KR20110006867A - Method for controling output of audio signal and broadcasting receiver enabling of the method - Google Patents

Abstract

PURPOSE: An output controlling method of a broadcasting receiver preventing the increase of the sudden volume is provided to output an alarm message according to the input of a volume increase command about the output of the image signal. CONSTITUTION: A broadcasting receiver determines the existence of the audio signal within an outputting image signal. The broadcasting receiver receives a volume increase command from a user(S202). In case the audio signal is not included within the video signal, the broadcasting receiver generates a warning message(S203). The broadcasting receiver outputs the generated warning message(S205). In case the audio signal is included within the video signal, the broadcasting receiver increases the output of the speaker(S206).

Description

Output control method of broadcast receiver and broadcast receiver employing the method {METHOD FOR CONTROLING OUTPUT OF AUDIO SIGNAL AND BROADCASTING RECEIVER ENABLING OF THE METHOD}

The present invention relates to a method for controlling output of a broadcast receiver and a broadcast receiver employing the method. More particularly, when a volume increase command is received, a warning message is output when an output video signal does not include an audio signal. The present invention relates to a method of operating a broadcast receiver and to a broadcast receiver employing the method, which prevents a sudden increase in volume, thereby increasing user convenience.

Today, with the development of video technology, digital broadcast receivers have been developed for receiving and outputting digital broadcast signals, which are processed by receiving digital broadcast signals received from a network-connected external input device or from broadcast stations. And then print.

Meanwhile, as digital broadcast signals received by digital broadcast receivers are diversified, not only broadcast signals including video signals and audio signals, but also data broadcast signals composed only of data are becoming more common.

However, when a digital broadcasting receiver outputs a data broadcasting signal that does not include an audio signal, the user may think that the speaker output is small and increase the volume output by increasing the volume key. When the channel is switched in the closed state, the audio signal is output at the increased volume, which may cause the user to be surprised or adversely affect the user's hearing.

FIG. 1 is a diagram illustrating an embodiment in which a speaker output is adjusted according to a volume increase command in a conventional digital broadcast receiver.

Referring to FIG. 1, when the user inputs a channel change command in step S101 and a volume increase command in step S102, the broadcast receiver of the related art is in step S103 corresponding to the volume increase command. Increase speaker output. Next, when the user switches the channel in step S104, the broadcast receiver outputs an audio signal of increased volume in step S105.

Accordingly, such a prior art digital broadcast receiver increases speaker output in response to a volume increase command regardless of whether a data broadcast signal or a general broadcast signal is output, thereby increasing the volume of the user when the user switches channels. As a result, the audio signal is output, and the user may be surprised or have a problem that may adversely affect the user's hearing.

The present invention has been made to solve the above problems of the prior art, when outputting a video signal that does not include an audio signal, such as data broadcasting, when the user inputs a volume increase command, by outputting a warning message, To provide a broadcast receiver output control method and a broadcast receiver employing the method to solve the problem that the user may be surprised or adversely affect the user's hearing as the audio signal is output at an increased volume. For that purpose.

An output control method of a broadcast receiver according to an embodiment of the present invention comprises the steps of: receiving an image signal and outputting the image signal; Determining whether an audio signal is included in the output image signal; Receiving a volume increase command from a user; Generating a warning message when the output video signal does not include an audio signal; And outputting the generated warning message.

At this time, the output control method of the broadcast receiver may further comprise the step of not increasing the output of the speaker in response to the volume increase command when the audio signal is not included in the output image signal.

The video signal may be a digital broadcast signal.

The determining whether the audio signal is included in the output image signal may include receiving a channel change command from the user and including an audio signal in a digital broadcast signal that is changed in response to the channel change command. Determining whether there is any.

The determining whether the audio signal is included in the output video signal may include determining whether the digital video signal includes an audio signal by referring to a predetermined table included in the digital video signal. It may be characterized in that it comprises a.

The determining of whether the output video signal includes an audio signal may include determining whether the digital video signal is a data broadcast signal, and in the case of the data broadcast signal, determining that the audio signal is not included. It may be characterized in that it comprises a.

The output control method of the broadcast receiver may further include increasing an output of a speaker in response to the volume increase command when an audio signal is included in the output video signal.

