1 svc (scalable video coding) & jsvm (joint scalable video model) kyumin jeong...

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SVCSVC(Scalable Video Coding)(Scalable Video Coding)&&

JSVMJSVM(Joint Scalable Video Model)(Joint Scalable Video Model)

Kyumin [email protected]

Computer Communications Lab.

October 1, 2007

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What is SVC?What is SVC?

Scalable Video Coding (SVC)

Project of the Joint Video Team (JVT) ISO/IEC Moving Pictures Experts Group (MPEG) ITU-T Video Coding Experts Group (VCEG)

As an amendment of the H.264/MPEG-4 AVC standard

One coding for multiple usage Universal Multimedia Access paradigm

하나의 비디오 스트림으로 다양한 전송 네트워크와 다양한 수신 단말에 적응적 서비스가 가능한 비디오 부호화 방법

One source, use Anytime, Anywhere, Anydevice

What is SVC?What is SVC?

Scalable Video Coding (SVC)

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ScalabilityScalability

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JSVMJSVM

JSVM (Joint Scalable Video Model) software Reference software for the Scalable Video Coding (SVC)

project Written in C++ Provided as source code Can be obtained via a CVS server

Preparations for using JSVM ( 윈도우 환경 ) Python

WinCVS 를 사용하기 위해서 필요함 , tcl/tk 는 Python 에 포함 http://www.python.org/

WinCVS http://www.wincvs.org

WinCVS 실행시 발생하는 문제 해결 ( 아래 링크 ) WinCvs could not find Python 2.1 installed

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Accessing the latest JSVM SoftwareAccessing the latest JSVM Software

CVS (Concurrent Versions System) 최신 JSVM 소프트웨어를 사용하기 위해 필요

SVC 프로젝트 진행중 => JSVM 업데이트

CVS 서버 접속을 위한 세팅

authentication

pserver

host address garcon.ient.rwth-aachen.de

path /cvs/jvt

user name jvtuser

password jvt.Amd.2

module name jsvm or jsvm_red

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Accessing the latest JSVM SoftwareAccessing the latest JSVM Software

Using a command line CVS client Admin - Command Line 선택 후 , 아래 명령어를 차례대로

입력1. cvs –d :pserver:jvtuser:[email protected]

aachen.de:/cvs/jvt login2. cvs –d

:pserver:[email protected]:/cvs/jvt checkout jsvm

실행 후 결과 : C:\JSVM 생성

Folder Contentbin location of binaries after building the software

lib location of libraries after building the software

JSVM source code and project files for the JSVM software

JSVM/H264Extension/build

workspaces and makesfiles

JSVM/H264Extension/data

basic examples of encoder configuration files

JSVM/H264Extension/include

includes files that are required by other libraries inside the JSVM project

JSVM/H264Extension/src include and source files for all libraries and test projects

JSVM0-config-samples usage examples

MVC-Configs configuration examples for Multiple View Coding

Validation validation scripts for checking the JSVM software

C:\jsvm\ Software Manual.doc < 사용법 등 참고 >

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Structure of the CVS repository for the JSVM Structure of the CVS repository for the JSVM SoftwareSoftware

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Building the JSVM softwareBuilding the JSVM software

Windows32 platform with Microsoft Visual Studio

C:\jsvm\JSVM\H264Extension\build\windows Microsoft Visual Studio .NET 2003 (VC7) workspace

- H264AVCVideoEncDec.sln Microsoft Visual Studio .NET 2005 and 2006 (VC8)

- H264AVCVideoEncDec_vc8.sln Microsoft Visual Studio 6 workspace

- H264AVCVideoEncDec.dsw

Build all project files by selecting Build→Batch Build

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Building the JSVM softwareBuilding the JSVM software

Result The versions with a “d” before the dot

Debug mode Without a “d” before the dot

Release mode

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Information on binaries and librariesInformation on binaries and libraries

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Usage and Configuration Usage and Configuration of the JSVM Software of the JSVM Software

