KR20000021455A - Method for controlling audio signal level in tv - Google Patents

Abstract

PURPOSE: A method for controlling an audio signal level in a TV is provided to compensate the difference between an output level of the audio signal, and to identify the output level of the audio signal and an audio signal output level, received to a public switched broadcasting channel, when changing the public switched broadcasting channel to a cable channel or a broadcasting satellite channel, while watching the public switched broadcasting channel. CONSTITUTION: A method for controlling an audio signal level in a TV comprises the steps of: deciding whether broadcasting signal inputted according to channel change is public switched broadcasting or a broadcasting satellite/cable broadcasting; detecting an audio signal level of the public switched broadcasting, when the broadcasting signal is the public switched broadcasting, storing in a memory, and outputting; detecting an audio signal level of the cable broadcasting when it is the satellite or the cable broadcasting, and comparing with the audio signal level of the stored public switched broadcasting; and compensating the difference to identify the audio signal level of the cable broadcasting with the audio signal level of the public switched broadcasting, when the audio signal level of the cable broadcasting and the audio signal level of the public switched broadcasting are not identified, and outputting the audio signal level of the cable broadcasting or the satellite.

Description

How to control audio signal level on TV

The present invention relates to a method for controlling the audio signal level of a television. More particularly, the volume output level of each channel is the level of the public network broadcast when the TV tuner is connected to the broadcasting, satellite broadcasting, VTIAL and cable broadcasting through the public network. The present invention relates to a method for controlling an audio signal level of a television to be output in the same manner as in FIG.

In general, a television receiver receives a broadcast signal from the public and not only watches a TV, but also uses a VTV connected to the outside of the television receiver, connects a satellite broadcast receiver to watch a satellite broadcast channel, and is wired. It can be used in various modes such as watching a cable broadcasting channel by connecting a broadcasting converter.

In the case of watching television by receiving only the broadcast signal through the television receiver, the volume output level is the same for each channel between the public broadcasts, and therefore the viewer does not change the volume level that the viewer listens to even if the public broadcast channel is changed. Broadcasting at the same volume as one volume is possible.

However, when a device such as VTIAL is connected to the outside of a TV receiver, a satellite broadcast receiver is connected to receive a satellite broadcast, and a cable broadcast is received and a normal broadcast channel is changed, or vice versa. Since the intensity varies depending on the corresponding broadcast channel, and the intensity may change during propagation of radio waves, the volume output level may not be kept constant for each channel. Therefore, when a user watches another broadcasting channel, that is, a cable broadcasting or a satellite broadcasting while watching a public network broadcast, there is a hassle of changing a channel and adjusting a desired volume level again.

Accordingly, the present invention has been made to solve the above-mentioned problems, and its purpose is to receive the audio signal output level of a television through a public network broadcast channel even when the public network broadcast channel is changed to a cable broadcast channel or a satellite broadcast channel. An object of the present invention is to provide an audio signal level control method of a television, in which a difference between audio signal output levels is corrected to be equal to the audio signal output level.

1 is a schematic block diagram of an audio signal level control apparatus of a television for implementing the present invention.

2 is a flowchart illustrating a method of controlling an audio signal level of a television according to the present invention.

Explanation of symbols on the main parts of the drawings

10 Tuner 20 Video intermediate frequency amplifier

30 ... voice intermediate frequency amplifier 40 ... FM detector

50 ... Volume adjustment section 60 ... Speakers

70 ... Memory 80 ... Volume selector

90 ... channel selector 100 ... control unit

In order to achieve the above object, an audio signal level control method of a television according to the present invention comprises the steps of: (a) determining whether a broadcast signal input according to a channel change is over-the-air, satellite, or cable broadcasting; A) As a result of the determination, in the case of over-the-air broadcasting, detecting and outputting the audio signal level of the over-the-air broadcasting in a memory; Detecting the audio signal level and comparing it with the audio signal level of the airwaves stored in step (b); and (d) as a result of the comparison of the step (c), the audio signal level of the over-the-air broadcasting and the audio signal level of the satellite or cable broadcasting are If it is determined to be inconsistent, the audio signal level of the satellite or cable broadcasting is equal to the audio signal level of the airwave broadcasting. Compensating the difference so that the difference is corrected, and (e) if a volume change signal is input by the viewer, the airwave level output in steps (b) and (d) and the audio signal level of satellite or cable broadcasting. It characterized in that it comprises a step of adjusting the volume change amount in accordance with each.

