WO2013162304A1 - 비디오 데이터를 재생하는 방법 및 장치 - Google Patents
비디오 데이터를 재생하는 방법 및 장치 Download PDFInfo
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- WO2013162304A1 WO2013162304A1 PCT/KR2013/003569 KR2013003569W WO2013162304A1 WO 2013162304 A1 WO2013162304 A1 WO 2013162304A1 KR 2013003569 W KR2013003569 W KR 2013003569W WO 2013162304 A1 WO2013162304 A1 WO 2013162304A1
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- video data
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000002123 temporal effect Effects 0.000 claims abstract description 26
- 238000000605 extraction Methods 0.000 claims description 5
- 238000013075 data extraction Methods 0.000 claims 1
- 230000000875 corresponding effect Effects 0.000 description 10
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000284 extract Substances 0.000 description 3
- AWSBQWZZLBPUQH-UHFFFAOYSA-N mdat Chemical compound C1=C2CC(N)CCC2=CC2=C1OCO2 AWSBQWZZLBPUQH-UHFFFAOYSA-N 0.000 description 3
- 230000008520 organization Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Classifications
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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
- H04N5/91—Television signal processing therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234327—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into layers, e.g. base layer and one or more enhancement layers
-
- 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
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
- H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
-
- 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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4621—Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/85406—Content authoring involving a specific file format, e.g. MP4 format
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
Definitions
- the present invention relates to a method and apparatus for reproducing video data, and more particularly, to a method and apparatus for recording access position information for temporal hierarchical expansion of video data and using the position information to reproduce video data.
- the general media file format basically includes a header part and an image data part.
- the header portion describes the information of the media and the video data portion stores the compressed media data.
- the general media file format has defined ISOFF (ISO Base Media File Format), which can be commonly applied to various applications in the international standard organization MPEG.
- ISOFF ISO Base Media File Format
- the ISO Base Media File Format is designed so that data such as compressed media streams and configuration information related to the compressed media streams can be stored hierarchically in a plurality of container boxes.
- a picture for temporal layer access is defined as one of a network abstraction layer (NAL) unit type, and a network abstract layer header Include that information in the.
- NAL network abstraction layer
- a temporal layer ID indicating the layer information about the temporal layer is defined in a sample group description box. Through this time layer identification value, hierarchical information about a corresponding sample can be expressed.
- time layer access position information of a sample that is capable of temporal layer extension by only expressing layer information of a corresponding sample through a time layer identification value. This is because network abstraction layer header information corresponding to each sample needs to be analyzed to recognize time layer access location information.
- the problem to be solved by the present invention is to provide a storage file format based on the ISO Base Media File Format that can store the time layer access position information for the time-layer accessible samples for efficient time layer expansion.
- a method of reproducing video data when a video file is received, storing the received video file in a storage format, and a video data stream and video data attribute information encoded from the stored video file. Extracting a sample corresponding to an extended temporal layer from the extracted video data stream, based on the extracting of the extracted data and positional information of a time-layer accessible sample included in the video data property information; Restoring the reproduced samples.
- the apparatus for reproducing video data includes a receiving unit for receiving a video file, a storage unit for storing the received video file in a storage format, and a video data stream encoded from the stored video file.
- the extracted video data extracting unit, a video property extracting unit extracting video data property information from the stored video file, and location information of a time-layer accessible sample included in the video data property information; And a time layer extractor for extracting samples corresponding to the extended time layer from the video data stream, and a playback unit for reconstructing and reproducing the extracted samples.
- the present invention provides time hierarchical access position information for temporal hierarchical expansion through a box of a file format, so that the time hierarchical access position information is recognizable when reconstructing video data stored in a high efficiency video encoding file format.
- samples may be selectively extracted from a sample of a position at which time layer extension is possible, and delivered to a reconstructor.
- FIG. 1 is a block diagram showing a media data reproducing apparatus according to an embodiment of the present invention.
- FIG. 2 is a flowchart illustrating a media data playback process according to an embodiment of the present invention.
- 3 is a syntax illustrating position information of a sample having time hierarchy access according to an embodiment of the present invention.
- FIG. 4 is a diagram illustrating a box structure of an ISO Base Media File Format based video file stored including time layer access sample information according to an embodiment of the present invention.
- FIG. 5 illustrates a scene in which samples are selectively extracted according to an embodiment of the present invention.
- the file format includes hierarchical boxes defined in ISO Base Media File Format, and each box is configured in a form containing encoded media data and attribute information about the media data. .
- the embodiment of the present invention adds a box indicating a sample number corresponding to a temporal layer access picture to a file format in a high efficiency video encoding technique, so that position information capable of temporal layer expansion is provided through a file storage format.
- FIG. 1 is a block diagram illustrating a series of processes for receiving, storing, extracting, and restoring media data based on a high-efficiency video encoding compression technique according to an embodiment of the present invention.
- the receiver 110 receives the media data through network streaming and stores the media data in the storage 120 in the form of a storage format.
- the storage 120 stores media data composed of a basic box structure defined in the ISO Base Media File Format.