테스트 파일테스트 파일

URL ftp://ftp.tnt.uni-hannover.de/pub/svc/testsequences/

Contents 내용 City, Crew, Football, Foreman, Bus, Ice, Harbour, Mobile,

Soccer

Contents 종류 4CIF, CIF, QCIF 에 대해 60, 30, 15, 7.5 Frame/Sec

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테스트 인코딩 및 디코딩테스트 인코딩 및 디코딩

테스트 과정1. JSVM SW 및 Test Contents 구하기2. Build a JSVM S/W3. Manual 참조하여 Configure file 을 수정

이 때 가급적 test directory 를 만들어 이 곳에 executables, test contents, cfg 파일들을 모아놓고 처리하는 것이 편함 ( 단 , versioning 에 주의 )

4. DownConvertStatic.exe 수행 필요한 경우 Test Contents 의 변형을 위해 down convert 시킴

5. H264AVCEncoderLibTestStatic.exe 수행 Multi-Layer encoding 인 경우 (e.g) test.264 파일생성 됨

6. BitStreamExtractorStatic.exe 수행 원하는 layer 의 bitstream 을 추출

7. H264AVCDecoderLibTestStatic.exe 수행 각 layer 별 인코딩 된 미디어 데이터를 decoding 하여 YUV 포맷 화

8. PSNRStatic.exe PSNR 측정

Resampler – DownConvertStatic.exeResampler – DownConvertStatic.exe

Spatial/temporal resampling

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DownConvertStatic <win> <hin> <in> <wout> <hout> <out> [<method> [<t> [<skip> [<frms> ]]]] [[-crop <args>] [-phase <args>]]

#Down-sampling a 4CIF 60Hz sequence to a QCIF 15Hz sequence using the dyadic methodDownConvertStatic 704 576 4CIF60.yuv 176 144 QCIF15.yuv 1 2

#Resampling of a CIF 30Hz sequence to a 528x432 15Hz sequence using the normative upsampler.DownConvertStatic 352 288 CIF30.yuv 528 432 528x432_15.yuv 0 1

method : rescaling methods (default: 0) 0: normative upsampling non-normative downsampling (JVT-R006) 1: dyadic upsampling (AVC 6-tap (1/2 pel) on odd luma samples dyadic downsampling (MPEG-4 downsampling filter)

2: crop only 3: upsampling (Three-lobed Lanczos-windowed sinc) 4: upsampling (JVT-O041: AVC 6-tap (1/2 pel) + bilinear 1/4 pel)


Cropping window Generating the output sequence as a cropped area of the

input Cropping parameters

crop_type- 0 : for the entire sequence- 1 : for each picture of the sequence

crop_file- Filename of the file containing the cropping parameters

-crop crop_type crop_file

<x_orig> <y_orig> <crop_width> <crop_height> // parameters for frame 0<x_orig> <y_orig> <crop_width> <crop_height> // parameters for frame 1<x_orig> <y_orig> <crop_width> <crop_height> // parameters for frame 2<x_orig> <y_orig> <crop_width> <crop_height> // parameters for frame 3...

DownConvertStatic.exe 1280 720 720p50.yuv 720 576 SD25.yuv 0 –crop 0 crop.txt 1

content of crop.txt:190 0 900 720


Chroma phase shift management -phase option

in_uv_ph_x, in_uv_ph_y, out_uv_ph_x and out_uv_ph_y The horizontal and vertical phase shift, the chroma

components in comparison to the luma component Input : Luma samples for the input sequence Output : Chroma phase shift of the output sequence

Value range of -1 to 1

Resampling mode -resample_mode option Allow the resampling of both progressive or interlace

material Value range of 0 to 5

Encoder - Encoder - H264AVCEncoderLibTestStaticH264AVCEncoderLibTestStatic

Generating AVC or SVC bit-streams

Using the encoder No guarantee rate-distortion efficient coding

- For obtaining optimized encoding results, the encoder configuration has to be carefully specified

