KR100190606B1 - Satellite broadcast receiving device - Google Patents
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- KR100190606B1 KR100190606B1 KR1019960018175A KR19960018175A KR100190606B1 KR 100190606 B1 KR100190606 B1 KR 100190606B1 KR 1019960018175 A KR1019960018175 A KR 1019960018175A KR 19960018175 A KR19960018175 A KR 19960018175A KR 100190606 B1 KR100190606 B1 KR 100190606B1
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- 238000010586 diagram Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
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- 230000002708 enhancing effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/71—Wireless systems
- H04H20/74—Wireless systems of satellite networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling 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
- H04N21/4341—Demultiplexing of audio and video streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
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- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Theoretical Computer Science (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Signal Processing For Recording (AREA)
- Television Systems (AREA)
Abstract
본 발명은 시청자가 특정영상을 느린속도로 재생시켜 볼 수 있도록 하는 슬로모션을 지원하는 디지탈위성영상수신기에 관한 것으로, 방송위성으로부터 송출된 아날로그 방송신호를 수신하여 복조 및 에러수정을 행하여 MPEGⅡ방식의 패킷단위로 데이타열을 출력하는 채널부와, 상기 채널부로부터 입력되는 데이타열을 비디오데이타와 오디오데이타로 분리하는 디멀티플렉서와, 정상속도재생시에는 상기 디멀티플렉서로부터 출력되는 데이타를 메모리에 인가하면서, 그 비디오데이타와 오디오데이타를 각각 MPEG방식으로 디코딩하여 디컴프레싱하고, 느린속도재생시에는 메모리에 저장된 비디오데이타를 읽어들여 소정의 느린속도로 디컴프레싱하는 MPEG디코더와, 상기 디멀티플렉서로부터 출력되는 비디오데이타열을 순차저장하는 메모리와, 상기 MPEG디코더로부터 출력되는 비디오데이타를 NTSC 또는 PAL 방식의 비디오신호로 변환하는 비디오엔코더와, 상기 MPEG디코더로부터 출력되는 오디오데이타를 아날로그 신호로 변환하는 오디오디지탈/아날로그변환기를 구비한다.[0001] The present invention relates to a digital satellite image receiver supporting slow motion in which a viewer can reproduce a specific image at a slow speed, and is capable of receiving an analog broadcast signal transmitted from a broadcasting satellite, demodulating and error- A demultiplexer for separating a data stream input from the channel unit into video data and audio data; and a demultiplexer for applying data output from the demultiplexer to the memory during normal speed reproduction, An MPEG decoder for decoding video data and audio data respectively by an MPEG system and decoding the video data and decoding video data stored in the memory at a slow rate and decoding the video data at a predetermined slow rate; , And a memory A video encoder for converting video data output from the EG decoder into an NTSC or PAL video signal, and an audio digital / analog converter for converting audio data output from the MPEG decoder into an analog signal.
Description
제1도는 본 발명에 의한 슬로모션을 지원하는 디지탈위성영상수신기의 구성을 보여 주는 블럭도이다.FIG. 1 is a block diagram illustrating a configuration of a digital satellite image receiver supporting slow motion according to the present invention.
제2도는 MPEGⅡ방식으로 패킷화된 화면그룹(GOP)의 영상배치순서를 보여주는 도면이다.FIG. 2 is a view showing a video arrangement order of a group of picture groups (GOP) packetized in the MPEG II format.
* 도면의 주요부분에 대한 부호의 설명DESCRIPTION OF THE REFERENCE NUMERALS
10 : 채널부 20 : 디멀티플렉서10: channel section 20: demultiplexer
30 : MPEG디코더 40 : 메모리(DRAM)30: MPEG decoder 40: Memory (DRAM)
50 : 비디오엔코더 60 : 오디오디지탈아날로그변환기50: video encoder 60: audio digital-to-analog converter
70 : TV70: TV
본 발명은 디지탈위성영상수신기(DSVR : Digital Satellite Video Receiver)에 관한 것으로, 특히 시청자가 특정영상을 느린속도로 재생시켜 볼 수 있도록 하는 슬로모션을 지원하는 디지탈위성영상수신기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital satellite image receiver (DSVR), and more particularly, to a digital satellite image receiver supporting slow motion in which a viewer can reproduce a specific image at a slow speed.
