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Automatic channel selecting device

A channel selection and automatic technology, applied in the direction of automatic frequency control, automatic frequency band scanning, selective content distribution, etc., can solve problems such as unsolvable and wrong presets

Inactive Publication Date: 2007-07-18
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, for example, the problem of erroneous presetting, that is, the problem of presetting digital broadcast stations by erroneously presetting analog broadcast receiving equipment remains unsolved

Method used

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Examples

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no. 1 example

[0030] Fig. 3 is a block diagram of an embodiment of the present invention applied to an on-vehicle receiving device for analog television broadcasting. An analog television receiving device 50 for receiving analog television broadcasts has an antenna 51, a front end 52, a sound detector section 53, an image detector section 54, a microcomputer 55, and a memory 56, and performs broadcast reception, demodulation of received signals, and automatic pre-preparation. Set up a broadcast station that can output normally. "Normal output" means that images and sounds are output in a way that users can recognize and understand. A current position detecting device 57 for detecting the current position, and a speaker 58 and a monitor 59 for outputting broadcasts have been mounted on the car as a well-known navigation system or the like, and are used in pairs in this embodiment.

[0031]The front end 52 has a well-known high-frequency amplifier, local oscillator, mixer, etc., reproduces a...

no. 2 example

[0046] In the foregoing first embodiment, automatic reservation processing is performed by using information (template) of broadcasting stations to be avoided from being reserved. The information is stored in the memory 56 of the analog television set 50 . On the other hand, when the digital television receiver is also provided to the car, even if the information of the preset broadcast station is not stored in the memory 56 of the analog television receiver 50, in the analog television receiver 50, erroneous preset is avoided. possible. In the present embodiment, the analog television receiving apparatus 50 avoids erroneous presetting according to the result of automatic presetting by the receiving apparatus for digital television broadcasting.

[0047] The second embodiment will be described in detail below, focusing on things different from the first embodiment described above. As shown in FIG. 6, an analog television receiving device 50 and a digital television receiving...

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PUM

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Abstract

To efficiently auto-preset a broadcasting station capable of normal outputting by excluding a broadcasting station incapable of normal outputting in a broadcast receiving apparatus. Preset is invalidated not to store frequency information of a broadcasting station incapable of normal outputting in broadcasting stations receivable for the broadcast receiving apparatus. Preset is invalidated by disabling tuning of the broadcasting station incapable of normal outputting or by deleting the frequency information after presetting, and preset is performed only for the broadcasting station capable of normal outputting. Thus, efficient auto-preset is made possible. (C)2005,JPO&NCIPI.

Description

technical field [0001] The invention relates to an automatic channel selection device for a broadcast receiving device of a mobile unit, in particular to an automatic channel selection device for automatically selecting broadcast stations that can be normally output. technical background [0002] Recently, with the development of digital technologies such as the Internet and computers, it has become possible to acquire complex and high-function multimedia broadcasts through digital broadcasting devices. In digital broadcasting, a compressed signal of coded data such as images and sounds is transmitted by loading it on a carrier wave. Since data errors can be corrected in digital broadcasting, mobile units can receive broadcasting. In existing analog television broadcasting, frequencies for broadcasting divided every 6 MHz constitute a single channel, and each channel is allocated to a single broadcasting station. On the other hand, in digital broadcasting, multipath noise ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H03J7/00H03J1/00H03J5/02H03J7/18H03J7/20H04N5/44H04N5/46H04N5/50
CPCH04N21/4524H04N5/46H04N21/4383H04N5/4401H03J2200/13H04N5/50H04N21/4345H03J7/20H03J2200/12H03J1/0075H04N21/426
Inventor 加藤大明
Owner DENSO CORP