JPH1013764A - Sound volume correction device at signal source changeover and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct a sound volume difference to be almost constant in a listening sense by automatically correcting a sound volume difference of an output voice signal caused in the case of switching a signal source. SOLUTION: The user controls a remote controller 7 to set a sound volume correction amount to correct a difference for a reception sound volume level between signal sources such as a VHF and a BS, then a microcomputer 5 stores the sound volume correction amount to a memory 6 and the sound volume level instructed by the usual sound volume level by the remote controller 7 is stored in the memory 6 as reference voice data. Then in the case of channel selection, the microcomputer 5 reads voice reference data and the sound volume correction amount from the memory 6 and controls a voice circuit 4 so that the output voice level indicates a sound volume denoted by the sound volume data obtained by the addition of the data above. For example, in the case that a source VHF is changed into a source BS, the sound with almost a constant sound level is outputted from a speaker 8 without manual sound volume adjustment by the user.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a built-in BS / CS tuner for receiving satellite broadcasts in addition to a tuner for receiving terrestrial broadcasts and having an external input. The present invention relates to a sound volume correction device when the signal source is switched by performing the above operation.

[0002]

2. Description of the Related Art In a conventional television receiver with a built-in BS / CS or an external input, when a signal source is switched from a terrestrial channel (for example, VHS) to another terrestrial channel, a received sound between the terrestrial channels is received. In most cases, there is no need to readjust the volume since there is no difference in the volume levels of the signals. However, for example, when switching from a state in which a terrestrial channel is being received to, for example, a satellite broadcast, for example, a BS channel, the volume difference between the output audio signals is caused by the difference between the modulation degree of the received audio signal and the level of the input signal. There may be a difference, and the volume may change on hearing. In such a case, the user has to perform the operation of adjusting the volume every time (the operation of the remote controller or the operation of the main body switch), so that the user is burdened and the usability is poor. Such a problem also occurs when switching from terrestrial broadcasting to an external input signal source.

[0003]

When a signal source is switched from a terrestrial broadcast to a BS / CS channel for satellite broadcasting or an external input in a conventional television receiver with a built-in BS / CS or an external input. Depending on the degree of modulation of the sound or the level of the input signal, there may be a difference in volume between the output sounds. In such a case, for example, every time the channel is switched from the reception of the terrestrial wave to the BS / CS channel of the satellite broadcast, or vice versa, the user has to perform an operation of manually re-adjusting the volume. There was a problem that it was inconvenient to use.

Accordingly, the present invention has been made to solve the above-described problems, and automatically corrects a volume difference of an output audio signal generated when a signal source is switched by selecting a station or the like. It is an object of the present invention to provide a sound volume correction device that can be corrected to a substantially constant audibility when a signal source is switched, and a user-friendly television receiver using the device.

[0005]

According to a first aspect of the present invention, there is provided a volume correction setting for presetting, for each signal source, volume correction data for correcting a volume level of a switching destination signal source when a signal source is switched. Means, when the signal source is switched, based on volume correction data corresponding to the switching destination signal source set in the volume correction setting means, volume level control means for adjusting the level of the output audio signal, Is provided.

According to a second aspect of the present invention, the volume correction setting means sets the volume level to be increased or decreased with respect to the volume level of the output sound set by normal volume adjustment as volume correction data. A configuration is provided for setting for each of the signal sources.

According to a third aspect of the present invention, the volume correction setting means sets a volume level to be increased or decreased with respect to a volume level of a specific signal source to a volume level of another signal source based on the volume level of the specific signal source. A configuration for setting as data is provided.

According to a fourth aspect of the present invention, when the volume correction data is set, a user is arbitrarily selected and set a signal source having a reference volume level.

According to a fifth aspect of the present invention, the volume level control means converts the volume correction data of the switching destination signal source set in the volume correction setting means to a volume level currently set by normal volume adjustment. A configuration is provided in which the added volume level is obtained, and the level of the output audio signal is adjusted so as to reach this volume level.

The invention according to claim 6 can receive terrestrial broadcasting, satellite broadcasting, cable television broadcasting as a signal source,
A television receiver capable of externally inputting a signal source, further comprising a volume correction device for switching a signal source according to any one of claims 1 to 5, wherein the volume correction device for switching a signal source when the signal source is switched. Is used to correct the volume of the output audio signal.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of a television receiver employing a volume correction device for switching a signal source according to the present invention. 1 is VHF / UH
F / BS / CS / external input 1 / external input 2 can be received, and a television receiver having external input 1 / external input 2 etc., 2 is an antenna for receiving a television broadcast wave, 3 is A demodulation circuit for demodulating a received signal and selecting a channel, an audio circuit for processing an audio signal and changing a volume level, a microcomputer for controlling a channel selection operation and controlling a volume, and a volume data and a volume for 6 A memory for storing correction data, a remote controller 7 for a user to operate, and a speaker 8 for outputting sound to the outside. However, the microcomputer 5 and the remote controller 7 constitute volume correction setting means, and the microcomputer 5 and the audio circuit 4 constitute volume level control means.