일반적으로, VTR, VCR등과 영상재생장치들은 되감기 기능이나 화면정지 기능이 있어, 특정화면을 다시보고자 하는 경우, 되감기 기능을 이용, 테이프를 되감아서, 다시볼 수 있으며, 또한 특정화면을 정지시켜 화면을 자세히 볼 수 있도록 되어 있다.In general, VTRs, VCRs, and video playback devices have a rewinding function and a screen stop function. When a user wants to view a specific screen again, the user can rewind the tape using the rewind function, You can see the screen in detail.
그런데, 일반적인 텔레비젼에는 상기와 같은 되감기기능, 화면정지 기능등이 없어 방송시청도중 특정부분을 다시 또는 느리게 보고자 하여도 그럴 수가 없는 불편한 점이 있었다.However, in general TVs, there is no rewinding function, a screen stop function, and the like, and it is inconvenient to watch a certain portion again or slowly during watching the broadcast.
또한, 종래의 위성방송수신기는 위성으로부터 송출된 위성방송신호를 순차적으로 수신하여 소정의 처리(복조, 에러정정, 디코딩)한 후, TV입력신호로 변환하여 출력하도록 되어, 시청자가 프로그램의 특정부분을 자세하게 또는 느리게 다시 보고자 하는 경우, 이를 지원해 주는 기능이 구비되어 있지 않아 불편한 점이 있었다.In addition, the conventional satellite broadcast receiver sequentially receives satellite broadcast signals transmitted from satellites, performs predetermined processing (demodulation, error correction, and decoding), and converts the satellite broadcast signals into TV input signals, There is a disadvantage in that it is not provided with a function to support it.
본 발명은 상기와 같은 문제점을 해결하기 위한 것으로, 그 목적은 디지탈위성방송기에 느린 속도로 화면을 재생하도록 하는 기능을 구비시킴으로써, 시청자가 방송 시청도중 특정화면을 자세하게 다시 볼 수 있도록 하는 슬로모션을 지원하는 디지탈 위성영상 수신기를 제공함에 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a digital satellite broadcasting apparatus capable of playing back a screen at a slow speed, And a digital satellite image receiver.
상기와 같은 목적을 달성하기 위한 기술적인 수단으로써, 본 발명은 위성방송신호를 수신하는 디지탈 위성 영상수신기에 있어서,Technical Solution In order to accomplish the above object, the present invention provides a digital satellite image receiver for receiving a satellite broadcast signal,
방송위성으로부터 송출된 아날로그 방송신호를 수신하여 복조 및 에러수정을 행하여 MPEGⅡ방식의 패킷단위로 데이타열을 출력하는 채널부와,A channel unit for receiving an analog broadcasting signal transmitted from a broadcasting satellite, demodulating and error-correcting the analog broadcasting signal,
상기 채널부로부터 입력되는 데이타열을 비디오데이타와 오디오데이타로 분리하는 디멀티플렉서와,A demultiplexer for separating a data string input from the channel unit into video data and audio data;
정상속도재생시에는 상기 디멀티플렉서로부터 출력되는 데이타를 메모리에 인가하면서, 그 비디오데이타와 오디오데이타를 각각 MPEG방식으로 디코딩하여 디컴프레싱하고, 느린속도재생시에는 메모리에 저장된 비디오데이타를 읽어들여 소정의 느린속도로 디컴프레싱하는 MPEG디코더와,During normal speed reproduction, data outputted from the demultiplexer is applied to a memory, and the video data and audio data are respectively decoded by the MPEG system and decoded, and at the time of slow speed reproduction, video data stored in the memory is read, An MPEG decoder for decoding,
상기 디멀티플렉서로부터 출력되는 비디오데이타열을 순차저장하는 메모리와,A memory for sequentially storing video data strings output from the demultiplexer,
상기 MPEG 디코더로부터 출력되는 비디오데이타를 NTSC 또는 PAL 방식의 비디오신호로 변환하는 비디오엔코더와,A video encoder for converting the video data output from the MPEG decoder into an NTSC or PAL video signal,
상기 MPEG디코더로부터 출력되는 오디오데이타를 아날로그신호로 변환하는 오디오 디지탈/아날로그변환기를 구비함을특징으로 한다.And an audio digital / analog converter for converting the audio data output from the MPEG decoder into an analog signal.
이하 첨부한 도면을 참조하여 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings.