In addition, the broadcast receiver according to another embodiment of the present invention comprises an image processing unit for receiving an image signal and outputs the image processing; A user interface unit to receive a volume increase command from a user; A controller which determines whether an audio signal is included in the output video signal and generates a warning message when the audio signal is not included in the output video signal; And a display unit for outputting the generated warning message.

At this time, if the audio signal is not included in the output image signal, the controller does not increase the output of the speaker in response to the volume increase command.

In addition, the video signal may be a digital broadcast signal.

The controller may be further configured to receive a channel change command from the user and determine whether an audio signal is included in the digital broadcast signal that is changed in channel in response to the channel change command.

The controller may determine whether an audio signal is included in the digital video signal by referring to a predetermined table included in the digital video signal.

The controller may determine whether the digital video signal is a data broadcast signal, and, in the case of the data broadcast signal, determine that an audio signal is not included.

The controller may increase an output of a speaker in response to the volume increase command when an audio signal is included in the digital broadcasting signal being output.

The present invention outputs a warning message when a user inputs a volume increase command when outputting a video signal that does not include an audio signal such as a data broadcast, so that the user may be surprised to output an audio signal at an increased volume. Therefore, there is an effect to solve the problem that may adversely affect the user's hearing.

Hereinafter, a method for controlling output of a broadcast receiver and a broadcast receiver employing the method will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating a process of controlling the output of an image signal according to an embodiment of the present invention. FIG. 2 illustrates a configuration in which a broadcast receiver determines whether an audio signal is present in an output video signal and outputs a warning message when there is no audio signal, but not only when switching channels, but also from an external input device. In the case of receiving and outputting the received video signal, the process of FIG. 2 may be applied.

Referring to FIG. 2, in step S201, the broadcast receiver receives a channel switch command from a user, processes an image signal received in the switched channel, and outputs the image signal. In this case, the output image is described as an example of being received in the switched channel, but is also applicable to the case where the input is switched to the external input device and received from the external input device.

In step S202, the broadcast receiver receives a volume increase command. The volume increase command may be received from a predetermined external input means (for example, a remote controller, etc.) or may be received from a key input means mounted on a broadcast receiver.

In operation S203, the broadcast receiver determines whether an audio signal is included in the output video signal.

When the video signal is a digital broadcast signal, the broadcast receiver determines whether the digital broadcast signal includes an audio signal by referring to a predetermined table included in the digital video signal, or determines whether the digital video signal is a data broadcast signal. In the case of a data broadcast signal, it is determined that an audio signal is not included.

For example, the broadcast receiver may determine whether an audio signal is included in the digital broadcast signal by referring to a predetermined table of the PSIP of the broadcast signal received by the tuner.

Program and System Information Protocol (PSIP) parses messages encoded by MPEG-2 (Moving Picture Experts Group) (ISO / IEC 13818-1 system), and the like, to parse various information about a broadcast program. It is defined to provide. PSIP basically has a skeleton similar to the program and system information (PSI) of the MPEG system, and transmits and receives A / V data in MPEG-2 video and AC-3 audio formats, and provides information on the channels of each broadcasting station. It is composed of several tables to transmit information about each program.

Tables may be transmitted in divided sections. According to a protocol such as PSIP, a broadcast receiver such as a digital TV may select a channel to support a main function of providing A / V service of a desired broadcast and an EPG of a broadcast program, that is, an additional function of providing a broadcast guide service.

Example of a table including information on whether the audio signal is included In one embodiment, it may be a Program Map Table (PMT) or a Virtual Channel Table (VCT). An example of the configuration of the PMT and the VCT will be described with reference to FIGS. 3 and 4.

As a result of the determination in step S203, when the video signal being output does not include an audio signal, the broadcast receiver generates a warning message in step S204, and outputs the warning message generated in step S205.

At this time, the broadcast receiver does not increase the output of the speaker in response to the volume increase command in step S202.

If it is determined in step S203 that the audio signal is included in the video signal being output, in step S206 the broadcast receiver increases the output of the speaker in response to the volume increase command.

FIG. 3 is a diagram illustrating Program Map Table (PMT) syntax according to an embodiment of the present invention.

The PMT (Program Map Table) is a table that carries information of a program that may exist in each physical channel. There is audio_pid, video_pid, teletext_pid, pcr_pid information that composes the program. By using this information, the broadcast receiver may construct a table.

