KR100826192B1 - apparatus for receiving broadcasting signal and method thereof - Google Patents

apparatus for receiving broadcasting signal and method thereof Download PDF

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Publication number
KR100826192B1
KR100826192B1 KR1020060059202A KR20060059202A KR100826192B1 KR 100826192 B1 KR100826192 B1 KR 100826192B1 KR 1020060059202 A KR1020060059202 A KR 1020060059202A KR 20060059202 A KR20060059202 A KR 20060059202A KR 100826192 B1 KR100826192 B1 KR 100826192B1
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South Korea
Prior art keywords
stream
content
decoding
broadcast signal
decoder
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KR1020060059202A
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Korean (ko)
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KR20080001087A (en
Inventor
오준환
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엘지전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/443OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4436Power management, e.g. shutting down unused components of the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2368Multiplexing of audio and video streams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/434Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4343Extraction or processing of packetized elementary streams [PES]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/438Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4382Demodulation or channel decoding, e.g. QPSK demodulation

Abstract

The present invention relates to a broadcast signal receiving apparatus and a broadcast signal receiving method. In accordance with one aspect of the present invention, there is provided a stream decoding unit for separating a transport stream of a received broadcast signal into a stream corresponding to each content and outputting the stream stream; A content decoding unit capable of decoding the streams according to the respective contents output by the stream decoding unit; A key input unit configured to receive a selection command of some of contents included in a broadcast signal from a user; And controlling the stream decoder to output only a stream of a part of the content for the plurality of contents received by the key input unit, according to the selection command received from the key input unit, and include in the selection command of the key input unit of the plurality of decoders. Provided is a broadcast signal receiving apparatus comprising a content selection unit for shutting off the power of the decoding unit for decoding the content that is not. According to the broadcast signal receiving apparatus and the broadcast signal receiving method according to the present invention, power consumption of the broadcast signal receiving apparatus can be reduced, and storage capacity can be saved.
Figure R1020060059202
Content, pid, object, stream, broadcast, power, power

Description

Apparatus for receiving broadcasting signal and method

1 is a block diagram illustrating an example of an apparatus for receiving broadcast signals in order to easily understand the present invention.

2 is a block diagram showing an embodiment of a broadcast signal receiving apparatus according to the present invention.

3 is a flowchart illustrating an embodiment of a broadcast signal receiving method according to the present invention.

<Description of the code of the main part of drawing>

10: broadcasting receiver 20: channel decoder

30: error correction 40: stream decoding unit

50: content decoding unit 51: first decoding unit

51a: Audio signal storing unit 51b: Audio decoding unit

55: second decoder 55a: video signal storage

55b: video decoder 60: sound output unit

65: display unit 70: content selection unit

75: key input unit

The present invention relates to a broadcast signal receiving apparatus and a broadcast signal receiving method. More particularly, the present invention relates to a broadcast signal receiving apparatus and a broadcast signal for preventing power consumption and saving storage space through selective content decoding from a broadcast signal. It relates to a receiving method.

Various portable digital multimedia broadcasting receivers such as vehicle terminals, mobile phones, and portable multimedia players (PMPs) have been developed. With the advent of such portable digital multimedia broadcasting receivers, broadcasts containing various contents can be watched on a high-definition screen while moving.

On the other hand, although the user may use the audio content while driving or moving, there may be a situation where it is inappropriate to watch the video content. Even in this case, since all multimedia contents such as video and audio of the broadcast signal receiving apparatus are output to the outside, power consumption is problematic.

The user could turn off the display device of the broadcast signal receiving device to prevent the image from being displayed. However, in this case, only the power consumption due to the display device can be cut off, but the video content is still decoded and output. There is a problem that consumption occurs.

That is, even if a user wants only some of video, audio, and data services included in multimedia content, the conventional broadcast signal receiving apparatus has a problem in that power consumption is increased by decoding signals for all services included in the broadcast signal. .

