KR20000044753A - Method for adjusting volume by program kind in digital television - Google Patents

Abstract

PURPOSE: A method for adjusting volume by a program kind in a digital television is provided to output a predetermined volume level according to a changed program when the program is changed and stored after the volume level is predetermined by an user by broadcasting program kinds of each channel. CONSTITUTION: A method for adjusting a volume by a program kind in a digital television includes four steps. The first step is to determine and store a volume level by kinds of broadcasting programs of each channel among a plurality of broadcasting programs. The second step is to detect a broadcasting program kind from a received broadcasting signal when the broadcasting signal for a predetermined broadcasting channel of the plurality of broadcasting channels is received. The third step is to extract a predetermined volume information corresponding to the detected broadcasting program kind from the stored volume information by each broadcasting program kind. The fourth step is to output the volume on the received broadcasting signal as a level corresponding to the extracted volume information.

Description

Program volume control method in digital TV

The present invention relates to a volume adjusting method of a digital television, and more particularly, to a volume adjusting method of a digital television suitable for adjusting and outputting the volume for each type of various broadcasting programs provided from a plurality of broadcasting channels of the digital television. It is about.

In general, a digital television system compresses and transmits digital video and audio data using a predetermined compression algorithm, for example, a hybrid encoding algorithm, and restores the video and audio data that has been compressed and transmitted to the original data to serve a viewer. Thus, the information provided in such a digital television system can be broadly divided into program information, data information, and control information.

In a digital TV system, program information, data information, and control information are formed into a predetermined packet stream, for example, a packet stream in units of 188 bytes, and then carried on a carrier wave.

The program information indicates TV programs provided by each broadcaster for the purpose of being broadcast to subscribers, and includes video information, user information such as caption data, and audio information. The data information includes information defined according to the service provider, for example, electronic newspaper service information, magazine service information, karaoke service information, and the like.

Control information is a program such as program ID, channel ID, program name, caption service presence, program class, current time information, etc. necessary for demultiplexing and reconfiguring program information or data information of a selected channel from a packet stream carried on a carrier channel. It contains guide information and is generally written in PMT (Program Map Table).

Therefore, based on the control information included in the packet stream, the receiving side of the digital television automatically tunes to the carrier including the program of the selected channel, and then demultiplexes only the program information of the channel selected from the multiplexed and transmitted packet stream. By reconstructing, the program information is provided to the viewer. As a result, the digital television system provides not only broadcast program information but also various additional services not provided by the existing broadcast system, an electronic newspaper service, a magazine service, and a karaoke service, thereby expanding the information selection range of the viewer. There is an advantage.

In this conventional general digital television, the user presets the output volume for each type of broadcast program provided from each channel, and the output volume is preset by the user whenever the type of broadcast program the user is watching is switched. If you automatically convert to a level, you will be able to meet a wider variety of user needs.

The present invention has been made in view of the above points, the user presets the volume level for each broadcast program type of each channel and stores it, and when the program type is changed to output the preset volume level according to the type of the changed program The purpose is to provide a program-specific volume control method of digital television.

In order to achieve the above object, the present invention, by receiving a digital broadcast signal for a plurality of broadcast channels including a variety of broadcast programs to perform a predetermined signal processing process for the video signal and audio signal separated from the digital broadcast signal A method of automatically adjusting the volume of each program in an output digital television, comprising: a first step of setting and storing volume information for each broadcast program type for the plurality of broadcast programs; A second step of determining a type of a broadcast program from the received broadcast signal when a broadcast signal for any one of the plurality of broadcast channels is received; A third step of extracting preset volume information corresponding to the type of the determined broadcast program from the stored volume information for each type of broadcast program; And a fourth step of outputting a volume of the received broadcast signal in a size corresponding to the extracted volume information.

1 is a block diagram showing the configuration of a digital television suitable for applying the program-specific volume control method according to an embodiment of the present invention;

2 is a flowchart showing a volume control process for each program of a digital television according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: key input unit 20: control unit

30 tuner and demodulator 40 MPEG decoder

50: D / A converter 60: audio amplifier

70: speaker 80: memory

Hereinafter, a volume adjusting method of a digital television according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of a digital television suitable for applying a volume control method for each program according to a preferred embodiment of the present invention. The key input unit 10, the control unit 20, the tuner and the demodulator 30 are shown in FIG. ), An MPEG decoder 40, a D / A converter 50, an audio amplifier 60, a speaker 70, and a memory 80.

Referring to the figure, the key input unit 10 is composed of a key panel or a remote control, etc., provided in a digital television system, and includes a plurality of function keys including a channel selection key and a volume control key, and corresponds to a user's operation. The key signal is generated and provided to the controller 20. The control unit 20 controls the overall operation of the digital television in response to the key signal provided from the key input unit 10.

