KR100672393B1 - Information Output Method of digital Broadcasting Receiver When Changed Channel - Google Patents

Abstract

The present invention relates to a method of outputting information when changing a channel of a digital broadcast receiver that can prevent a temporary freeze of a screen when changing a channel of a digital broadcast receiver.

When the channel is changed, the information output method of changing the channel of the digital broadcast receiver of the present invention is characterized in that it comprises the step of displaying specific data on the screen during the preparation period until one screen of the changed channel is output.

According to the present invention, information useful to the user, such as commercial broadcasting and emergency message broadcasting, and EPG information through PSIP, can be displayed on a screen during a blank period inevitably occurring during channel change.

Description

Information output method of digital broadcasting receiver when changed channel}             

1 is a block diagram showing a broadcasting station system applied to the present invention.

2 is a block diagram showing a digital broadcast receiver applied to the present invention.

3 is a flowchart illustrating a method of outputting information when changing a channel of a digital broadcasting receiver according to an exemplary embodiment of the present invention.

<Brief description of symbols for the main parts of the drawings>

2: MPEG2 Encoder 4: Data Server

6: stream server 8: stream storage unit

10: VSB modulator 12: VSB demodulator

14: MPEG2 decoder 16: NTSC decoder

18: channel tuner 20: CPU

22: memory

The present invention relates to a method of outputting information when changing a channel of a digital broadcast receiver that can prevent a temporary freeze of a screen when changing a channel of a digital broadcast receiver.

Recently, a test broadcast for digital TV broadcasting is in full swing. However, unlike a general TV, in the case of a digital TV, the amount of information is very large, resulting in various side problems. When one of the channels switches, the digital TV receiver fills the blank screen with the blank screen while receiving the amount of data on one screen, which is about 1 to 2 seconds depending on the digital TV and station conditions. Accordingly, the viewer was forced to experience the visual inconvenience of having to watch the black screen by pausing the screen for a period corresponding to about 1 second to 2 seconds (3 to 4 seconds long) every time the channel is changed. However, the problem of freezing the screen at the time of changing the channel is a fundamental problem occurring in the characteristics of the digital TV itself, and there is no way to solve it with the current technology. In other words, since the number of channels of digital broadcasting is quite large, when the digital TV changes the channel while simultaneously decoding the programs of all these channels, there is no problem of the black screen display, but it is impossible to make a decoder that implements this in reality. Accordingly, there has been a demand for a broadcast service company and a viewer to use a method without visual inconvenience to the viewer during the blank period during channel change.

Accordingly, an object of the present invention is to provide a method of outputting information when changing a channel of a digital broadcasting receiver, which can effectively utilize a blank period when changing a digital TV channel.

In order to achieve the above objects, the method of outputting information when changing a channel of a digital broadcasting receiver according to the present invention includes the step of causing specific data to be displayed on the screen during a preparation period until one screen of the changed channel is output when the channel is changed. It is characterized by including.

Other objects and advantages of the present invention in addition to the above object will become apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

1 is a system diagram of a broadcast service company, that is, a broadcasting station, applied to a method of outputting information when a channel is changed by a digital broadcasting receiver according to an exemplary embodiment of the present invention. The system of the broadcasting station of FIG. 1 includes a stream server 6 for providing programs to be serviced, a stream storage unit 8 for storing programs from the stream server 6, and a stream storage unit 8; MPEG2 encoder (2) for reading the programs stored in the digital conversion in real time by the MPEG2 (Motion Picture Experts Group) method, and a data server (4) for providing data broadcasts such as advertisements and emergency messages; And a VSB modulator 10 for transmitting a VSB (Vestigial Side Band) modulated data signal from the MPEG2 encoder 2 and the data server 4 for terrestrial broadcasting. The stream server 6 provides programs to be broadcasted by a broadcasting station and stores them in the stream storage unit 8. The MPEG2 encoder 2 reads programs stored in the stream storage unit 8, digitally converts the MPEG2 scheme, and outputs the converted signals. The MPEG2 encoder 2 transmits the VSB modulated through the VSB modulator 10. The data server 4 performs data broadcasting through a spare channel during program broadcasting from the MPEG2 encoder 2. In addition, the data server 4 may provide an advertisement or an emergency message through data broadcasting so that the digital broadcasting receiver may display an advertisement or a message broadcasting broadcast on the data broadcasting during the blank period when the channel is changed.

