codes: H04J 3/22 in which the sources have different rates or codes simultaneous speech and digital data or video transmission H04M11/06; see provisional also H04J3/16
• CPC Class Codes: H04N 21/2368 Multiplexing of audio and video streams
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/4341 Demultiplexing of audio and video streams
• CPC Class Codes: H04N 21/6137 involving transmission via a telephone network, e.g. POTS
• CPC Class Codes: H04N 21/6143 involving transmission via a satellite
• CPC Class Codes: H04N 21/6187 involving transmission via a telephone network, e.g. POTS
• CPC Class Codes: H04N 21/6193 involving transmission via a satellite arrangements for data linking, networking or transporting, or for controlling an end to end session in a satellite broadcast system H04B7/18526
• CPC Class Codes: H04N 21/8106 involving special audio data, e.g. different tracks for different languages

Abstract

A video transmission apparatus comprises video codec for compression-encoding video data to be transmitted and decompression-decoding video data as received; a first audio codec for compression-encoding first audio data to be transmitted and decompression-decoding first audio data as received; a second audio codec for compression-encoding second audio data to be transmitted and decompression-decoding second audio data as received; a multiplexer-demultiplexer for including a three-channel buffer memory and processor; and an interface connectable to communications satellite network and ground network. In the multiplexer-demultiplexer, video data-first audio data and second audio data to be transmitted are multiplexed and converted to a packet based on a predetermined communication format, and packet as received is separated into video data-first audio data, and second audio data.

Claims

1. A video transmission apparatus equipped with functions of transmitter-receiver and arranged to effect inputting and outputting of image data consisting of video data and first audio data, and second audio data for realizing telephone function, the improvement comprising:

a video codec for compression-encoding video data to be transmitted and decompression-decoding video data as received;

a first audio codec for compression-encoding first audio data to be transmitted and decompression-decoding first audio data as received;

a second audio codec for compression-encoding second audio data to be transmitted and decompression-decoding second audio data as received;

a multiplexer-demultiplexer for including a three-channel buffer memory and processor; and

an interface connectable to communications satellite network and ground network,

wherein in the multiplexer-demultiplexer, video data-first audio data and second audio data to be transmitted are multiplexed and converted to a packet based on a predetermined communication format, and packet as received is separated into video data-first audio data, and second audio data.

2. A video transmission apparatus equipped with functions of transmitter-receiver and arranged to effect inputting and outputting of image data consisting of video data and first audio data, and second audio data for realizing telephone function, the improvement comprising:

a video codec for compression-encoding video data to be transmitted and decompression-decoding video data as received;

a first audio codec for compression-encoding first audio data to be transmitted and decompression-decoding first audio data as received;

a second audio codec for compression-encoding second audio data to be transmitted and decompression-decoding second audio data as received;

a multiplexer-demultiplexer for including a three-channel buffer memory and processor; and

an interface connectable to communications satellite network and ground network, wherein;

in the multiplexer-demultiplexer, video data-first audio data and second audio data to be transmitted are multiplexed and converted to a packet based on a predetermined communication format, and packet as received is separated into video data-first audio data and second audio data;

at transmitting site, through use of said three-channel buffer memory, flag bit for data discrimination is added to data bit for each of said video data and first audio data and said second audio data; and

the data are multiplexed and converted to packet in said processor; and

at receiving site, through use of said three-channel buffer memory, said packet is separated into the respective data based on said flag bit in said processor;

timing position between the video data and the audio data is adjusted, thereby making possible transmission and reception of second audio data even during transmission of video data and first audio data.