Accordingly, the PMT table represents information about a program broadcast in each channel.

Referring to the basic PMT transmission, the PMT can be received by parsing the 'packet ID' in which the PMT is transmitted in a Program Association Table (PAT) in which the 'packet ID' is defined as '0x00'.

Since there is audio_pid constituting a program in the PMT, the broadcast receiver of the present invention may determine this as an audio identification field to determine whether an audio signal is included in the program.

4 is a diagram illustrating a virtual channel table (VCT) syntax according to an embodiment of the present invention.

The VCT is a table containing information of programs that may exist in each physical channel.

The VCT is divided into 256 sections and one section can carry several virtual channel information, but the information on one virtual channel is not divided into two or more sections.

The bit stream syntax of the terrestrial VCT includes a transport stream ID, a channel number (major_channel_number, minor_channel_number), short_name, carrier_frequency, program_number, and the like, and additional information is contained in a VCT descriptor.

In this case, program_number is indicated to connect a virtual channel in which MPEG-2 PAT (Program Association Table) and PMT (Program Map Table) are defined, and corresponds to a program number in the PAT / PMT.

Here, PAT describes the components of the program for each program number, which indicates the PID of the transport packet for transmitting the PMT. The PMT describes the program identification number and the PID list of the transport packet in which the individual bit strings such as video and audio constituting the program are transmitted and the attached information.

Accordingly, the broadcast receiver of the present invention may determine whether the audio signal is included in the broadcast signal received in the corresponding channel by reading the PID list in the PMT.

5 is a diagram illustrating an example of a warning message according to the present invention.

Referring to FIG. 5, if an audio signal is not included in an output or channel switched video signal, the broadcast receiver outputs a warning message such as reference numeral 501. For example, the warning message may be generated and output through the OSD.

Therefore, the user recognizes that the video signal being output or switched channel does not include the audio signal, and no longer inputs the volume increase command, so that the user may be surprised or hearing from the increased volume even when switching to the next channel. May not be adversely affected.

Accordingly, the present invention outputs a warning message when a user inputs a volume increase command when outputting a video signal that does not include an audio signal such as data broadcasting, so that the audio signal is output at an increased volume. Has an effect of solving a problem that may surprise or adversely affect the user's hearing.

6 is a block diagram illustrating a configuration of a broadcast receiver for controlling output according to an embodiment of the present invention.

As shown in FIG. 6, the broadcast receiver according to an embodiment of the present invention includes a tuner unit 10, a demodulator 12, a demultiplexer 14, an audio / video decoder unit 16, The display unit may include an A / V and OSD 18, a PSI / PSIP decoder 24, a controller 20, a user interface 28, and a memory 26. At this time, the image processing unit which receives the image signal, processes the image, and outputs the image signal includes a tuner unit 10, a demodulator 12, a demultiplexer 14, an audio / video decoder unit 16, and a display unit A. / V and OSD, 18).

The broadcast receiver is, for example, a digital television (DTV) capable of receiving digital broadcasts, and the tuner unit 10 receives a digital broadcast signal including a program and system information / program and system information protocol (PSI / PSIP) table.

In particular, the PSI / PSIP table includes a program map table (PMT) and a virtual channel table (VCT).

The demodulator 12 is responsible for demodulating the signal tuned by the tuner 10 into a VSB / EVSB (Vestigal Side Band / Enhanced Vestigal Side Band) signal.

The demultiplexer 14 demultiplexes the audio data, the video data, and the PSI / PSIP table data from the signal demodulated by the demodulator 12.

The demultiplexing of the audio data and the video data is controlled by the control unit 20, and the demultiplexing of the PSI / PSIP table data is controlled by the PSI / PSIP decoder unit 24.

The demultiplexed PSI / PSIP table is transmitted to the PSI / PSIP decoder 24, and the demultiplexed audio data and video data are transmitted to the audio / video decoder 16.

The audio / video decoder 16 decodes the received data, and the PSI / PSIP decoder 24 parses the PSI / PSIP section. In this case, the audio identifier information may be detected in a table in the PSI and PSIP of the broadcast signal.

Meanwhile, in relation to the present embodiment, the demultiplexer 14 demultiplexes PMT, VCT, and the like, and transmits the demultiplexer 14 to the PSI / PSIP decoder 24.

