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Broadcast receiver device, broadcast receiving set, and channel switching method

  • US 20060236356A1
  • Filed: 04/13/2006
  • Published: 10/19/2006
  • Est. Priority Date: 04/13/2005
  • Status: Active Grant
First Claim
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1. A broadcast receiver device comprising:

  • a tuner switching a channel and extracting a broadcast signal corresponding to the switched channel from externally applied broadcast signals corresponding to respective plurality of channels, a digital broadcast reception block converting a digital broadcast signal extracted by said tuner into an output signal to output the converted output signal, an analog broadcast reception block converting an analog broadcast signal extracted by said tuner into an output signal to output the converted output signal, a digital control unit controlling said digital broadcast reception block, an analog control unit controlling said analog broadcast reception block, digital storage means provided at said digital control unit for prestoring a digital channel map in which each channel of a digital broadcast is arranged in order of a preassigned number, analog storage means provided at said analog control unit for prestoring an analog channel map in which each channel of an analog broadcast is arranged in order of a preassigned number, switching instruction acceptance means for accepting an instruction of a switching direction of said channel, analog inquiry means provided at said digital control unit for inquiring of said analog control unit about an analog number that is the number of the channel next to a currently extracted channel in said switching direction according to the order indicated in the analog channel map stored in said analog storage means in a case where a digital broadcast signal is currently extracted by said tuner when said instruction of the switching direction is accepted by said switching instruction acceptance means, analog transmission means provided at said analog control unit for transmitting the analog number inquired by the analog inquiry means to said digital control unit, digital determination means provided at said digital control unit for determining which of the analog number transmitted by said analog transmission means and a digital number that is the number of the channel next to the currently extracted channel in said switching direction according to the order indicated in the digital channel map stored in said digital storage means is closer to a currently extracted number that is the number of the currently extracted channel, digital extraction mode analog switching control means provided at said analog control unit for controlling said tuner to switch to the channel of said analog number when determination is made of being closer to said analog number by said digital determination means, digital extraction mode digital power saving means for causing transition of said digital broadcast reception block to a power saving state when switched to the channel of said analog number by said digital extraction mode analog switching control means, digital extraction mode digital switching control means provided at said digital control means for controlling said tuner to switch to the channel of said digital number when determination is made of being closer to said digital number by said digital determination means, digital extraction mode analog power saving means for causing transition of said analog broadcast reception block to a power saving state when switched to the channel of said digital number by said digital extraction mode digital switching control means, digital inquiry means provided at said analog control means for inquiring of said digital control unit about said digital number in a case where an analog broadcast signal is currently extracted by said tuner when said instruction of the switching direction is accepted by said switching instruction acceptance means, digital transmission means provided at said digital control unit for transmitting the digital number inquired by said digital inquiry means to said analog control unit, analog determination means provided at said analog control unit for determining which of the digital number transmitted by said digital transmission means and said analog number is closer to said currently extracted number, analog extraction mode digital switching control means provided at said digital control unit for controlling said tuner to switch to the channel of said digital number when determination is made of being closer to said digital number by said analog determination means, analog extraction mode analog power saving means for causing transition of said analog broadcast reception block to a power saving state when switched to the channel of said digital number by said analog extraction mode digital switching control means, analog extraction mode analog switching control means provided at said analog control unit for controlling said tuner to switch to the channel of said analog number when determination is made of being closer to said analog number by said analog determination means, and analog extraction mode digital power saving means for causing transition of said digital broadcast reception block to a power saving state when switched to the channel of said analog number by said analog extraction mode analog switching control means.

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