제1도는 본 발명에 의한 디지탈위성영상수신기의 구성을 보여주는 블럭도로써, 내부에 튜너, QPSK복조기, FEC(도시생략)가 구비되어 위성으로부터 송출된 방송신호를 수신하고, 수신된 방송신호를 위상복조(QPSK)복조한 후, FEC로 전송도중 삽입되었을 오류를 수정하여, MPEG Ⅱ방식이 패킷단위로 데이타열(STREAM)을 출력하는 채널부(10)와, 상기 채널부(10)로부터 입력되는 데이타열을 비디오데이타와 오디오데이타로 분리하는 디멀티플렉서(20)와, 정상재생시 상기 디멀티플렉서(20)로부터 출력되는 데이타를 메모리(40)로 출력하며, 그 오디오데이타와, 비디오데이타를 각각 MPEG Ⅱ에 의하여 디코딩하고, 느린속도재생시에는 메모리(40)에 저장된 데이타열을 MPEGⅡ에 의하여 소정의 느린속도로 디코딩하여 압축상태를 푸는 MPEG디코더(30)와, 상기 MPEG디코더(30)를 통해 입력되는 디멀티플렉서(20)에서 출력된 비디오데이타열을 저장하는 메모리(40)와, 상기 MPEG디코더(30)로부터 출력되는 디컴플레싱된 비디오데이타를 NTSC 또는 PAL등의 TV방송신호로 변환되는 비디오엔코더(50)와, 상기 MPEG디코더(30)로부터 출력되는 디컴플레싱된 오디오데이타를 아날로그신호로 변환하는 오디오디지탈/아날로그변환기(60)와 상기 비디오엔코더(50)와 오디어 디지탈/아날로그변환기(60)로부터 비디오신호와 오디오신호를 입력받는 TV(70)를 구비한다.FIG. 1 is a block diagram showing a configuration of a digital satellite image receiver according to the present invention. A tuner, a QPSK demodulator, and an FEC (not shown) are provided therein to receive a broadcast signal transmitted from a satellite, A channel unit 10 for correcting an error that has been inserted during transmission in the FEC after demodulating (QPSK) demodulation and outputting a data stream STREAM in units of packets by the MPEG II system, A demultiplexer 20 for separating the data string into video data and audio data and a demultiplexer 20 for outputting the data outputted from the demultiplexer 20 in the normal reproduction to the memory 40. The audio data and the video data are converted into MPEG II An MPEG decoder 30 for decoding the data stream stored in the memory 40 at a slow rate by MPEG II and decoding the compressed data stream at the slow speed reproduction, A memory 40 for storing a video data sequence output from the demultiplexer 20 to be input to the demultiplexer 20, and a demultiplexer for demultiplexing the demultiplexed video data output from the MPEG decoder 30 into a video signal converted into a TV broadcast signal such as NTSC or PAL An audio digital-to-analog converter 60 for converting the decoded audio data output from the MPEG decoder 30 into an analog signal and a video encoder 50 and an audio digital-to-analog converter And a TV 70 for receiving a video signal and an audio signal from the TV 60.
상기에서, 메모리(40)는 저장 및 삭제가 가능하며, 16Mbyte 용량의 DRAM으로 구성한다.In the above, the memory 40 can be stored and deleted, and is configured with a DRAM having a capacity of 16 Mbytes.
상기 구성에 의한 본 발명의 작용 및 효과를 상세하게 설명하면 다음과 같다.Hereinafter, the operation and effect of the present invention will be described in detail.
위성으로부터 송출된 방송신호는 채널부(10)에 구비된 튜너(도시생략)로 수신되고, QPSK복조기(도시생략)로 입력되어 위상복조된 후 에러수정을 거쳐, MPEGⅡ에 의한 패킷단위로 출력된다. 상기 채널부(10)로부터 출력된 데이타열을 디멀티플렉서(20)에 입력되어 오디오데이타와 비디오데이타로 분리된다. 상기 분리된 오디오데이타와 비디오데이타로 분리된다. 상기 분리된 오디오데이타와 비디오데이타는 각각 MPEG디코터(30)로 입력되는데, 여기에서 MPEG디코더(30)는 입력된 비디오데이타를 메모리(40)로 출력하면서, 상기 비디오데이타와 오디오데이타를 각각 MPEGⅡ에 의하여 디코딩한다.The broadcast signal transmitted from the satellite is received by a tuner (not shown) provided in the channel unit 10, input to a QPSK demodulator (not shown), phase demodulated, error corrected, and output in packet units according to MPEG II . The data string output from the channel unit 10 is input to the demultiplexer 20 and separated into audio data and video data. And separated into the separated audio data and video data. The separated audio data and video data are input to the MPEG decoder 30 where the MPEG decoder 30 outputs the input video data to the memory 40 and converts the video data and audio data into MPEG2 Respectively.
