Abstract: A CPU in a home theater device transmits current sound volume control status data to a digital television receiving device when a theater mode is set. A CPU in the digital television receiving device updates, when the sound volume control status data has been received from the home theater device, sound volume control status data stored in a memory with the received sound volume control status data. A CPU in the digital television receiving device determines sound volume setting value data after an operation based on sound volume operation information fed from a remote control device and the sound volume control status data stored in the memory, and transmits a CEC command including the determined sound volume setting value data to the home theater device while displaying a ratio of the current sound volume to a maximum value in a sound volume adjustable range of the home theater device on a display.

Abstract: A CPU in a home theater device transmits current sound volume control status data to a digital television receiving device when a theater mode is set. A CPU in the digital television receiving device updates, when the sound volume control status data has been received from the home theater device, sound volume control status data stored in a memory with the received sound volume control status data. A CPU in the digital television receiving device determines sound volume setting value data after an operation based on sound volume operation information fed from a remote control device and the sound volume control status data stored in the memory, and transmits a CEC command including the determined sound volume setting value data to the home theater device while displaying a ratio of the current sound volume to a maximum value in a sound volume adjustable range of the home theater device on a display.

Abstract: A CPU in a home theater device transmits current sound volume control status data to a digital television receiving device when a theater mode is set. A CPU in the digital television receiving device updates, when the sound volume control status data has been received from the home theater device, sound volume control status data stored in a memory with the received sound volume control status data. A CPU in the digital television receiving device determines sound volume setting value data after an operation based on sound volume operation information fed from a remote control device and the sound volume control status data stored in the memory, and transmits a CEC command including the determined sound volume setting value data to the home theater device while displaying a ratio of the current sound volume to a maximum value in a sound volume adjustable range of the home theater device on a display.

Abstract: A display device switches a broadcast channel which is being received by a tuner unit based on a broadcast channel switching instruction input from a user operating unit and transmits broadcast channel switching information to a recording and reproduction device. The recording and reproduction device sets a channel of a tuner unit to the same channel as the display device based on the broadcast channel switching information. A content is recorded and reproduced by a recording and reproduction unit based on a time shift viewing/listening instruction, a switch unit of the display device is switched from the tuner unit to the recording and reproduction device, and the reproduction output from the recording and reproduction device is displayed on a display unit.

Abstract: A CPU in a home theater device transmits current sound volume control status data to a digital television receiving device when a theater mode is set. A CPU in the digital television receiving device updates, when the sound volume control status data has been received from the home theater device, sound volume control status data stored in a memory with the received sound volume control status data. A CPU in the digital television receiving device determines sound volume setting value data after an operation based on sound volume operation information fed from a remote control device and the sound volume control status data stored in the memory, and transmits a CEC command including the determined sound volume setting value data to the home theater device while displaying a ratio of the current sound volume to a maximum value in a sound volume adjustable range of the home theater device on a display.

Abstract: A display device switches a broadcast channel which is being received by a tuner unit based on a broadcast channel switching instruction input from a user operating unit and transmits broadcast channel switching information to a recording and reproduction device. The recording and reproduction device sets a channel of a tuner unit to the same channel as the display device based on the broadcast channel switching information. A content is recorded and reproduced by a recording and reproduction unit based on a time shift viewing/listening instruction, a switch unit of the display device is switched from the tuner unit to the recording and reproduction device, and the reproduction output from the recording and reproduction device is displayed on a display unit.

Abstract: A voice-signal/remote-control-pulse converter (30) receives a voice signal (S) by means of infrared rays (RV) from a remote control transmitter, and then performs voice recognition. An item of control information indicated by a recognized word (W) is converted into a control code (C) in the same format as that of a control code indicated by a remote control signal (RK). The control codes are entered into a remote control pulse selector (23) as respective remote control pulses P1 and P2 in the common format. The remote control pulse selector (23) enters exclusively one of the remote control pulses P1 and P2 into a remote control pulse decoder (24) in response to a remote-control-pulse switching signal (N).

Abstract: A voice-signal/remote-control-pulse converter (30) receives a voice signal (S) by means of infrared rays (RV) from a remote control transmitter, and then performs voice recognition. An item of control information indicated by a recognized word (W) is converted into a control code (C) in the same format as that of a control code indicated by a remote control signal (RK). The control codes are entered into a remote control pulse selector (23) as respective remote control pulses P1 and P2 in the common format. The remote control pulse selector (23) enters exclusively one of the remote control pulses P1 and P2 into a remote control pulse decoder (24) in response to a remote-control-pulse switching signal (N).