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Video receiving tuner

A technology for video reception and tuner, applied in TV, color TV, gigahertz frequency band transmission, etc., can solve the problem of complex system structure and achieve the effect of preventing interference

Inactive Publication Date: 2007-05-16
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, however, since the transmitted signal is such that once stored and transmitted later, there is a delay in receiving the information
Also, the system structure will become more complicated like this, because a device for storing the transmission information and a controller for controlling transmission of the stored transmission information are required

Method used

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  • Video receiving tuner
  • Video receiving tuner
  • Video receiving tuner

Examples

Experimental program
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Embodiment Construction

[0040] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. For the sake of convenience, in the following description, elements that can also be found in the conventional example shown in FIG. 10 are designated by the same reference numerals. Fig. 1 is a block diagram showing the electrical configuration of a video receiving tuner according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a video receiving tuner. The video receiving tuner 1 includes: an F-type plug (input end) 2; a front-end module 3; a digital demodulation circuit module 4; a secondary modulation circuit module 5; a sending circuit module 6; The front-end module 3, the digital solution circuit module 4, the secondary modulation circuit module 5 and the sending circuit module 6 are installed in a single machine box. Also, an F-type plug 2 and an antenna 7 are mounted on the surface of the case.

[0041] As expl...

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PUM

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Abstract

A video receiving tuner relating to the present invention comprises an input terminal for receiving video reception signals that are digitally modulated, a front-end block for amplifying the video reception signals fed thereto from the input terminal and selecting a signal of one channel as a selection signal from among the amplified video reception signals, a digital demodulation circuit block for demodulating the selection signal into a digital signal, a re-modulation circuit block for modulating a carrier wave having a predetermined frequency by the digital signal so as to produce a re-modulation signal, a transmission circuit block for processing the re-modulation signal fed thereto from the re-modulation circuit and outputting a resultant signal as a radio signal, an antenna for transmitting the radio signal, and a casing for enclosing the front-end block, the digital demodulation circuit block, the re-modulation circuit block, and the transmission circuit block.

Description

[0001] related application [0002] This non-provisional patent application claims priority from Japanese Patent Application No. 2003-198221 filed on July 17, 2003, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a video receiving tuner which receives a video signal, selects a channel, demodulates the signal of the selected channel, and transmits the demodulated signal to a television receiver. These video signals are digitally modulated in systems such as satellite broadcasting, cable television broadcasting, and terrestrial broadcasting. In particular, the present invention relates to a video receiving tuner which can be made into a compact structure and designed to allow easy relocation of the television receiver or viewing while the television receiver is moved. Background technique [0004] In recent years, digital broadcasting systems have been widely used in cable television (CATV) broadcast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/50H04N5/44H04N7/10H04N5/38H04N5/64H04N7/20
CPCH04N5/64H04N5/50H04N21/43637H04N21/4263H04N21/42607H04N21/414H04N21/4382H04N7/20H04N5/38H04N5/4401H04N21/426
Inventor 秋山利文
Owner SHARP KK