Under the control of the control unit 20, the tuner and demodulator 30 selectively receives a digital broadcast signal, demodulates it through a demodulation process corresponding to a modulation process on the transmission side, and then provides it to the MPEG decoder 40. The MPEG decoder 40 separates and decodes and outputs various additional information including audio data, video data, and program information from the demodulated broadcast signal provided from the tuner and the demodulator 30. At this time, the decoded video signal is displayed on the screen through an image signal processing means (not shown), and the audio signal is converted into an analog audio signal and output through the D / A converter 50 to be described later.

The audio amplifier 60 outputs the analog audio signal output from the D / A converter 50 through the speaker 70 by adjusting the output level of the audio signal, that is, the volume, under the control of the controller 20. .

Meanwhile, according to the present invention, the user can preset the volume for each broadcast program type in order to variably output the volume according to each broadcast program type, and the audio level for each broadcast program type set by the user is controlled by the controller 20. Is stored in a predetermined area of the memory unit 40 by the means.

When the channel change key signal is input from the key input unit 10 according to the present invention, the controller 20 generates a tuning control signal to the tuner and the demodulator 30 to switch to a channel corresponding to the input key signal. And determining the type of broadcast program received from the switched channel, for example, a music program, a sports program, a movie program, and the like, and extracting audio level information corresponding to the type of the corresponding program from the memory unit 80 to amplify the audio. By controlling the unit 60, the audio level preset by the user is output.

In addition, among the types of broadcast programs, the types of broadcast programs for which the user does not set the output audio level are output at the audio level of the program being viewed immediately. That is, while watching a certain broadcast program, when the channel switching or the currently watching broadcast program is terminated and switched to another arbitrary broadcast program, the user determines the type of the switched broadcast program and the user determines the type of the determined broadcast program. Preset audio level information is read. If the audio level information for the program is not set, the output audio level (volume) for the program is maintained by outputting the audio level that was previously output. The volume of digital televisions can be controlled efficiently.

2 is a flowchart illustrating a volume control process for each program of a digital television according to a preferred embodiment of the present invention. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

After the audio level information according to the type of each broadcasting program is preset by the user and stored in a predetermined area of the memory unit 80 (step 201), the overall operation of the digital television is operated in a power-off standby state (step 203, when the power is turned on by the user's key input unit 10 operation (step 205), the control unit 20 drives each component of the digital TV based on the input power on key signal. The controller 20 generates a tuning control signal to the tuner and the demodulator 30 to tune a preset broadcast channel (eg, the most recently watched past viewing channel or a broadcast channel preset by the user). (Step 207).

Subsequently, the controller 20 determines the type of the broadcast program received from the tuned broadcast channel (step 209), and then sets the audio level for each broadcast program set by the user and pre-stored in a predetermined area of the memory 80. From the information, audio level information corresponding to the broadcast program determined in step 209 described above is read (step 211). Then, the controller 20 generates a control signal to the audio amplifier 60 based on the read audio level information, thereby outputting a volume corresponding to the audio level preset by the user (step 213). The video signal of the broadcast channel is displayed through a video signal processor (not shown).

Through the above-described process, a volume having a size corresponding to the type of broadcast program currently received is output, and while the overall operation of the digital television is operated in the normal viewing mode (step 215), the user's channel switching or present If the type of the broadcast program received is changed due to the termination of the broadcast program being viewed (step 217), the control unit 20 detects it from the broadcast program information inserted in the broadcast signal and repeats the process after step 209 described above. In this case, the type of the changed program is determined, audio level information corresponding to the type of the determined program is read, and the audio signal for the changed broadcast program is output at a volume of a preset size by the user. This process is repeatedly performed until the power off key signal is input (step 219) and the operation of the digital television is switched to the standby mode (step 221).

As a result, the process as described above is repeated to determine the type of the changed program, and then the audio level of the changed program is adjusted to a level preset by the user and output.

As described above, according to the present invention, the user can preset the audio output level for each type of broadcast program and automatically change the audio level according to the type of the broadcast program to watch each broadcast program. There is an effect that can satisfy the needs of various users, and the effect that can improve the overall function of digital television.

Claims (1)

In digital TV, which receives digital broadcast signals for a plurality of broadcast channels including various types of broadcast programs and outputs a predetermined signal processing process for video signals and audio signals separated from the digital broadcast signals, volume of each program is automatically adjusted. In the method of adjusting to, A first step of setting and storing volume information for each broadcast program type for the plurality of broadcast programs; A second step of determining a type of a broadcast program from the received broadcast signal when a broadcast signal for any one of the plurality of broadcast channels is received; A third step of extracting preset volume information corresponding to the type of the determined broadcast program from the stored volume information for each type of broadcast program; And a fourth step of outputting a volume of the received broadcast signal in a size corresponding to the extracted volume information.