JPH04237276A - Television receiver - Google Patents

Abstract

PURPOSE:To display a signal at channel changeover and at revision of a broadcast multiplex audio transmission mode not only at revision of the selection mode of a multiplexed audio signal even when the selection mode of a multiplexed audio signal designated already is forgotten. CONSTITUTION:At the selection mode of a multiplexed audio signal to be listened to, regardless of the transmission mode of the multiplexed voice signal on-air, the data of the designated selection mode is stored in a memory in a control section 15 subject to changeover control of the above audio signal. Then the signal is superimposed on a video image of the display pattern and a character or a symbol representing the selection mode and the transmission mode is displayed and when the transmission mode and the selection mode on-air differ from each other, the display color of the character or the symbol is made different from the display color when they are coincident, Moreover, the display of the selection mode and the transmission mode is implemented not only at the designation revision of the selection mode but also at the detection of the revision of the transmission mode of a broadcast signal, at the revision of a reception channel of the television broadcast and power-on of the television receiver.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display of a transmission mode and/or a selection mode of a television receiver that can arbitrarily select a broadcast audio multiplexed audio signal.

0002

2. Description of the Related Art In VHF/UHF television broadcasting, a control signal included in a multiplexed audio signal is identified, and in satellite relay television broadcasting, a control code of a demodulated digital audio signal is identified to perform stereo broadcasting. The transmission mode of multiplexed audio such as bilingual broadcasting is displayed with a lamp or characters or symbols representing the same transmission mode are displayed superimposed on the image on the display screen,
The selection mode of the demodulated audio signal of the same multiplexed signal specified by a key provided on the television receiver or a remote controller was also superimposed and displayed on the image on the same display screen for only a few seconds immediately after switching. However, since the transmission mode of the audio multiplexing method is switched appropriately depending on the content of the video program being simultaneously transmitted, it does not necessarily match the specified selection mode, and the selection mode does not match the transmission mode. In this case, the demodulated audio signal is switched to a preset mode similar to the same transmission mode, and is supplied to the audio output circuit, regardless of the display of the selected mode.

0003

[Problem to be Solved by the Invention] In the above-mentioned device that displays the multiplexed audio signal transmission mode and selection mode in a superimposed manner on the image on the display screen, a new selection mode is displayed only when the same selection mode is switched. It is displayed for a few seconds and then disappears, so if you forgot the same selection mode, you had to specify and confirm that you want to change the same selection mode. Furthermore, when the transmission mode of the multiplexed audio signal does not match the specified selection mode, the system automatically switches to a preset mode corresponding to the transmission mode, regardless of the same selection mode and the display of the same selection mode. This selection mode is rarely noticed, and it is inconvenient that a desired foreign language audio signal cannot be recorded when a timer is used to schedule recording on a VTR.

0004

[Means for Solving the Problems] When specifying the selection mode of a multiplexed audio signal to be listened to, control controls switching of the specified selection mode data to the same audio signal, regardless of the transmission mode of the multiplexed audio signal during broadcasting. In addition to storing it in its internal memory, it also displays characters or symbols that represent the same selection mode and the same transmission mode by superimposing them on the image on the display screen. Set the display color to be different from the display color when there is a match. In addition, the selection mode and transmission mode are displayed not only when the selection mode is changed, but also when a change in the broadcast signal transmission mode is detected, when the television broadcast reception channel is changed, and when the television receiver is turned on. conduct.

[0005]

[Operation] In the block diagram of the television receiver of the present invention shown in FIG. 1, a broadcast signal of a specified channel is selected from among the television broadcast signals inputted to the input terminal 10, and the broadcast signal, which has been converted to an intermediate frequency and amplified, is sent to the audio demodulation circuit 11. and a video detection circuit, and each circuit reproduces the multiplexed audio signal 12 or video signal. As shown in FIG. 2, the multiplexed audio signal 12 includes a 31.5 kHz subcarrier frequency-modulated with a main channel audio signal below 15 kHz, a sub channel audio signal on the higher frequency side, and stereo broadcasting or bilingual broadcasting. A second subcarrier wave of 55.125 kHz is arranged, which is amplitude-modulated with a control signal representing the content of the broadcast.

In the main channel, the sum signal of the left and right channel audio signals during stereo broadcasting is converted into the main audio signal (for example, Japanese) during monaural broadcasting or bilingual broadcasting.
A signal is sent out, and the subcarrier is modulated with a difference signal between left and right channel audio signals during stereo broadcasting or a sub audio (for example, foreign language) signal during bilingual broadcasting, and then sent out. Based on the output of the control unit 15 that controls the switching operation of the television receiver, the audio switching circuit 13 selects the signal of the desired audio channel specified by the key operation provided on the television receiver, and the two-channel audio amplification circuit is activated. through which they drive the speakers placed on the left and right sides of the television receiver, respectively.

