Wireless redistribution system for terrestrial digital television broadcasting

• US 7,538,825 B2
• Filed: 08/30/2005
• Issued: 05/26/2009
• Est. Priority Date: 08/31/2004
• Status: Expired due to Fees

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Yamashita, Akihiko, Kasamatsu, Hideki, Asao, Motoaki
• Primary Examiner(s): Yenke; Brian P
• Application Number:
  US11/214,029
• Publication Number:
  US 20060190972A1
• Time in Patent Office: 1,365 Days
• Field of Search: 348/722, 348/725, 348607-608, 348/553, 348/555, 348/731, 725/74, 725/80, 725/81, 455/3.01, 455/93
• US Class Current: 348/725
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/6112 involving terrestrial transmission, e.g. DVB-T
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

A transmitter includes: frequency conversion means for collectively frequency-converting terrestrial digital TV broadcast signals inputted such that the frequency of terrestrial digital TV broadcast signals of a viewing desired channel inputted by viewing desired channel input means, among the terrestrial digital TV broadcast signals inputted, are converted to a frequency of a specific unused channel of a predetermined VHF band; filter means for extracting only TV broadcast signals of the specific unused channel of the predetermined VHF band among the TV broadcast signals obtained by the frequency conversion means; and transmission means for amplifying and wirelessly transmitting the TV broadcast signals extracted by the filter means.

Claims

1. A wireless redistribution system for terrestrial digital TV broadcasting, which is applied to a TV receiver capable of receiving TV broadcast signals of a VHF band in addition to TV broadcast signals of a UHF band as a frequency band of terrestrial digital TV broadcast signals, the system comprising:

a transmitter, into which terrestrial digital TV broadcast signals received by an outdoor antenna are inputted, for frequency-converting the terrestrial digital TV broadcast signals inputted and then transmitting them wirelessly;

viewing desired channel input means for inputting a viewing desired channel of the terrestrial digital TV broadcasting into the transmitter; and

a receiver for receiving and amplifying signals transmitted from the transmitter, and then supplying them to the TV receiver, wherein

the transmitter includes;

frequency conversion means for collectively frequency-converting terrestrial digital TV broadcast signals inputted such that the frequency of terrestrial digital TV broadcast signals of a viewing desired channel inputted by the viewing desired channel input means, among the terrestrial digital TV broadcast signals inputted, are converted to a frequency of a specific unused channel of a predetermined VHF band;

filter means for extracting only TV broadcast signals of the specific unused channel of the predetermined VHF band among the TV broadcast signals obtained by the frequency conversion means; and

transmission means for amplifying and wirelessly transmitting the TV broadcast signals extracted by the filter means.

2. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 1, wherein

the frequency of the specific unused channel of the predetermined VHF band is a frequency of a specific unused channel of a VHF band within a range between 260 MHz and 470 MHz.

3. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 1, wherein

the viewing desired channel input means is a remote control transmitter for transmitting the viewing desired channel to the transmitter wirelessly or with an infrared ray.

4. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 1, wherein

the viewing desired channel input means includes:

a remote control transmitter for transmitting the viewing desired channel to the receiver wirelessly or with an infrared ray; and

means, provided in the receiver, for receiving the viewing desired channel transmitted from the remote control transmitter, and transmitting it to the transmitter.

5. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 1, wherein

the viewing desired channel input means includes:

a remote control transmitter for a TV for transmitting the viewing desired channel to the TV receiver wirelessly or with an infrared ray;

means, provided in the TV receiver, for receiving the viewing desired channel transmitted from the remote control transmitter for the TV, and transmitting it to the receiver; and

means, provided in the receiver, for transmitting the viewing desired channel transmitted from the TV receiver to the transmitter.