Not provide a rate-control- The bit-rate needs to be controlled by selecting appropriate

quantization parameters

Single-layer coding mode and Scalable coding mode Single-layer bit-stream can also be generated in the scalable

coding mode Encoding mode is specified by the parameter AVCMode

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H264AVCEncoderLibTestStatic.exe –pf <mcfg> [command line options]


Single-layer coding mode AVCMode = 1 AVC compatible bit-stream is generated Encoder configuration file in single-layer coding mode

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Command line options

Scalable coding mode AVCMode = 1 One or more layer configuration files have to be specified

inside the main configuration files

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-bf (bitstream)The parameter bitstream specifies the filename for the bit-stream to be generated.

-frms (frames)The parameter frames specifies the number of frames of the input sequence to be

encoded.-pf (config)

The parameter config specifies the name of the config file to be used.-h

Prints out a brief help on using the encoder.

C:\jsvm\JSVM0-config-samples\Contrib-examples\JVT-O018\Munich-Test-Points\cfg_ags

Other JSVM SoftwaresOther JSVM Softwares

Decoder - H264AVCDecoderLibTestStatic.exe

SVC to AVC Bit-stream Rewriter - AvcRewriterStatic.exe Converts an SVC bitstream to an AVC bitsream

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H264AVCDecoderLibTestStatic <str> <rec> [-ec <ec>] [<maxPOCDiff>]

str: bit-stream file (input) rec: reconstructed video sequence (output) ec: error concealment method (1-3), 0 means no error concealment maxPocDiff: maximum difference of POC values of successive output frames

AvcRewriterStatic <svcstr> <avcstr>

svcstr: bit-stream file (input) avcstr: rewritten avc bit-stream file (output)


Bit-stream extractor - BitStreamExtractorStatic.exe Extract sub-streams of an AVC or SVC stream

Streams with a reduced spatial and/or temporal resolution and/or a reduced bit-rate

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BitStreamExtractorStatic [-pt trace] <in> [<out> [[-e] [-ql | -qlord]] | [-sl] | [[-l] [-t] [-f]] | [-b] | [-et] ]

Extraction of a scalable sub-stream using the general option –eBitStreamExtractorStatic input.svc output.svc –e 176x144@15:600

Extraction of a scalable layerBitStreamExtractorStatic input.svc output.svc –sl 7


Quality level assigner – QualityLevelAssignerStatic.exe Embed information about quality layers inside a bit-

stream Quality layer information can be employed by the extraction

process - To optimize the rate-distortion efficiency of the extracted sub-

stream

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QualityLevelAssignerStatic -in Input -org L Original [-org L Original] [-out Output [-sei] | -wp DatFile] [-dep | -ind] [-mlql]orQualityLevelAssignerStatic -in Input -out Output -rp DatFile [-sei]

-in Input - input bit-stream -out Output - output bit-stream with determined quality layer id's -org L Original - original image sequence for layer L -wp DatFile - data file for storing rate and distortion values -rp DatFile - data file with previously computed rate and distortion values -sei - provide quality layer info using SEI mesages -dep - determine only dependent distortions (speed-up by factor of 2, slight coding eff. losses) -ind - determine only independent distortions (speed-up by factor of 2, slight coding eff. losses) -mlql - determine Multi Layer Quality Layer Ids


MCTF pre-processing tool – MCTFPreProcessorStatic.exe Pre-filtering image sequences

PSNR tool – PSNRStatic.exe Measuring the Peak-Signal-To-Noise-Ratio (PSNR)

between two sequences Calculating the bit-rate

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MCTFPreProcessor -w Width -h Height -f frms -i Input -o Output [-gop GOPSize] [-qp QP]

-w Width - frame width in luma samples (multiple of 16) -h Height - frame height in luma samples (multiple of 16) -gop GOPSize - GOP size for MCTF (2,4,8,16,32,64, default: 16) -qp QP - QP for motion estimation and mode decision (>0, default: 26)

