Mobile television receiver

• US 7,034,898 B1
• Filed: 02/15/2001
• Issued: 04/25/2006
• Est. Priority Date: 02/16/2000
• Status: Expired due to Term

• Current Assignee: Becker GmbH (Samsung Group)
• Original Assignee: Harman Becker Automotive Systems GmbH (Samsung Group)
• Inventors: Link, Hermann, Geiger, Erich A., Zahm, Michael, Koehler, Stefan
• Primary Examiner(s): Natnael, Paulos M.
• Application Number:
  US09/783,939
• Time in Patent Office: 1,895 Days
• Field of Search: 348/705, 348/706, 348/725, 348726-728, 348731-732, 348/735, 348/565, 348/737, 455/277.1, 455/277.2, 455/134, 455/135, 375/347, 375/343, 375/267
• US Class Current: 348/725
• CPC Class Codes: H04B 7/082 selecting best antenna path
• CPC Class Codes: H04N 21/41422 located in transportation means, e.g. personal vehicle arrangements specially adapted for transportation systems in broadcast systems H04H20/62
• CPC Class Codes: H04N 21/4263 involving specific tuning arrangements, e.g. two tuners
• CPC Class Codes: H04N 21/4384 involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
• CPC Class Codes: H04N 5/44 Receiver circuitry for the reception of television signals according to analogue transmission standards H04N5/14 takes precedence

Abstract

The receiving device contains at least two television channel selection devices to convert high-frequency signals into intermediate-frequency signals, at least two video demodulation devices to convert the intermediate-frequency signals into picture signals, at least two audio demodulation devices to convert the intermediate-frequency signals into audio signals, and one intermediate-frequency switching device to switch the audio- and video-demodulation devices to the television channel selection devices.

Claims

1. A mobile receiving device for receiving video/audio high frequency signals, the mobile receiving device comprising:

at least two channel selection devices for converting the video/audio high-frequency signals into intermediate frequency signals;

at least two video demodulation devices to convert the intermediate frequency signals into video signals;

at least two audio demodulation devices to convert the intermediate frequency signals into audio signals;

an intermediate frequency switching device that selectively connects the at least one of the audio demodulation devices or at least one of the video demodulation devices to a selected one of the channel selection devices in response to a control signal; and

a video correlation device that receives the video signals and provides a correlated video output signal.

2. The receiving device of claim 1, comprising an audio correlation device that receives the audio signals and provides a correlated audio output signal.

3. The receiving device of claim 2, comprising a label correlation device that receives the video signals and provides a label correlated output signal.

7. The receiving device of claim 3, comprising an evaluation device that receives the correlated audio output signal, the correlated video output signal, the label correlated output signal, and the audio signals and provides first switching control signals to the high-frequency switching devices and second switching control signals to the intermediate frequency switching device.

8. The receiving device of claim 7, where the evaluation device controls the high-frequency switching device and the intermediate switching device in accordance with a selectable operating mode selected by a mode command signal.

4. A mobile receiving device for receiving video/audio high frequency signals, the mobile receiving device comprising:

at least two channel selection devices for converting the video/audio high-frequency signals into intermediate frequency signals;

at least two video demodulation devices to convert the intermediate frequency signals into video signals;

at least two audio demodulation devices to convert the intermediate frequency signals into audio signals; and

an intermediate frequency switching device that selectively connects the at least one of the audio demodulation devices or at least one of the video demodulation devices to a selected one of the channel selection devices in response to a control signal; and

where at least one of the audio demodulation devices comprises a phase control circuit and at least one filter concurrent with the phase control circuit, for selection and mirror frequency suppression.

5. A mobile receiving device for receiving video/audio high frequency signals, the mobile receiving device comprising:

at least two channel selection devices for converting the video/audio high-frequency signals into intermediate frequency signals;

at least two video demodulation devices to convert the intermediate frequency signals into video signals;

at least two audio demodulation devices to convert the intermediate frequency signals into audio signals;

an intermediate frequency switching device that selectively connects the at least one of the audio demodulation devices or at least one of the video demodulation devices to a selected one of the channel selection devices in response to a control signal; and

where the at least one audio demodulation device comprises a field strength detector that provides a field strength signal.

6. The receiving device of claim 5, where the at least one audio demodulation device comprises a quality detector that provides a quality signal.

9. The receiving device of claim 6, comprising an evaluation device that receives the correlated audio output signal, the correlated video output signal, the label correlated output signal, the field strength signal, the quality signal, the audio signals and provides first switching control signals to the high-frequency switching devices and second switching control signals to the intermediate switching device.

10. A television receiving device for use in a motor vehicle, the receiving device comprising:

at least two television channel selection devices for converting received high-frequency signals into intermediate frequency signals;

at least two video demodulation devices to convert the intermediate frequency signals into video signals;

at least two audio demodulation devices to convert the intermediate frequency signals into audio signals, where each of the audio demodulation devices includes an associated field strength detector and provides a field strength signal indicative thereof;

a first switching device that receives the intermediate frequency signals and routes each of the intermediate frequency signals to an associated one of the video demodulation devices and an associated one of the audio demodulation devices; and

an evaluation device that receives the field strength signals and provides a control signal to control switching of the switching device.

11. A television receiving device for use in a motor vehicle, the receiving device comprising:

at least two television channel selection devices for converting received high-frequency signals into intermediate frequency signals;

at least two video demodulation devices to convert the intermediate frequency signals into video signals;

at least two audio demodulation devices to convert the intermediate frequency signals into audio signals, where each of the audio demodulation devices includes an associated field strength detector and provides a field strength signal indicative thereof;

a first switching device that receives the intermediate frequency signals and routes each of the intermediate frequency signals to an associated one of the video demodulation devices and an associated one of the audio demodulation devices;

a plurality of antennae that each receive high frequency signals and provide an associated received high frequency signal; and

a second switching device that selectively routes each of the received high frequency signals to a uniquely associated one of the at least two television channel selective devices.

12. The television receiving device for use in a motor vehicle of claim 11, further comprising:

a correlator that receives and correlates the video signals and provides a correlation signal indicative thereof;

an evaluation device that receives the field strength signals and the correlation signal and provides a first control signal to control switching of the first switching device, and a second control signal to control switching of the second switching device.