Local video and audio network with optical data line

• US 7,451,471 B1
• Filed: 12/15/1999
• Issued: 11/11/2008
• Est. Priority Date: 12/18/1998
• Status: Expired due to Fees

• Current Assignee: XSYS Interactive Research GmbH
• Original Assignee: Harman Becker Automotive Systems GmbH (Samsung Electronics Co. Ltd.)
• Inventors: Schöpp, Harald, Teichner, Detlef, Geiger, Erich A.
• Primary Examiner(s): BUI, KIEU OANH T
• Application Number:
  US09/857,474
• Time in Patent Office: 3,254 Days
• Field of Search: 725/75, 725/80, 725/98, 725/118, 725/148, 725/85, 725/109, 725/110, 725/131, 370/395, 370/503, 709/231, 709/232, 709/203, 709/217, 709/218, 709/219
• US Class Current: 725/75
• CPC Class Codes: H04B 1/205 with control bus for exchanging commands between units
• CPC Class Codes: H04L 12/42 Loop networks

Abstract

An optical ring network for use, for example, in a motor vehicle, includes an optical data line that defines a ring network, a playback transducer and at least one data source connected to the optical data line, where the data source provides compressed data onto the optical data line. The network also includes at least one data sink connected to the optical data line, which receives the compressed data from the optical data line. The data sink includes a bit stream decoder that decompresses the received compressed data and provides the decompressed data to the playback transducer. The local network transmits audio and video data in compressed form via the data line, and has a single bit stream decoder, centrally situated at the respective data sink, for decompressing the audio and/or video data. As a result, the individual data sources no longer need their own bit stream decoder for decompressing the data. By the assignment of such a bit stream decoder centrally to the relevant data sink, the components of the individual subscribers are distributed in a more efficient manner within the network, which better utilizes the available data transmission capacity of the network, due also to the transmission of compressed data instead of decompressed data. Overall costs of the network are also reduced.

Claims

1. A motor vehicle optical ring network, comprising:

an optical data line configured in a ring network and having a plurality of data channels;

a plurality of data sources each connected to the optical data line, where each of the plurality of data sources provides compressed multimedia data onto the optical data line and each of the plurality of data sources is free of decoders that provide decompressed multimedia data onto the optical data line; and

at least one data sink connected to the optical data line and comprising a video display device, and that receives the compressed multimedia data from the optical data line, where the data sink includes a bit stream decoder to decompress the received compressed multimedia data and provide (i) a decompressed video data signal indicative thereof to the video display device and (ii) a decompressed audio signal;

where the at least one data sink also includes a control unit that selectively adapts the decompression of the received compressed multimedia data by the bit stream decoder based upon the compression format of the received compressed multimedia data, where the format of the received compressed multimedia data may be one of a plurality of compression formats, where the control unit also controls the data channels of the optical data line for transmitting the compressed data between the data sources and the data sink.

2. The motor vehicle optical ring network of claim 1, where the bit stream decoder includes an MPEG decoder, a JPEG decoder and an AC-3 decoder.

3. The motor vehicle optical ring network of claim 1, where the at least one data source comprises a DVD player connected to the optical data line and provides the compressed multimedia data onto the optical data line.

4. The motor vehicle optical ring network of claim 3, where the bit stream decoder is selectively configured as one of an MPEG decoder and an AC-3 decoder in response to control signal data received by the bit stream decoder over the optical data line.

5. The motor vehicle optical ring network of claim 1, further comprising a second data source including a radio receiver that provides compressed audio data onto the optical data line.

6. An optical ring network for a motor vehicle multimedia system, comprising:

an optical data line configured as a ring network and having a plurality of data channels;

a first data source comprising a radio receiver, which is connected to the optical data line, and provides compressed audio data onto the optical data line;

a second data source that is connected to the optical data line, and provides compressed multimedia data onto the optical data line, where each of the first and second data sources is free of decoders that provide decompressed multimedia data onto the optical data line; and

at least one data sink that includes a video display device and is connected to the optical data line, and that receives the compressed multimedia data, where the at least one data sink includes a bit stream decoder to decompress the received compressed multimedia data and provide (i) a decompressed video data signal indicative thereof for display by the video display device, and (ii) a decompressed audio signal to a loudspeaker, and where the at least one data sink includes a control unit that selectively adapts the decompression of the received compressed multimedia data to a format of the received compressed multimedia data, where the format of the received compressed multimedia data includes one of a plurality of compression formats, where the control unit also controls the data channels of the optical data line for transmitting the compressed data between the data sources and the data sink.

7. The optical ring network of claim 6, where the bit stream decoder decodes MPEG and AC-3 data.

8. The optical ring network of claim 6, where the first bit stream decoder decodes MPEG and JPEG data.

9. The optical ring network of claim 6, where the second data source includes a digital video disc (DVD) player.

10. A motor vehicle network, comprising:

a ring network having a plurality of data channels;

a first one data source connected within the ring network, and provides compressed multimedia data within the ring network;

a second data source connected within the ring network, where the second data source comprises a radio receiver that provides a received radio signal to an encoder that provides compressed audio data indicative thereof within the ring network, where each of the first and second data sources is free of decoders that provide decompressed multimedia data onto the ring network;

a first data sink comprising a video display device and connected within the ring network, and that receives the compressed multimedia data from within the ring network, where the first data sink includes a bit stream decoder to decompress the received compressed multimedia data and provide corresponding decompressed video data to the video display device; and

a second data sink connected within the ring network, and which receives the compressed audio data and provides decompressed audio data indicative thereof;

where the first data sink includes a control unit that selectively adapts the decompression of the received compressed multimedia data by the bit stream decoder based upon the compression format of the received compressed multimedia data, and the control unit also controls the data channels of the ring network for transmitting the compressed data between the data sources and the data sink.

11. The motor vehicle network of claim 10, further comprising a loudspeaker that receives the decompressed audio data.

12. The motor vehicle network of claim 10, where the bit stream decoder comprises an MPEG decoder.