Multimedia information processing system

• US 5,930,251 A
• Filed: 11/08/1996
• Issued: 07/27/1999
• Est. Priority Date: 02/01/1996
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Murakami, Tokumichi, Kato, Yoshiaki, Matsuzaki, Kazuhiro, Ohira, Hideo
• Primary Examiner(s): Pham, Chi H.
• Assistant Examiner(s): YAO, KWANG BIN
• Application Number:
  US08/751,770
• Time in Patent Office: 991 Days
• Field of Search: 370/389, 370/392, 370/395, 370/396, 370/397, 370/398, 370/399, 370/400, 370/474, 370/532, 370/536, 370/542, 348/13, 348/16, 348/6, 348/7, 348/8, 348/9, 348/10, 348/461, 348/462, 348/465, 348/467
• US Class Current: 370/395.65
• CPC Class Codes: H04L 2012/561 Star, e.g. cross-connect, concentrator, subscriber group equipment, remote electronics
• CPC Class Codes: H04L 2012/5616 Terminal equipment, e.g. codecs, synch.
• CPC Class Codes: H04L 2012/5638 Services, e.g. multimedia, GOS, QOS
• CPC Class Codes: H04L 2012/5652 Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

In a multimedia information processing system, a relay station comprises: transmission decoding section for reproducing a fixed packets stream from received transmission signal from a transmitter; signal change processing means for executing changing process for the fixed packets stream; and transmission coding section for producing a transmission signal corresponding to a characteristic of a transmission line from the fixed packets stream. The construction for exchanging signals between different transmission means is simplified. Thus, it is achieved to exchange contents of media between different transmission means by a simple construction.

Claims

1. A multimedia information processing system for facilitating transmission of multimedia information over different types of transmission media, comprising:

information-source coding processing means including a plurality of different coding sections, each coding section inputting one of a plurality of media information of different types, each coding section independently coding each type of media information regardless of and independent to the type of transmission media utilized to transmit the media information, wherein each type of media information is to be transmitted on one of the different types of transmission media;

packet multiplexing means for producing a multiplexed stream by packet-multiplexing coded bit streams produced by said information-source coding processing means, wherein each of the coded bit streams is independent to the other coded bit streams;

fixed length packet producing means for allocating said multiplexed stream into fixed length packets; and

transmission coding means for producing a transmission signal from said fixed length packets,

said transmission coding means coding the transmission signal in a manner depending upon the corresponding type of transmission medium.

2. The multimedia information processing system according to claim 1, wherein said fixed length packet producing means allocates the multiplexed stream into an ATM cell.

3. The multimedia information processing system according to claim 2, wherein said transmission coding means executes transmission processing of ATM physical layer.

4. The multimedia information processing system according to claim 1, wherein said transmission coding means executes transmission processing of ATM physical layer.

5. A multimedia information processing system for facilitating transmission of multimedia information over different transmission media, comprising:

information-source coding processing means including a plurality of different coding sections, each coding section inputting one of a plurality of media information of different types, each coding section independently coding each type of media information regardless of and independent to the type of transmission media utilized to transmit the media information, wherein each type of media information is to be transmitted on one of the different types of transmission media;

packet multiplexing means for producing a multiplexed stream by packet-multiplexing coded bit streams produced by said information-source coding processing means, wherein each of the coded bit streams is independent to the other coded bit streams;

fixed length packet producing means for allocating said multiplexed stream into fixed length packets;

transmission coding means for producing a transmission signal from said fixed length packets,

said transmission coding means coding the transmission signal in a manner depending upon the corresponding type of transmission medium,

wherein the system receives transmission signals over the different types of transmission media;

transmission decoding means for reproducing fixed packet streams from the received transmission signal;

wherein the received transmission signals encode a plurality of media information of different types and wherein each type of media is received over one of the different transmission media;

said transmission decoding means reproducing fixed packet streams in a manner depending upon the type of transmission media utilized to transmit the corresponding transmission signals;

fixed length packet disassembling means for disassembling said fixed packet streams to extract payloads and reproduce a multiplexed stream;

media separating means for reproducing coded bit streams for respective types of media from said multiplexed stream, wherein each of the coded bit streams is independent to other coded bit streams; and

information-source decoding processing means for decoding said coded bit streams for respective types of media.

6. The multimedia information processing system according to claim 5, wherein said fixed length packet disassembling means extracts the multiplexed stream from an ATM cells stream.

7. The multimedia information processing system according to claim 5, wherein said transmission decoding means executes receive processing of ATM physical layer.

8. The multimedia information processing system according to claim 6, wherein said transmission decoding means executes receive processing of ATM physical layer.