6. A wireless redistribution system for terrestrial digital TV broadcasting, comprising:

a TV receiver capable of receiving TV broadcast signals of a VHF band in addition to TV broadcast signals of a UHF band as a frequency of terrestrial digital TV broadcast signals;

a transmitter, into which terrestrial digital TV broadcast signals received by an outdoor antenna is inputted, for frequency-converting the terrestrial digital TV broadcast signals inputted and then transmitting them wirelessly;

viewing desired channel input means for inputting a viewing desired channel of the terrestrial digital TV broadcasting into the transmitter and into the TV receiver; and

a receiver for receiving and amplifying signals transmitted from the transmitter and then supplying them to the TV receiver, wherein

the transmitter includes;

frequency conversion means for collectively frequency-converting the terrestrial digital TV broadcast signals inputted such that a frequency of the terrestrial digital TV broadcast signals of the viewing desired channel inputted by the viewing desired channel input means, among the terrestrial digital TV broadcast signals inputted, is converted to a frequency of a specific unused channel of a predetermined VHF band;

filter means for extracting only TV broadcast signals of the specific unused channel of the predetermined VHF band among the TV broadcast signals obtained by the frequency conversion means; and

transmission means for amplifying and wirelessly transmitting the TV broadcast signals extracted by the filter means, and

the TV receiver includes;

means for displaying the viewing desired channel of the terrestrial digital TV broadcasting inputted by the viewing desired channel input means.

7. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 6, wherein

the frequency of the specific unused channel of the predetermined VHF band is a frequency of a specific unused channel of a VHF band within a range between 260 MHz and 470 MHz.

8. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 6, wherein

the viewing desired channel input means is a remote control transmitter for transmitting the viewing desired channel to the transmitter and to the TV receiver wirelessly or with an infrared ray.

9. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 6, wherein

the viewing desired channel input means includes:

a remote control transmitter for transmitting the viewing desired channel to the transmitter wirelessly or with an infrared ray; and

means for inputting the viewing desired channel, transmitted from the remote control transmitter to the transmitter, into the TV receiver via the transmitter and the receiver.

10. A wireless redistribution system for terrestrial digital TV broadcasting, comprising:

a TV receiver capable of receiving TV broadcast signals of a VHF band in addition to TV broadcast signals of a UHF band as a frequency of terrestrial digital TV broadcast signals;

a transmitter, into which terrestrial digital TV broadcast signals received by an outdoor antenna is inputted, for frequency-converting the terrestrial digital TV broadcast signals inputted and then transmitting them wirelessly;

viewing desired channel input means for inputting a viewing desired channel of the terrestrial digital TV broadcasting into the transmitter; and

a receiver for receiving and amplifying signals transmitted from the transmitter, and then supplying them to the TV receiver, wherein

the transmitter includes;

first means for frequency-converting terrestrial digital TV broadcast signals of the viewing desired channel inputted by the viewing desired channel input means, among the terrestrial digital TV broadcast signals inputted to a plurality of unused channels of a predetermined VHF band; and

second means for amplifying and wirelessly transmitting the terrestrial digital TV broadcast signals of the viewing desired channel frequency-converted to the plurality of unused channels of the VHF band by the first means, and

the TV receiver includes;

selection means for selecting TV broadcast signals of a channel having a high receiving quality, among the TV broadcast signals of the plurality of channels supplied from the transmitter via the receiver; and

reproduction means for reproducing the TV broadcast signals selected by the selection means.

11. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 10, wherein

the frequency of the specific unused channel of the predetermined VHF band is a frequency of a specific unused channel of a VHF band within a range between 260 MHz and 470 MHz.

12. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 10, wherein

the selection means selects TV broadcast signals of a channel having high receiving quality by comparing received signal levels of TV broadcast signals of the plurality of channels supplied from the transmitter via the receiver.

13. The wireless redistribution system for terrestrial digital TV broadcasting according to claim 10, wherein

the selection means selects TV broadcast signals of a channel having high receiving quality by comparing received signal error rates of TV broadcast signals of the plurality of channels supplied from the transmitter via the receiver.