Next, the operation of this embodiment will be described. When the user corrects the level difference of the output audio signal when the signal source is switched, for example, when switching the channel, the user operates the remote controller 7 to enter the volume correction setting mode. A volume correction setting screen as shown in FIG. 2 is displayed. The user sets the volume correction between signal sources while viewing the volume correction setting screen.

First, the user selects a mode (VHF / UHF / BS / external 1) corresponding to the signal source for which the volume correction amount is desired to be set.
2) by operating the remote controller 7 as shown in FIG.
Is selected by moving the cursor on the screen. In the example of FIG. 2, the BS mode is selected.

Next, a volume correction amount is set. By operating the ten-side switch (not shown) of the remote controller 7,
By changing the volume correction amount set on the screen as 0 → + 1 → + 2... And operating the one-side switch, 0 → −1 → −
Change the volume correction amount set on the screen as 2. The other modes are set in the same manner after moving the cursor.

Here, when the user operates the remote controller 7 to adjust the volume while receiving the broadcast channel and sets the set volume level as the reference volume data, the above-mentioned volume correction amount is equal to the reference volume. The volume level added to the data is shown. That is, in the example shown in FIG. 2, during reception of VHF or UHF, the audio circuit 4 is controlled so that audio having a volume corresponding to the reference volume data is output from the speaker. However, during the reception of the BS, the audio circuit 4 is controlled so that a sound having a volume obtained by adding 3 dB to the reference volume data is output from the speaker.

The setting of the volume correction amount is different from the above. For example, based on the reception volume level of VHF, when UHF, BS, external inputs 1 and 2 other than VHF are selected as signal sources, VHF You may set what dB volume level is increased or decreased with respect to the volume level of the received audio signal. In this case, the reference signal source may be arbitrarily set by the user other than VHF,
The manufacturer may fixedly set in advance.

Here, the reference volume data is a volume level set by the user operating the remote controller 7 to adjust the volume while receiving a broadcast channel.

When the user sets the volume correction amount of the target mode, the user performs an operation of transmitting these setting data.
Data indicating the volume correction amount of each set mode is transmitted from the remote controller 7 to the microcomputer 5. The microcomputer 5 stores the received data in a built-in (or external) memory 6. The microcomputer 5 always stores the volume data set by the volume setting button of the remote controller 7 in the memory 6 as reference volume data. However, this volume setting button is a normal button for adjusting the volume when the user watches a television broadcast program. still,
The setting of the volume correction can be similarly performed by using operation switches and buttons (not shown) provided on the television body.

Next, the normal operation after the volume correction is set will be described. When the power is turned on or when a station is selected, the microcomputer 5 controls the demodulation circuit 3 to switch signals and control the operation of selecting a broadcasting station to be received. At this time, the microcomputer 5 reads out the reference volume data and the volume correction amount data corresponding to the mode at this time from the memory 6 and controls the volume of the audio circuit 4 based on the addition result of the reference volume data + the volume correction amount data. For this purpose, a sound having a sound level corresponding to the reference sound volume data + the sound volume correction amount data is output from the speaker 8. For example, if the mode at power-on or after tuning is VHF, the reference volume data +
The audio circuit 4 is controlled to a volume of 0 and immediately to the volume of the reference volume data.

Thereafter, when the channel is changed and the mode is changed to the BS, the microcomputer 5 reads the reference volume data and the volume correction amount data from the memory 6 and outputs the volume of the reference volume data + 3 dB. The audio circuit 4 is controlled. Therefore, the user does not need to do anything.
When the tuning destination changes from F to BS, the volume is automatically + 3d
B up, if the reception level of BS is + than VHF
3 dB lower and the speaker 8
The sound level output from the speaker has almost the same audibility.

FIG. 3 is a flowchart showing the volume correction setting operation described above. When the user operates the remote controller 7 to set the volume correction setting mode, step 3
At 01, the display of the remote controller 7 transits to a volume setting screen. Next, the user moves the cursor on the screen to determine the volume correction setting target mode while watching the volume setting screen in step 302, and then, in step 303, adjusts the volume correction amount by the level increase / decrease operation of the remote controller 7. Set. Thereafter, in order to transmit the set value (volume correction amount) of the remote controller 7 to the microcomputer 5, the microcomputer 5 writes the set data to the memory 6 in step 304 and returns.