Hereinafter, the configuration and operation of an audio signal level control method of a television according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, Figure 1 is a block diagram showing a schematic configuration of an audio signal level control apparatus of a television for implementing the present invention. As shown in FIG. 1, an apparatus for controlling an audio signal level of a television for implementing the present invention includes a tuner unit 10 that tunes a desired channel from a received broadcast wave and outputs an intermediate frequency (IF) signal, and a tuner. An image intermediate frequency amplifying unit 20 for separating the intermediate frequency signal output from the unit 10 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF, and an audio intermediate for amplifying the separated audio intermediate frequency signal. A frequency amplifier 30, an FM detector 40 which extracts an original signal before frequency modulation (FM) from the voice intermediate frequency signal amplified to a predetermined level, and a volume output level of the corresponding channel. A volume adjuster 50 for adjusting the input volume selector 80 and an audio signal level before modulation output from the FM detector 40 to a volume output level selected by the viewer by the volume selector 80; , Adjust volume A speaker 60 for outputting the audio signal of the level adjusted by 50 as an audible sound, a channel selector 90 for selecting a channel to be watched by the viewer, and an audio signal level detected from the over-the-air broadcasting The memory 70 controls the drive of the tuner 10 so as to receive broadcast radio waves of the corresponding channel input from the channel selector 90, and outputs an audio signal of a volume level selected from the volume selector 80. The control part 100 which controls the adjustment part 50 is provided.

Referring to the operation of the present invention by the above-described configuration, the tuner (tuner) 10 selectively receives the broadcast wave of the channel to be received in the broadcast signal input from the antenna for receiving the public network broadcast, the cable broadcast receiver and the satellite broadcast receiver. After amplifying and outputting the signal by converting the signal into an intermediate frequency signal of video and audio, the intermediate frequency amplifier 20 amplifies the video signal and the audio signal input from the tuner unit 10 and then the intermediate video signal. (Picture Intermediate Frequency (PIF) and Sound Intermediate Frequncy (SIF) are separated and output.

In addition, the audio intermediate frequency amplifier 30 amplifies the audio intermediate frequency signal output from the image intermediate frequency amplifier 20 by a predetermined level and inputs it to the FM (Frequency Modulation) detector 40. The FM detector 40 detects the original signal before the frequency modulation, that is, the audio signal of the base band band, from the voice intermediate frequency signal and outputs it to the volume adjusting unit 50. The volume adjusting unit 50 sets the volume output level set by the viewer. The output level of the audio signal is adjusted and output to the speaker 60. The volume adjusting unit 50 receives an increase and decrease signal of a voice signal level according to a viewer's manipulation through a conventional remote controller (hereinafter, referred to as a remote controller) and inputs the same to the controller 100. In addition, the volume adjusting unit 50 amplifies and outputs an audio signal input to, for example, a low frequency amplifier with a predetermined amplification degree (gain).

The channel selector 90 inputs a broadcast channel to be watched, receives a channel increase and decrease signal from a remote controller, or receives a specific channel number and transmits it to the controller 100. The channel selector 90 may input both a public broadcast channel that can be received through a public network, a satellite broadcast channel that is received through a satellite communication receiver, and a wired broadcast channel through a cable broadcast receiver.

The controller 100 checks an increase and decrease request signal of the volume output level input through the volume selector 80, outputs a control signal to the volume adjuster 50, and a channel input through the channel selector 90. The change signal is checked to output a control signal for controlling channel selection of the tuner unit 10. In addition, the control unit 100 receives an audio signal amplified by a predetermined level from the voice intermediate frequency amplifier unit 30 and whether the received audio signal is a signal of a public broadcasting channel or a cable broadcasting channel according to a channel change of a viewer. It determines whether or not the signal of the satellite broadcast channel, and the detailed operation thereof will be described in the following flowchart.

2 is a flowchart illustrating a method of controlling an audio signal level of a television according to the present invention. As shown in FIG. 2, in the method of controlling an audio signal level of a television according to the present invention, first, in step S10, the controller 100 checks an input signal from the channel selector 90 so that a channel change request signal is input. Judge whether or not. When the channel change request signal is input in step S10, the channel tuning is performed by controlling the drive of the tuner unit 10 to receive the broadcast signal of the changed channel in step S12. In step S14, it is determined whether the broadcast signal inputted from the tuned channel is a public network broadcast channel, a satellite broadcast channel or a cable broadcast channel. For example, since public network broadcasting, satellite broadcasting, and wire broadcasting use different frequency bands, the broadcasting signal can be determined by detecting the frequency band of the input broadcasting signal.