PSNRStatic <w> <h> <org> <rec> [<t> [<skip> [<strm> <fps>]]]

- rec: reconstructed file - t: number of temporal downsampling stages (default: 0) - strm: coded stream - frms: frames per second

PSNRStatic 176 144 org.yuv rec.yuv 0 0 str.svc 15 2>PSNR.txt

type PSNR.txt128,00 32,23 38,79 39.02(1) bit-rate in kbit/s, (2) Y-PSNR in dB – luminance component, (3) U-PSNR in dB – chrominance component U or Cb, (4) V-PSNR in dB – chrominance component V or Cr


Fixed QP encoder - FixedQPEncoderStatic.exe Find the basis quantization parameter to meet

A rate or a quality constraint for single layer coding The rate or quality constraints for the layers of a scalable

stream

SIP Analyser tool – SIPAnalyser.exe Make the selective inter-layer prediction decision

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FixedQPEncoderStatic <rc_cfg>

rc_cfg : the rate control parameter file configuring the fixed QP encoder

SIPAnalyser.exe <sip_cfg> [FileLabel]

sip_cfg : the SIP parameter file FileLabel : A suffix to the output filename

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Use Examples Use Examples as a Brief Tutorialas a Brief Tutorial- Single Layer Coding- Single Layer Coding

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Original Sequences GenerationOriginal Sequences Generation

Goal YUV 시퀀스를 시공간적으로 다운샘플된 4CIF, CIF 로 생성

The original CIF resolution sequences BUS_352x288_30_orig_01.yuv, FOREMAN_352x288_30_orig_01.yuv FOOTBALL_352x288_30_orig_01.yuv MOBILE_352x288_30.yuv

URL : ftp.tnt.uni-hannover.de/pub/svc/testsequences/

Original Sequences GenerationOriginal Sequences Generation

How to generate dowsampled versions Test file : SOCCER_352x288_30_orig_02.yuv

Change : SOCCER_352x288_30.yuv Down-sampling original CIF 30Hz sequence to QCIF 15Hz

sequence for the CIF scenario

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Single Layer CodingSingle Layer Coding

Single layer coding Encoded bit-stream does not provide several spatial

resolutions or several bit-rates for a specific spatio-temporal resoultion

Generated bit-stream contains spatial or CGS/MGS enhancement layer

Preparation for encoding “SOCCER_176x144_15.yuv” 아래 폴더에서 encoder.cfg 와 layer0.cfg 를 C:\jsvm\bin 에

복사 C:\jsvm\JSVM\H264Extension\data

encoder.cfg 와 layer0.cfg 를 수정

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encoder.cfg 수정 아래 나와 있는 옵션들을 각각 수정

layer0.cfg 수정

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# JSVM Main Configuration File

OutputFile test.264 # Bitstream fileFrameRate 30.0 # Maximum frame rate [Hz]FramesToBeEncoded 150 # Number of frames (at input frame rate)GOPSize 16 # GOP Size (at maximum frame rate)BaseLayerMode 2 # Base layer mode (0: AVC w larger DPB, # 1:AVC compatible, 2:AVC w subseq SEI)SearchMode 4 # Search mode (0:BlockSearch, 4:FastSearch)SearchRange 32 # Search range (Full Pel)NumLayers 1 # Number of layersLayerCfg layer0.cfg # Layer configuration file

# JSVM Layer Configuration File

InputFile SOCCER_176x144_15.yuv # Input fileSourceWidth 176 # Input frame widthSourceHeight 144 # Input frame heightFrameRateIn 15 # Input frame rate [Hz]FrameRateOut 15 # Output frame rate [Hz]


Encoder call for single-layer coding

Result : test.264 and rec_layer0.yuv

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Extracting a temporal sub-sequence

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Decoding a temporal sub-sequence

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Use of PSNR tool

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1 svc (scalable video coding) & jsvm (joint scalable video model) kyumin jeong...

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