In addition, when decoding and storing all broadcast signals including various services not used by a user, there is a problem that the storage capacity of the broadcast signal receiving apparatus may be wasted.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a broadcast signal receiving apparatus and a broadcast signal receiving method that can reduce power consumption.

Another object of the present invention is to provide a broadcast signal receiving apparatus and a broadcast signal receiving method capable of reducing the storage capacity of a broadcast signal receiving apparatus and reducing power consumption by inputting and outputting data to and from the storage apparatus.

In order to achieve the above object, the present invention provides a stream decoding unit that separates a transport stream of a received broadcast signal into a stream corresponding to each content and outputs the stream; A content decoding unit capable of decoding the streams according to the respective contents output by the stream decoding unit; A key input unit configured to receive a selection command of some of contents included in a broadcast signal from a user; And controlling the stream decoder to output only a stream of a part of the content for the plurality of contents received by the key input unit, according to the selection command received from the key input unit, and include in the selection command of the key input unit of the plurality of decoders. Provided is a broadcast signal receiving apparatus comprising a content selection unit for shutting off the power of the decoding unit for decoding the content that is not.

The content decoder includes at least two decoders: a first decoder for decoding a stream for audio content, a second decoder for decoding a stream for video content, and a third decoder for decoding a stream for data content. can do.

The stream decoding unit may include a PID (packet identifier) filter for separating and outputting the stream according to the PID (packet identifier) of the received transport stream.

The content decoder may separate and output the stream according to the object of the received transport stream.

Receiving a transport stream multiplexed with a plurality of contents; Receiving a content selection command to control to decode only a part of a plurality of contents included in the received transport stream; Decoding only a stream for the selected content among the plurality of contents according to the received content selection command; And expressing only the decoded content.

The transport stream is preferably a stream in which at least two streams of a stream for video content, a stream for audio content, and a stream for data broadcast content are multiplexed.

The decoding of only the stream for the selected content may include: filtering only the received transport stream and outputting only a stream corresponding to a PID (packet identifier) of the selected content; And decoding the stream for the output content.

The decoding of only the stream for the selected content may include: filtering only the received transport stream and outputting only a stream for an object of the selected content; And decoding the stream for the output content.

Hereinafter, with reference to the accompanying drawings an embodiment of a broadcast signal receiving apparatus and a broadcast signal receiving method according to the present invention that can specifically realize the above object.

1 is a block diagram illustrating an example of an apparatus for receiving broadcast signals in order to easily understand the present invention. An example of a broadcast signal receiving apparatus includes a broadcast receiver 10, a channel decoder 20, an error correction unit 30, a stream decoder 40, a content decoder 50, a sound output unit 60 and a display. A portion 65 is included.

An operation of an example of a general broadcast signal receiving apparatus will be described with reference to FIG. 1.

The broadcast receiver 10 may receive a broadcast signal, select a signal included in a channel of a desired band, demodulate it, and output the demodulated signal.

The channel decoder 20 may obtain frame information of the multiplexed broadcast signal by decoding the multiplexed broadcast signal output from the broadcast receiver 10.

The error correction unit 30 may perform error correction such as Reed-Solomon on the signal decoded by the channel decoder 20.

The stream decoder 40 may decode the error corrected stream according to a packet identifier (PID). The stream decoder 40 may decode identifier information of an elementary stream of an object belonging to each program from a program association table (PAT) having a packet ID of 0x00.

Here, the object represents a unit of audio content, video content, and data content included in the broadcast signal.

The stream decoder 40 separates the multiplexed transport streams into streams according to audio content, video content, and data content, respectively, with reference to the PMT (program mapping table) for each program obtained from the PAT. Can be output.

In addition, the content decoding unit 50 may receive a stream that the stream decoding unit 40 separates and outputs for each content, and decode the content according to each service.

For example, the content decoding unit 50 may include a first decoding unit 51 for decoding audio content, a second decoding unit 55 for decoding video content, and a third decoding unit for decoding a data signal. .