2 is a block diagram illustrating a digital broadcast receiver according to the present invention. The digital broadcast receiver of FIG. 2 includes a VSB demodulator 12 for VSB demodulation of the received terrestrial broadcast, an MPEG2 decoder 14 for decoding the broadcast signal from the VSB demodulator 12 in an MPEG2 scheme, and an MPEG2 decoder 14 NTSC decoder 16 for decoding the output signal from the NTSC method, a channel tuner 18 for controlling a broadcast channel received by the VSB modulator 12, a channel tuner 18 and an MPEG2 decoder 14 ) And a memory 22 connected to the CPU 20. The VSB demodulator 12 demodulates and outputs the terrestrial broadcast received by the control of the channel tuner 18 in a VSB manner. The broadcast signal output from the VSB demodulator 12 includes video and audio signals and data signals. The MPEG2 decoder 14 decodes and outputs the broadcast signal output from the VSB modulator 12 in the MPEG2 method under the control of the CPU 20, and the NTSC decoder 14 outputs the NTSC (the output signal from the MPEG2 decoder 14). National Television Standards Committee) to decode and display on the screen. When the user changes the channel, the central processing unit (CPU) 20 causes the commercial or emergency message broadcast received in the form of data broadcast to be displayed on the screen during the blank period. In addition, when data broadcasting is not performed in the broadcasting system, the CPU 20 displays the electronic program guide (EPG) through PSIP (Program System and Information Protocol) information included in the received broadcasting program, thereby broadcasting the changed channel. Information can also be provided to the user. Meanwhile, the user's favorite background image may be stored in advance in the memory 22 to be displayed on the screen during the blank period when the channel is changed.

3 is a flowchart illustrating a method of outputting information when a channel is changed by a digital broadcast receiver according to an exemplary embodiment of the present invention.

When the channel is changed at the request of the user in step 2 (S2), in step 4 (S4), the MPEG2 decoder 14 starts to decode the changed channel broadcast input through the VSB demodulator 12. While decoding the changed channel broadcast in the MPEG2 decoder 14, in step 6, the CPU 20 checks whether data is being broadcast, and if the data is broadcast, proceeds to step 8 where data broadcast (such as commercial or emergency message broadcast) is displayed on the screen. Causes output On the other hand, if it is determined that the data is not broadcasted in step 6, the process proceeds to step 10 so that information on the changed program is output on the screen in the form of EPG using the PSIP information included in the broadcast program. On the other hand, the CPU 20 may cause the video signal previously stored in the memory 22 to be displayed on the screen while decoding the channel broadcast changed by the MPEG2 decoder 14. Subsequently, when decoding of the channel changed in the MPEG2 decoder 14 is finished in step 12 (S12), the broadcast for the channel is output on the screen. As such, the digital broadcasting receiver outputs information useful to the user such as commercial broadcasting, emergency message broadcasting, and EPG information through PSIP during a blank period during channel change.

As described above, according to the method for outputting information when changing a channel of the digital broadcasting receiver according to the present invention, the user can receive information such as commercial broadcasting, emergency message broadcasting, EPG information through PSIP, etc. Have useful information displayed on the screen. Accordingly, it is possible to provide the user with convenient information to the broadcast service company as well as ancillary benefits through advertisements.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (5)

In the information output method when changing the channel of the digital broadcast receiver, Determining whether the data broadcast signal is being received during the preparation period until one screen of the changed channel is output when the channel is changed, and if the data is being received, displaying the data broadcast on the screen. How to output information when changing channel. delete The method of claim 1, And the data broadcast is any one of an advertisement and an emergency message broadcast. In the information output method when changing the channel of the digital broadcast receiver, And when the channel is changed, causing the EPG to be displayed on the screen during the preparation period until one screen of the changed channel is outputted. delete

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