이 MPEGⅡ에 의한 화면데이타의 구성을 설명하면, 우선, 비디오데이타는 다수의 화면을 그룹화한 화면그룹(GOP : GROUP OF PICTURE)으로 이루어지면, 상기 화면그룹은 약 15개의 화면데이타를 저장하는데, 15화면을 나타내기 위하여, 임의의 한 화면의 전체영상데이타를 부화화하여된 하나의 I화면과, 상기 I화면을 바탕으로 순방향으로 나타나는 화면을 예측할 수 있는 4개의 P(순방향예측화면)화면과, 상기 I화면과 P화면을 바탕으로 양방향으로 예측될 수 있는 10개의 B(양방향예측화면)으로 이루어지는데, 그 15화면의 배열순서를 제3도에 보였다. 그리고, 1초동안의 출력화면에 2개의 GOP이 포함되어, 1초동안 총 30프레임이 화면출력된다. 그러므로, 메모리(40)는 약 1초간의 화면(총 30프레임)을 저장한다.First, when video data is composed of a group of pictures (GOPs) in which a plurality of pictures are grouped, the picture group stores about 15 picture data, and 15 Four P (forward prediction picture) pictures for predicting a picture displayed in a forward direction based on the I picture and an I picture obtained by hatching the entire picture data of an arbitrary one picture in order to display a picture, 10 B (bidirectional predictive picture) that can be predicted in both directions based on the I picture and the P picture. The sequence of the 15 pictures is shown in FIG. In addition, two GOPs are included in the output screen for one second, and a total of 30 frames are displayed on the screen for one second. Therefore, the memory 40 stores a screen of about one second (a total of 30 frames).
상기에 근거하여, MPEG디코더(30)는 먼저 I화면을 복호화한 후, 다음 상기 I화면을 바탕으로 예측할 수 있는 P화면을 복호화하고, 그 다음 I화면과 P화면사이에 위치한 B화면을 순서대로 양방향예측하여 복호화한다.On the basis of the above, the MPEG decoder 30 first decodes the I picture, decodes the P picture that can be predicted based on the next I picture, and then sequentially places the B picture located between the I picture and the P picture Bi-directional prediction and decoding.
그리고, 느린속도로 재생시에는, MPEG디코더(30)는 상기 디멀티플렉서(20)로 부터의 입력데이타를 차단시키고, 메모리(40)에 저장된 제3도와 같은 비디오데이타를 읽어들여, 상기 읽어들인 비디오데이타를 복호화하여 소정의 시간간격(정상속도보다 느리게)을 두고 출력한다.At the slow speed reproduction, the MPEG decoder 30 blocks input data from the demultiplexer 20, reads the video data of the third aspect stored in the memory 40, and outputs the read video data Decoded and outputted at a predetermined time interval (slower than the normal speed).
상기와 같이, MPEG디코더(30)에 의하여 복호화되어 출력되는 비디오데이타는 비디오엔코더(50)로 입력되어 NTSC 또는 PAL방식 신호로 변환되어 TV(70)로 출력되고, MPEG디코더(30)에 의해 디코딩(복호화)된 오디오데이타는 오디오디지탈/아날로그변환기(60)에 의해 TV방송신호와 같은 아날로그신호로 변환된 후 TV(70)로 출력된다.As described above, the video data decoded and output by the MPEG decoder 30 is input to the video encoder 50, converted to an NTSC or PAL system signal and output to the TV 70, and decoded by the MPEG decoder 30 (Decoded) audio data is converted into an analog signal such as a TV broadcast signal by an audio digital-to-analog converter 60, and then output to the TV 70. [
이에 의하여, 본 발명은 시청자가 영상재생의 슬로모션을 요구시에, 메모리에 저장된 데이타를 소정시간격(정상속도보다 느리게)으로 복호하하여 출력하게 함으로써, 시청자의 요구에 맞춰 화면의 슬로모션재생해주어 시청자 서비스의 질을 높여, 편의를 도모하는 우수한 효과가 있는 것이다.Thus, according to the present invention, when the viewer requests the slow motion of the image reproduction, the data stored in the memory is decoded at a predetermined time interval (slower than the normal speed) and outputted so that the slow motion playback Thereby enhancing the quality of the viewer service and providing convenience.
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| KR1019960018175A KR100190606B1 (en) | 1996-05-28 | 1996-05-28 | Satellite broadcast receiving device |
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| KR1019960018175A KR100190606B1 (en) | 1996-05-28 | 1996-05-28 | Satellite broadcast receiving device |
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