The user interface unit receives a volume increase command from the user.

The controller 20 determines whether an audio signal is included in the video signal being output, that is, the digital broadcast signal, and generates a warning message when the audio signal is not included in the output video signal.

The display unit 18 outputs the generated warning message.

At this time, if the audio signal is not included in the output video signal, the controller 20 does not increase the output of the speaker in response to the volume increase command.

In addition, according to an exemplary embodiment, the controller 20 may receive a channel change command from a user and determine whether an audio signal is included in the digital broadcast signal that is changed in channel in response to the channel change command.

In addition, the controller 20 may determine whether an audio signal is included in the digital video signal by referring to a predetermined table included in the digital video signal, which is a program map table (PMT) which is a PSI / PSIP table. ), May be a VCT (Virtual Channel Table) as described above.

In addition, the controller 20 may determine whether the digital video signal is a data broadcast signal, and, in the case of the data broadcast signal, determine that an audio signal is not included.

In addition, when an audio signal is included in the output digital broadcasting signal, the controller 20 may increase the output of the speaker in response to the volume increase command.

The broadcast receiver according to the present invention has been described so far, and the technical details described in the above embodiments may be applied to the broadcast receiver of FIG. 6, and thus the detailed description thereof will be omitted below.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

1 is a diagram illustrating an embodiment in which a speaker output is adjusted according to a volume increase command in a digital broadcasting receiver of the related art.

2 is a diagram illustrating a process of controlling an output of an image signal according to an embodiment of the present invention.

3 is a diagram illustrating Program Map Table (PMT) syntax according to an embodiment of the present invention.

4 is a diagram illustrating a virtual channel table (VCT) syntax according to an embodiment of the present invention.

5 shows an example of a warning message according to the invention.

6 is a block diagram illustrating a configuration of a broadcast receiver for controlling output according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: tuner part 12: demodulation part

14 demultiplexer 16 audio / video decoder

18: display unit 20: control unit

24: PSI / PSIP decoder section 26: memory section

Claims (14)

In the output control method of the broadcast receiver, Receiving and outputting an image signal after image processing; Determining whether an audio signal is included in the output image signal; Receiving a volume increase command from a user; Generating a warning message when the output video signal does not include an audio signal; And Outputting the generated warning message Output control method of a broadcast receiver comprising a. The method of claim 1, Not increasing the output of the speaker in response to the volume increase command when the output video signal does not include an audio signal Output control method of a broadcast receiver further comprising. The method of claim 1, And the video signal is a digital broadcast signal. The method of claim 3, Determining whether or not the audio signal is included in the output video signal, And receiving a channel change command from the user and determining whether an audio signal is included in the digital broadcast signal that is changed in channel in response to the channel change command. The method of claim 3, Determining whether or not the audio signal is included in the output video signal, Determining whether an audio signal is included in the digital video signal by referring to a predetermined table included in the digital video signal Output control method of a broadcast signal comprising a. The method of claim 3, Determining whether or not the audio signal is included in the output video signal, Determining whether the digital video signal is a data broadcast signal and determining that the digital video signal does not include an audio signal. Output control method of a broadcast signal comprising a. In claim 1, If the output video signal includes an audio signal, increasing the output of the speaker in response to the volume increase command Output control method of a broadcast signal further comprising. In a broadcast receiver, An image processor which receives an image signal, processes the image, and outputs the image signal; A user interface unit to receive a volume increase command from a user; A controller which determines whether an audio signal is included in the output video signal and generates a warning message when the audio signal is not included in the output video signal; And A display unit for outputting the generated warning message Broadcast receiver comprising a. The method of claim 8, The controller does not increase the output of the speaker in response to the volume increase command when the audio signal is not included in the output video signal. The method of claim 8, And the video signal is a digital broadcast signal. The method of claim 10, The control unit, And receiving a channel change command from the user and determining whether an audio signal is included in the digital broadcast signal that is changed in channel in response to the channel change command. The method of claim 10, The control unit, And determining whether an audio signal is included in the digital video signal by referring to a predetermined table included in the digital video signal. The method of claim 10, The control unit, And determining that the digital video signal is a data broadcast signal, and determining that the digital video signal does not include an audio signal. In claim 8, And the controller increases the output of the speaker in response to the volume increase command when the output digital broadcast signal includes an audio signal.

Images