- the video file included in the media data stored in the storage 120 includes a video stream encoded by a high efficiency video encoding compression technique, and according to an embodiment of the present invention, a high efficiency video encoding file format based on an ISO Base Media File Format. Coding File Format).
- the video data extractor 130 extracts the encoded video data stream from the 'mdat' box of the video file stored in the storage 120 in the form of a high efficiency video encoding file format.
- the video property extractor 140 extracts video data property information from a 'moov' box of a video file stored in a high efficiency video encoding file format.
- the video data attribute information extracted from the moov box includes sample number information provided in a 'stbl (sample table)' box and time layer access position information of a sample capable of accessing a time layer according to an embodiment of the present invention.
- the temporal hierarchical extracting unit 150 is a video data extracting unit 130 based on sample number information capable of extracting the temporal hierarchies extracted from the video property extracting unit 140 at the time when temporal hierarchical expansion is required while playing a video file. Extract samples for the extended time layer from the extracted video stream.
- the time hierarchy access information that may be obtained in the video stream restoration process by the restoration unit 160 may be recognized before the restoration process. .
- Samples of the extended temporal layer extracted by the temporal layer extraction unit 150 are transferred to the decompression unit 160 and decompressed and then reproduced through the reproducing unit 170.
- FIG. 2 is a flowchart illustrating a series of processes for receiving, storing, extracting, and restoring media data based on a high efficiency video encoding compression technique according to an embodiment of the present invention.
- the received video file is stored in the storage in a storage format based on the ISO Base Media File Format in step 220.
- the video data stream is extracted from the mdat box of the encoded video file from the video file having the high efficiency video encoding file format.
- video data attribute information is extracted from a moov box of a video file having a high efficiency video encoding file format.
- the extracted video data attribute information according to an embodiment of the present invention includes time-layer access position information of a sample that allows time-layer access to a video file.
- step 250 based on the time-layer access position information of the time-layer accessible sample extracted in step 240, samples corresponding to the basic time layer and samples corresponding to the extended time layer are extracted after the sample.
- step 260 the extracted samples are restored and reproduced.
- FIG. 3 illustrates syntax of sample information included in a temporal layer access sample ('tlas') box providing time layer access location information of a sample having time layer access according to an embodiment of the present invention. will be.
- the tlas box according to an embodiment of the present invention is included in a sample table ('stbl') box based on an ISO Base Media File Format, and provides a sample number for accessing a time layer for temporal layer expansion in a video stream.
- the time layer access position information according to an embodiment of the present invention is 'entry_count' representing total number information of samples accessible in a time layer within a video stream, and a time layer according to the number of entry_counts. It includes a 'sample_number' indicating an accessible sample number.
- the receiver may recognize information about a sample number that can be extended in time hierarchy through a sample_number value, and start point of extraction of extended time hierarchy samples according to time hierarchy extension in a video file stored in a file format based on the recognized sample number. Sampling is possible.
- FIG. 4 is a diagram illustrating a box structure of an ISO Base Media File Format based video file stored including time layer access sample information according to an embodiment of the present invention.
- the box structure of a video file includes an ftyp box 410 indicating file type information, a moov box 420 containing video data attribute information, and encoded video data. It is configured to include an mdat box 430.
- the trak box 421 included in the box of moov 420 provides information for searching for a track representing a set of correlated samples among a presentation, which is one or more motion sequences that can be combined with audio. Include.
- the track header (tkhd) box 422 included in the trak box 421 includes all information about the current track.
- mdia box 423 contains declaration information for the media of the current track.
- the minf box 424 included in the mdia box 423 contains characteristic information about the media of the current track, and in the minf box 424 a stbl box containing indexing information about the time, data, and location of the samples in the track. 425 is included.
- the tlas box 426 according to an embodiment of the present invention is located in the stbl box 425 to provide indexing information for samples that are time-layer accessible.
- FIG. 5 illustrates a scene in which samples are selectively extracted through a sample number corresponding to a temporal layer access picture indicating a time layer access point according to an embodiment of the present invention.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Computer Security & Cryptography (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Signal Processing For Recording (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
Abstract
Description
Claims (10)
- 비디오 데이터를 재생하는 방법에 있어서,비디오 파일이 수신되면, 상기 수신된 비디오 파일을 저장 포맷으로 저장하는 과정과,상기 저장된 비디오 파일로부터 부호화된 비디오 데이터 스트림과 비디오 데이터 속성 정보를 추출하는 과정과,상기 비디오 데이터 속성 정보에 포함된 시간 계층 접근이 가능한 샘플의 위치 정보를 바탕으로, 상기 추출된 비디오 데이터 스트림으로부터 확장된 시간 계층에 해당하는 샘플들을 추출하는 과정과,상기 추출된 샘플들을 복원하여 재생하는 과정을 포함하는 비디오 데이터 재생 방법.
- 제1항에 있어서,상기 위치 정보는, 상기 비디오 데이터 스트림 내에서 시간 계층 접근이 가능한 샘플의 총 개수와, 상기 시간 계층 접근이 가능한 샘플들의 번호를 포함하는 비디오 데이터 재생 방법.