That is, when monaural is specified, the main channel audio signal or the main or sub audio of bilingual broadcasting is distributed to the left and right channels, and when stereo is specified, the main and sub channel audio signals are distributed to the left and right channels via a matrix circuit. The right channel audio signal or the designated main and sub audio signals for bilingual broadcasting are supplied to the respective audio amplification circuits. When the selection of the audio channel specified by the key operation, that is, the selection mode of the audio channel, does not match the multiplexing of the audio signal broadcasted with the video signal, that is, the transmission mode of the multiplexed audio signal, the same transmission mode is applied. The audio channel is automatically selected according to the mode stored in the control unit 15 in advance.

In addition to selecting an audio channel in the audio switching circuit 13, the control section 15 outputs character or symbol data representing the transmission mode in accordance with the transmission mode, and displays a display signal corresponding to the data. Converted,
It is superimposed on the video signal on the display screen and displayed in the upper right corner of the display screen along with the channel number currently being received. Similarly, for the specified selection mode, the control unit 15 outputs character or symbol data representing the selection mode, and displays the data superimposed on the video signal on the display screen near the center of the lower part of the display screen.

At this time, if the same selection mode and the same transmission mode do not match, the display color of the characters or symbols to be displayed or the background color of the same characters or symbols may be changed to a color different from the display color at the time of the same match, for example green, for example. Display in red. The above-mentioned display is received by the control procedure shown in FIG. Along with the channel number inside, characters or symbols representing the multiplexed audio transmission mode and its selection mode are displayed. A display example of the transmission mode and selection mode is shown in FIG.

[0010] In satellite relay television broadcasting, the audio signal is transmitted together with the video signal as digital data having the structure shown in FIG. Represents the configuration of subsequent data and audio transmission mode. That is,
In the contents of the control code shown in FIG. 6(c), bit 1 of the control code represents mode A of 4-channel audio with 10 bits of quantization or B mode of 2-channel audio with 16 bits of quantization. The data structures in the A-mode and B-mode audio frames are shown in FIGS. 6(a) and 6(b), respectively.

Bits 2 and 3 of the control code indicate the first two channels of A mode, stereo audio in audio transmission mode in B mode, two monaural channels such as bilingual broadcasting, or the same content on two channels. bit 4 and bit 5 represent the signal mode of the latter two channels of A mode, indicating the same content as the first two channels. Even in the case of satellite relay television broadcasting, the audio signal transmission mode identified by the control code and the selection mode specified by key operation are displayed superimposed on the image on the display screen.

0012

[Example] The television broadcast signal input to the input terminal 10 is supplied to the tuner section, the broadcast signal of the specified channel is selected, it is converted to an intermediate frequency, and the intermediate frequency amplification section is supplied, and the amplified broadcast signal is audio demodulated. It is supplied to the circuit 11 and the video detection circuit. The multiplexed audio signal demodulated by the audio demodulation circuit 11 and the multiplexed and demodulated audio signal are supplied to an audio switching circuit, and the detected and discriminated control signal of the second subcarrier is supplied to the control unit 15.

The control section 15 identifies the input multiplexing control signal, and sends character or symbol data representing the transmission mode indicating the contents of the audio signal multiplexing to the display control section 16 together with the data of the channel number currently being received. supply The data input to the display control unit 16 is converted into a display signal corresponding to the data, and is supplied to the signal synthesis circuit 17 together with the received and demodulated video signals corresponding to red, green, and blue, and is superimposed on the video signal. The receiving channel number and the multiplexed audio transmission mode are displayed in the upper right corner of the display screen.

The control unit 15 reads the operation signal of the multiplex audio selection key of the key input unit 14 provided in the television receiver of the present invention, and supplies a control signal corresponding to the operation signal to the audio switching circuit 13 to select the selected sound. The selected audio signal is used to drive speakers placed on the left and right sides of the television receiver via a two-channel audio amplification circuit. A desired audio channel of the multiplexed audio signal is selected by the control signal outputted by the control unit 15, and character or symbol data representing the selected audio channel, that is, the selection mode of the multiplexed audio signal is displayed in the display control unit. 16, and the converted display signal is superimposed on the video signal of the display screen to display characters or symbols of the same selection mode near the bottom center of the display screen.