The first decoding unit 51 may include an audio signal storage unit 51a for storing the audio content stream and an audio decoding unit 51b for decoding the audio content stream.

The second decoding unit 55 may include a video signal storage unit 55a for storing the video content stream and a video decoding unit 55b for decoding the video content stream.

Similarly, the third decoder (not shown) may include a data signal storage unit for storing the data content stream and a data decoder for decoding the data content stream.

The audio signal storage unit 51a stores an elementary stream for an audio service output by the stream decoding unit 40, and the audio decoding unit 51a stores the audio stored by the audio signal storage unit 51a. The elementary stream may be decoded.

The sound output unit 60 may output the audio signal decoded by the audio decoder 51a to an external device as an audible sound.

The video signal storage unit 55a and the video decoding unit 55b may respectively store and decode elementary streams for video services output by the stream decoding unit 40.

The display unit 65 may display a video signal output from the video decoder 55b.

The broadcast signal receiving apparatus outputs the received broadcast signal for the user to view, but cannot output only the service desired by the user.

2 is a block diagram showing an embodiment of a broadcast signal receiving apparatus according to the present invention. An embodiment of the apparatus for receiving broadcast signals according to the present invention includes a broadcast receiver 10, a channel decoder 20, an error correction unit 30, a stream decoder 40, a content decoder 50, and an audio output unit. 60, a display unit 65, a content selection unit 70, and a key input unit 75.

Although a user may receive various services from the apparatus for receiving broadcast signals, an operation of a preferred embodiment of the present invention, in which only some of the various services are provided, will be described with reference to FIG. 2.

When the user wants to receive only some of the various services transmitted to the broadcast signal through other activities such as driving, for example, only an audio service, the user controls the broadcast signal receiving apparatus to selectively decode the service through the key input unit 75. can do.

The key input unit 75 may receive a command for selecting only an audio service from a user and output the command to the content selection unit 70.

The content selection unit 70 may control to selectively decode the audio content, the video content, and the data described in the BIFS (binary format for scenes) from the transport stream received by the stream decoding unit 40.

Various contents included in a broadcast signal such as audio content and video content may be described in units of one object. The content selection unit 70 may allow the stream decoding unit 40 to selectively output only some of the contents transmitted from the unit of the object to each decoding unit.

Then, the content selection unit 70 may turn off the power of the decoding unit for the content not selected.

The stream decoder 40 receives a command for content selection from the content selection unit 70, and does not output content other than the content selected by the content selection unit 70 using the PID of the stream to the content decoding unit. You can prevent it. To this end, the stream decoding unit 40 may include a PID filter 45, and the PID filter 45 outputs or does not output the transport stream according to the PID of the content for each service type included in the transport stream. You may not.

For example, when the user transmits a command to express only the audio service through the key input unit 80, the content selecting unit 70 may control the stream decoding unit 40 to selectively output only the content stream related to the audio service. have.

The content selection unit 70 may cut off the power of the second decoding unit 55 and the third decoding unit 57 except for the first decoding unit 51 for audio decoding among the content decoding units 50. have.

The stream decoder 40 may output only a stream transmitted for audio content by using a PID among the transport streams received using the PID filter 45.

According to the above operation, the power consumption of the second decoder 55 of the video decoder, which consumes a lot of power, is cut off, thereby reducing power consumption.

An operation of an embodiment of the present invention is distinguished from an operation of decoding a video signal but turning off only the power of the display unit, or outputting an audio signal from a broadcast signal receiving apparatus, but sounding off by a mute function.

3 is a flowchart illustrating an embodiment of a broadcast signal receiving method according to the present invention. An embodiment of a broadcast signal reception method according to the present invention will be described with reference to FIG. 3.

The transport stream included in the broadcast signal and multiple contents are multiplexed is received (S110). The multiplexed transport stream may include at least two streams of a stream for video content, a stream for audio content, and a stream for data broadcast content.

In operation S120, a selection command for selecting only some of contents of a plurality of contents included in the transport stream received from the user is received.