- 제1항에 있어서,상기 추출하는 과정은,상기 시간 계층 접근이 가능한 샘플 중 첫 번째 샘플부터 기본 시간 계층에 해당하는 샘플들과 상기 확장된 시간 계층에 해당하는 샘플들을 함께 추출하는 비디오 데이터 재생 방법.
- 제1항에 있어서,상기 저장 포맷은 ISOFF(ISO Base Media File Format)이며, 상기 위치 정보는 stbl 박스에 포함되는 비디오 데이터 재생 방법.
- 제4항에 있어서,상기 위치 정보는 상기 stbl 박스 내에 새로운 박스로 삽입되는 비디오 데이터 재생 방법.
- 비디오 데이터를 재생하는 장치에 있어서,비디오 파일을 수신하는 수신부와,상기 수신된 비디오 파일을 저장 포맷으로 저장하는 저장부와,상기 저장된 비디오 파일로부터 부호화된 비디오 데이터 스트림을 추출하는 비디오 데이터 추출부와,상기 저장된 비디오 파일로부터 비디오 데이터 속성 정보를 추출하는 비디오 속성 추출부와,상기 비디오 데이터 속성 정보에 포함된 시간 계층 접근이 가능한 샘플의 위치 정보를 바탕으로, 상기 추출된 비디오 데이터 스트림으로부터 확장된 시간 계층에 해당하는 샘플들을 추출하는 시간 계층 추출부와,상기 추출된 샘플들을 복원하여 재생하는 재생부를 포함하는 비디오 데이터 재생 장치.
- 제6항에 있어서,상기 위치 정보는, 상기 비디오 데이터 스트림 내에서 시간 계층 접근이 가능한 샘플의 총 개수와, 상기 시간 계층 접근이 가능한 샘플들의 번호를 포함하는 비디오 데이터 재생 장치.
- 제6항에 있어서,상기 시간 계층 추출부는,상기 시간 계층 접근이 가능한 샘플 중 첫 번째 샘플부터 기본 시간 계층에 해당하는 샘플들과 상기 확장된 시간 계층에 해당하는 샘플들을 함께 추출하는 비디오 데이터 재생 장치.
- 제6항에 있어서,상기 저장 포맷은 ISOFF(ISO Base Media File Format)이며, 상기 위치 정보는 stbl 박스에 포함되는 비디오 데이터 재생 장치.
- 제9항에 있어서,상기 위치 정보는 상기 stbl 박스 내에 새로운 박스로 삽입되는 비디오 데이터 재생 장치.
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US14/397,358 US10158888B2 (en) | 2012-04-25 | 2013-04-25 | Method and apparatus for reproducing video data |
CN201380033339.5A CN104380718B (zh) | 2012-04-25 | 2013-04-25 | 再现视频数据的方法和装置 |
EP13782581.6A EP2843940A4 (en) | 2012-04-25 | 2013-04-25 | METHOD AND DEVICE FOR PLAYING VIDEO DATA |
JP2015508869A JP6440034B2 (ja) | 2012-04-25 | 2013-04-25 | ビデオデータを再生する方法及び装置 |
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2012
- 2012-04-25 KR KR1020120043182A patent/KR101995270B1/ko active IP Right Grant
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2013
- 2013-04-25 CN CN201380033339.5A patent/CN104380718B/zh active Active
- 2013-04-25 US US14/397,358 patent/US10158888B2/en active Active
- 2013-04-25 WO PCT/KR2013/003569 patent/WO2013162304A1/ko active Application Filing
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KR20100030648A (ko) * | 2007-06-26 | 2010-03-18 | 노키아 코포레이션 | 시간 레이어 스위칭 포인트들을 표시하는 시스템 및 방법 |
JP2011528868A (ja) * | 2008-07-16 | 2011-11-24 | ノキア コーポレイション | トラックおよびトラックサブセットグループ化の方法および装置 |
KR20120033289A (ko) * | 2010-09-29 | 2012-04-06 | 한국전자통신연구원 | 필터 정보 예측을 이용한 영상 부호화/복호화 방법 및 장치 |
US20120082237A1 (en) * | 2010-10-04 | 2012-04-05 | Wonkap Jang | Automatic Temporal Layer Bit Allocation |
KR20120038367A (ko) * | 2010-10-06 | 2012-04-23 | 한국전자통신연구원 | 스트리밍 컨텐츠 제공 장치 및 방법 |
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Publication number | Publication date |
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JP6440034B2 (ja) | 2018-12-19 |
EP2843940A1 (en) | 2015-03-04 |
EP2843940A4 (en) | 2015-10-14 |
CN104380718B (zh) | 2017-10-27 |
KR20130120147A (ko) | 2013-11-04 |
KR101995270B1 (ko) | 2019-07-03 |
US20150085940A1 (en) | 2015-03-26 |
US10158888B2 (en) | 2018-12-18 |
CN104380718A (zh) | 2015-02-25 |
JP2015520553A (ja) | 2015-07-16 |
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