Process and device for playing back multimedia data in a motor vehicle

• US 8,594,884 B2
• Filed: 09/26/2005
• Issued: 11/26/2013
• Est. Priority Date: 10/22/2004
• Status: Active Grant

• Current Assignee: Continental Automotive GmbH (Continental AG)
• Original Assignee: Siemens AG
• Inventors: Hamperl, Helmut, Lindenthal, Andreas
• Primary Examiner(s): KWIECINSKI, RYAN D
• Application Number:
  US11/665,941
• Publication Number:
  US 20090059100A1
• Time in Patent Office: 2,983 Days
• Field of Search: 701/1, 701/36, 348836-843
• US Class Current: 701/36
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8063 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

A process and device are disclosed for playing back multimedia data in a motor vehicle. A digital multiplexed audio-video data stream from a multimedia data carrier, in particular a DVD, is read and separated into an audio data stream, a video data stream and a menu data stream. The audio data stream is converted into an audio signal which can be acoustically output and is output by an acoustic output unit. The video data stream and the menu data stream are combined into a digital graphic data stream which is blanked out when the motor vehicle is in movement. The graphic data stream is converted into a graphic signal which can be graphically output and is output by a graphic output unit. This ensures that the menu data are displayed even when the vehicle is in movement, so that the multimedia data carrier remains constantly useable.

Claims

1. An apparatus for reproducing multimedia data in a motor vehicle, comprising:

a reading unit configured to read in a digital multiplexed audio-video data stream from a multimedia data storage medium, wherein the audio-video data stream includes audio data, video picture data and menu data;

a demultiplex unit connected to said reading unit and configured to receive the audio-video data stream and produce an audio data stream, a video picture data stream, and a menu data stream therefrom;

an audio conversion unit connected to said demultiplex unit and configured to convert the audio data stream into an audibly outputtable audio signal;

a combining unit connected to said demultiplex unit configured to combine the video picture data stream and the menu data stream to form a digital graphics data stream, wherein said combining unit is further configured to receive a driving state signal indicating whether the vehicle is in a driving state and to fade out the video picture data stream from and maintain the menu data stream in the digital graphics data stream when the motor vehicle is in the driving state;

a graphical conversion unit connected to said combining unit and configured to convert the digital graphics data stream into a graphically outputtable graphics signal;

an audio output unit connected to said audio conversion unit and configured to output the audio signal; and

a graphical output unit connected to said graphical conversion unit and configured to output the graphics signal,

whereby the menu data stream is always output and displayed by the graphical output unit.

2. The apparatus of claim 1, wherein said combining unit is further configured to fade in the video picture data stream when the motor vehicle enters a non-driving state from the driving state.

3. The apparatus of claim 2, wherein the video picture data stream is selectively excluded from the digital graphics data stream independent of a status of the driving state signal.

4. The apparatus of claim 1, wherein the menu data stream includes data from a graphical user interface.

5. The apparatus of claim 1, wherein the graphical user interface is configured to permit navigation through and selection of audio data held on the multimedia data storage.

6. The apparatus of claim 1, further comprising a monitoring unit connected to said combining unit and configured to provide the driving state signal indicating that the vehicle is in a driving state when the motor vehicle exceeds a prescribed speed limit and indicating that the vehicle is in a non-driving state if the motor vehicle is below the prescribed speed limit.

7. The apparatus of claim 1, wherein the multimedia data storage medium comprises a DVD.

8. A method of reproducing multimedia data in a motor vehicle, comprising the steps of:

reading a digital multiplexed audio-video data stream from a multimedia data storage medium, wherein the audio-video data stream includes audio data, video picture data and menu data;

demultiplexing the audio-video data stream and produce an audio data stream, a video picture data stream, and a menu data stream therefrom;

converting the audio data stream into an audibly outputtable audio signal;

combining the video picture data stream and the menu data stream to form a digital graphics data stream, determining whether vehicle is in a driving state, and fading out the video picture data stream from and maintaining the menu data stream in the digital graphics data stream when the motor vehicle is determined to be in the driving state;

converting the digital graphics data stream into a graphically outputtable graphics signal;

outputting the audio signal on an audio output unit; and

outputting the graphics signal on a graphical output unit,

whereby the menu data stream is always output and displayed by the graphical output unit.