On the other hand, in step S16, it is determined whether the broadcast signal determined in the step S14 is public network broadcast. If the result is the public network broadcast, the process proceeds to step S18 to detect the audio signal level of the input broadcast signal. The detected audio signal level is stored in the corresponding storage area of the memory 70 in step S20.

In step S22, it is determined whether the volume change request signal is input by checking the presence or absence of an input signal from the volume selector 80. If it is determined that the volume level increase and decrease request signal is input, the process proceeds to step S24. By controlling the volume adjusting unit 50 to adjust the currently set volume level to the changed volume output level. That is, the volume adjusting unit 50 adjusts the volume level by increasing the amplification degree (gain) when the changed volume output level is larger than before the change, and lowering the amplification degree when it is smaller. Meanwhile, in step s26, the audio signal of the volume level adjusted in the step s24 is output through the speaker 60.

As a result of the determination in step S16, when the broadcast signal inputted from the changed channel is other than the airwave broadcasting, the process proceeds to step S28. In step S28, it is determined whether the input broadcast signal is a cable broadcast or satellite broadcast signal. In operation S30, when it is determined that the broadcast signal of the changed channel is a wired or satellite broadcast signal, the audio signal level of the corresponding broadcast signal is detected. In step S32, the audio signal level detected in step S30 is compared with the audio signal level of the over-the-air broadcasting stored in the memory 70 in step S20.

According to the result of the comparison, in step S34, it is determined whether the audio signal level of the over-the-air broadcast and the audio signal level of the wired or satellite broadcast coincide with each other. If the result of the determination matches, step S22 or less is repeated, and if not, step s36 is performed. That is, in step s36, the difference between the audio signal level of the satellite (or wired) broadcast and the audio signal level of the over-the-air broadcast is compensated for, so that the audio signal level of the satellite (or wired) broadcast and the audio signal level of the over-the-air broadcast are output identically. To be possible. Subsequently, if there is a volume change by performing the step s22 or below, the volume output level is changed by the volume change amount based on the corrected audio signal level to output the audio signal of the corresponding volume level to the speaker 60.

The audio signal level control method of the television according to the present invention is not limited to the above-described embodiments, and may be modified in various ways within the scope of the technical idea of the present invention. For example, in the case of using a VTR connected to a television as well as satellite and cable broadcasting, the audio signal level of a broadcast signal input from VTial is determined in the same manner as the above-described method. By correcting to match and outputting the audio signal according to the corrected audio signal level, the audio signal of the same level as when watching the over-the-air broadcasting channel can be output even when watching the channel using VTIAL.

In addition, the method of controlling the audio signal level of a television according to the present invention is different from the above-described embodiment in the case of using a cable broadcasting receiver in the case of using a cable broadcasting converter or a VTV connected to the television. It can be used embedded in VTI's tuner.

As described above, the audio signal level control method of the television according to the present invention, even when watching the over-the-air broadcasting channel to the cable broadcasting or satellite broadcasting channel to watch the difference in the audio input signal level according to the difference between each broadcasting channel By compensating for the control to match the audio input signal level of the over-the-air broadcasting to solve the problem that the viewer needs to readjust the volume in addition to the channel change to provide an effect that can improve the convenience of the viewer.

Claims (1)

(A) determining whether a broadcast signal input according to a channel change is over-the-air or satellite or cable broadcasting; (B) in the case of the airwave broadcasting as a result of the determination in step (a), detecting the audio signal level of the airwave broadcasting, storing it in a memory, and outputting the same; (C) if the determination result of step (a) is a satellite or cable broadcasting, detecting the audio signal level of the satellite or cable broadcasting and comparing it with the audio signal level of the airwave stored in the step (b); (D) If the comparison result of step (c) determines that the audio signal level of the over-the-air broadcast and the audio signal level of the satellite or the cable broadcasting do not match, the audio signal level of the satellite or the cable broadcasting is compared with the audio signal level of the over-the-air broadcasting. Compensating the difference to match and outputting the difference; (E) adjusting the volume change amount according to the airwave level output in the step (b) and step (d) and the audio signal level of satellite or cable broadcasting, respectively, when the volume change signal by the viewer is inputted; A method of controlling the audio signal level of a television.