According to the received content selection command, only the stream for the selected content among the plurality of contents is decoded, and the remaining contents are not decoded (S130).

Only the decoded content is expressed (S140), so that only the broadcast content selected by the user is expressed.

According to an embodiment of the present invention, by not decoding a stream signal for a service that is not desired by a user, power consumption may be reduced, and the stream may not be stored, thereby consuming no storage space.

It is easy for a person skilled in the art to change or modify the present invention from the present specification. Therefore, although an embodiment of the present invention has been described above clearly, various modifications thereof should be made without departing from the spirit and the scope of the present invention.

The effects of the broadcast signal receiving apparatus and the broadcast signal receiving method according to the present invention described above are as follows. According to the broadcast signal receiving apparatus and the broadcast signal receiving method according to the present invention, power consumption of the broadcast signal receiving apparatus can be reduced, and storage capacity can be saved.

Claims (8)

  1. A stream decoder for separating and outputting a transport stream of the received broadcast signal into a transport stream corresponding to each content;
    A content decoder for filtering a packet identifier (PID) of a transport stream of each content output by the stream decoder to separate and output the transport stream;
    A key input unit configured to receive a selection command of some of contents included in a broadcast signal from a user; And
    According to a selection command received from the key input unit, the stream decoder controls to output only a stream for a part of the content for the plurality of content streams received, and the key input unit of the plurality of decoders in the content decoder And a content selection unit for cutting off power of a decoding unit for decoding content not included in the selection command.
  2. The method of claim 1,
    The content decoder includes at least two decoders: a first decoder for decoding a stream for audio content, a second decoder for decoding a stream for video content, and a third decoder for decoding a stream for data content. Broadcast signal receiving apparatus, characterized in that.
  3. delete
  4. The method of claim 1,
    And the content decoding unit separates and outputs the stream according to the received object of the transport stream.
  5. A stream receiving step of receiving a transport stream multiplexed with a plurality of contents;
    A command receiving step of receiving a content selection command for controlling only the content of a part of the plurality of contents included in the received transport stream to be decoded;
    Filtering only the received transport stream according to the selection command and outputting only a stream for an object of the selected content;
    Decoding the stream for the output content; And
    And displaying only the decoded content.
  6. The method of claim 5,
    The transport stream is a broadcast signal receiving method, characterized in that at least two streams of a stream for video content, a stream for audio content and a stream for data broadcast content are multiplexed.
  7. The method of claim 5,
    Decoding only the stream for the selected content,
    Filtering only the received transport stream and outputting only a stream corresponding to a PID (packet identifier) of the selected content; And
    And decoding the stream for the output content.
  8. delete
KR1020060059202A 2006-06-29 2006-06-29 apparatus for receiving broadcasting signal and method thereof KR100826192B1 (en)

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KR101297168B1 (en) * 2008-03-10 2013-08-21 에스케이플래닛 주식회사 Method and Apparatus for decoding hierarchy by saving capacity

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11275488A (en) * 1998-03-24 1999-10-08 Sharp Corp Digital broadcast receiver
KR20020005970A (en) * 2000-07-10 2002-01-18 모리시타 요이찌 Apparatus and method of multiple decoding
JP2006014225A (en) * 2004-06-29 2006-01-12 Kyocera Corp Digital broadcast receiver
KR20070016410A (en) * 2005-08-03 2007-02-08 주식회사 대우일렉트로닉스 Digital multimedia broadcasting receiver and method for controlling at moving mode in the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11275488A (en) * 1998-03-24 1999-10-08 Sharp Corp Digital broadcast receiver
KR20020005970A (en) * 2000-07-10 2002-01-18 모리시타 요이찌 Apparatus and method of multiple decoding
JP2006014225A (en) * 2004-06-29 2006-01-12 Kyocera Corp Digital broadcast receiver
KR20070016410A (en) * 2005-08-03 2007-02-08 주식회사 대우일렉트로닉스 Digital multimedia broadcasting receiver and method for controlling at moving mode in the same

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