FIG. 4 is a flowchart showing the operation at the time of turning on the power or selecting a channel. In step 401, the microcomputer 5 controls the audio circuit 4 to mute the audio, and in step 402, performs the channel selection control corresponding to the channel selection operation from the remote controller 7 to the demodulation circuit 3. In step 403, it is determined whether or not the mode has changed by the channel selection. If the mode has changed, the process proceeds to step 405. If the mode has not changed, the process proceeds to step 404.

When the process proceeds to step 405, the microcomputer 5 reads out the reference voice data and the voice correction data from the memory 6, and then adds the voice correction data to the reference voice data in step 406 to obtain the obtained volume level. After controlling the audio circuit 4 to output the audio signal of
At step 407, the audio mute is turned off and the routine returns.

On the other hand, when proceeding to step 404, the microcomputer 5 reads out the reference audio data, controls the audio circuit 4 so as to output an audio signal of the volume level of the reference audio data, and then proceeds to step 407. Then, the sound mute is turned off and the process returns. If the process proceeds to step 404, and if the reference audio data in the memory 6 has not been rewritten as it was before, the microcomputer 5 does not control the volume level of the audio circuit 4 and maintains the current state, and proceeds to step 407. You may make it go.

According to the present embodiment, when the signal source is switched from VHS to BS, for example, even if there is a difference in the reception volume level due to a difference in the broadcasting system or the like, the channel is selected. Then, the difference in volume level between the two signal sources can be automatically corrected. For this reason, the user can listen to the sound at a constant audible volume without adjusting the volume every time the signal source is switched by selecting a channel or the like, and the usability of the television receiver can be improved. .

[0026]

As described above, according to any one of the first to fifth aspects of the present invention, by setting the volume correction data for each signal source in advance, when the signal source is switched by performing channel selection or the like. For example, it is possible to automatically correct the volume difference of the output audio signal generated in the above-described manner, so that the output sound signal can be corrected to be substantially constant in terms of audibility.

According to the sixth aspect of the present invention, when selecting a broadcast station having a different reception volume level, the output volume level is automatically corrected so that there is no audible difference in the output volume level without manually adjusting the volume. Therefore, usability can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a television receiver employing a volume correction device at the time of signal source switching according to the present invention.

FIG. 2 is a view showing an example of a sound volume correction setting screen displayed on the remote controller shown in FIG. 1;

FIG. 3 is a flowchart showing a volume correction setting operation in the apparatus shown in FIG. 1;

FIG. 4 is a flowchart showing a volume control operation by the microcomputer shown in FIG. 1 when power is turned on or when a channel is selected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Television receiver 2 ... Antenna 3 ... Demodulation circuit 4 ... Audio circuit 5 ... Microcomputer 6 ... Memory 7 ... Remote controller 8 ... Speaker

Claims (6)

[Claims] 1. A volume correction setting means for presetting volume correction data for correcting a volume level of a switching destination signal source when a signal source is switched, for each signal source, and when the signal source is switched, Signal level switching means for adjusting a level of an output audio signal based on volume correction data corresponding to a switching destination signal source set in the volume correction setting means. Time volume correction device. 2. The sound volume correction setting means according to a sound volume level of an output sound set by a normal sound volume adjustment,
2. The volume correction device according to claim 1, wherein a volume level to be increased or decreased with respect to the volume level is set as volume correction data for each signal source. 3. The volume correction setting means sets a volume level to be increased or decreased with respect to a volume level of a specific signal source as volume correction data of another signal source based on a volume level of a specific signal source. The volume correcting device according to claim 1, wherein the signal source is switched at the time of signal source switching. 4. The volume correction at the time of signal source switching according to claim 3, wherein when setting the volume correction data, a user arbitrarily selects and sets a signal source having a reference volume level. apparatus. 5. The volume level control unit according to claim 1, wherein the volume level obtained by adding the volume correction data of the signal source of the switching destination set in the volume correction setting unit to the volume level currently set by normal volume adjustment. 5. The volume correcting device according to claim 2, wherein the level of the output audio signal is adjusted so as to obtain the volume level. 6. A television receiver capable of receiving a terrestrial broadcast, a satellite broadcast, or a cable television broadcast as a signal source, and further capable of externally inputting a signal source. A television receiver characterized by comprising a volume correction device of (1), wherein when the signal source is switched, the volume of the output audio signal is corrected using the volume correction device at the time of switching the signal source.