At this time, if the selection mode and the multiplexed audio transmission mode do not match, the audio channel selected by the audio switching circuit 13 is changed to the control section 15 according to the same transmission mode, regardless of the same selection mode. Select a pre-stored audio channel and display the display color of the characters or symbols of the same selection mode and/or the same transmission mode, or the background color of the same characters or symbols, when the same selection mode and the same transmission mode match. Display in a color different from green, for example red. At this time, the display of the reception channel number displayed together with the selection mode and transmission mode may also be changed in the same way. Alternatively, the selection mode and transmission mode may be displayed for only a few seconds and then erased. The selection mode, transmission mode, and reception channel number are displayed according to the control procedure shown in 32 of the control unit 15 when the television receiver is turned on, when the reception channel is changed, when the selection mode is changed, or when multiplexing of broadcasting is performed. Displays when a change in audio transmission mode is detected. A display example of the transmission mode and selection mode is shown in FIG.

In a television receiver equipped with a receiving section for satellite relay television broadcasting, the tuner section 21 selects a designated channel from the BS-IF signal input to the input terminal 20 in the block diagram of the receiving section shown in FIG. The broadcast signal is selectively demodulated and the amplified video signal 22 is outputted through a low-pass filter, and the demodulated signal is outputted as a digital audio signal 23 through a bandpass filter and a digital demodulation section. FIG. 6 shows the configuration of the digital audio signal 23. The control code following the frame synchronization signal of the signal 23 represents the configuration of subsequent data and the audio transmission mode, as shown in FIG. 6(c). Bit 1 of the control code indicates the audio A mode or B mode, bits 2 and 3 indicate the first two channels of A mode or the audio transmission mode in B mode, and bits 4 and 5 indicate the second half of A mode. Represents a 2-channel signal mode.

Digital audio signal 23 including the control code
is supplied to the digital signal processing circuit 24, which selects and outputs a predetermined audio signal according to the control code and the control signal 26 output from the control section 15, and outputs the analog audio signal 25 via the digital-to-analog converter. The video signal 22
At the same time, the signal is supplied to the audio switching circuit 13 and the signal synthesis circuit shown in the block diagram shown in FIG. As described above, even in the case of satellite relay television broadcasting, the same selection mode as described above is displayed in a superimposed manner on the image on the display screen, together with the transmission mode of the audio signal identified by the control code and the channel number of the same broadcast.

[0018]

[Effects of the Invention] As described above, even if you forget the specified multiplexed audio selection mode, it is displayed not only when changing the multiplexed audio selection mode, but also when switching channels and updating the multiplexed audio transmission mode for broadcasting. Moreover, by changing the color of the display when the selection mode is different from the transmission mode, the viewer's attention is called to the viewer's attention, and it is possible to prevent unplanned audio from being recorded during an absentee recording using a VTR or the like.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a television receiver according to the present invention.

FIG. 2 is a frequency allocation diagram of multiplexed audio signals for television broadcasting.

FIG. 3 is a flowchart of a control procedure related to sending out multiplexed audio and displaying a selection mode.

FIG. 4 is a front view of an example of multiplexed audio transmission and selection mode display.

FIG. 5 is a block diagram of a satellite relay television broadcast receiving section.

FIG. 6 is a configuration diagram of a digital audio signal for satellite relay television broadcasting.

[Explanation of symbols]

10 Antenna input terminal 12 Demodulated audio signal 13 Audio switching circuit 15 Control section 16 Display control section 17 Signal synthesis circuit 20 Satellite broadcasting IF input terminal 23 Digital audio signal 24 Digital signal processing section 25 Analog audio signal 26 Control signal

Claims (3)

[Claims] Claim 1: Demodulating a multiplexed audio broadcast signal, selecting a designated audio signal and supplying it to an audio amplification unit, and changing a multiplexed audio transmission mode and a demodulated audio signal selection mode to an image on a display screen. In a television receiver that displays superimposed images,
When the selection mode of the specified audio signal differs from the transmission mode of multiplexed audio, the display color of the display characters or symbols or the background color of the display area of the same character or symbol for the same selection mode and/or transmission mode may be the same. A television receiver characterized by displaying a different color for a transmission mode than when the same selected mode matches. 2. When the selection mode of the specified audio signal is different from the transmission mode of the multiplexed audio, the display color of the display character or symbol of the same selection mode and/or the same transmission mode, or the display of the same character or symbol. 2. The television receiver according to claim 1, wherein the background color of the area is red, and when the selection mode matches the transmission mode, the display color is green. 3. A selection mode of the multiplexed audio signal and/or a selection mode of the multiplexed audio signal.
Or, display characters or symbols for the transmission mode, together with the channel number currently being received when detecting a change in the broadcast transmission mode, changing the selected mode, changing the receiving channel, or turning on the TV receiver. The television receiver according to claim 1 or 2, characterized in that a selection mode is displayed.