JSVM 9.19.7：H.264/SVC 测试软件详述与配置指南

需积分: 9 103 浏览量更新于2024-07-20 收藏 644KB DOC 举报

本文档是关于JSVM (Joint Scalable Video Model) 软件的手册，版本为JSVM9.19.7，最后一次更新日期为2010年1月16日。JSVM是ISO/IEC Moving Pictures Experts Group (MPEG) 和 ITU-T Video Coding Experts Group (VCEG) 的联合视频团队（JVT）为Scalable Video Coding (SVC) 项目开发的工具。手册详尽地介绍了如何在Windows 32/64位和Linux 32/64位平台上构建和配置该软件。首先，获取最新JSVM软件的方法在1.1节中有描述，提供访问链接和更新指引。文档强调了软件版本控制系统CVS（Concurrent Versions System），1.2节解释了其结构，这对于开发者跟踪源代码和协作非常重要。在1.3节，构建过程被分为两个部分： 1.1.1 Windows平台：使用Microsoft Visual Studio进行构建，说明了所需的设置、依赖项和编译步骤，确保开发者可以顺利在Windows环境中运行和调试JSVM。 1.1.2 Linux平台：针对gcc编译器版本4.7的指导，讲解了如何在Linux环境下编译，包括必要的库和环境变量配置。 2.1节详细介绍了JSVM软件的使用和配置，包括对空间可扩展性、随机可扩展性和组合可扩展性等不同场景的实例，帮助用户理解和实现不同的编码和解码策略。此外，手册还提供了关于如何将新工具集成到软件中的指导，以及验证新工具是否符合预期功能的过程。这部分内容对于那些希望贡献代码或改进现有工具的开发者来说，是非常重要的参考。最后，手册的目录涵盖了广泛的内容，从概述到具体的开发实践，为用户提供了全面的参考资源。无论是为了执行SVC编码还是进行相关研究，这份文档都是一个宝贵的工具指南。阅读这份JSVM软件手册可以帮助开发人员深入了解其工作原理、安装步骤、使用方法以及如何维护和扩展这个关键的视频编码工具。

The parameters , , and  are optional. The parameter  specifies the number of temporal down-

sampling stages. Only every (01102 image is written to the output file. It is not possible to specify

negative values (i.e. temporal upsampling) for the parameter . With the parameter $ it can be

specified how many frames at the beginning of the input sequence shall be skipped. And with the

optional parameter%", a maximum number of output frames that shall be produced can be specified.

2.1.2 Resampling methods

The parameter  specifies the method/filters to be used for the resampling process. Four values

(0, 1, 3, and 4) are supported for the upsampling and only two for the downsampling (0 and 1). The

specific value of 2 is reserved to the 0 process.

## .""

When  is set to 0, the SVC normative upsampling method designed to support the Extended

Spatial Scalability is applied. It is based on a set of 4-taps filters. These integer-based 4-tap filters are

originally derived from the Lanczos-3 filter. Any inter-layer scaling ratios, which can also be different

in horizontal and vertical, are supported.

When  is set to 1, only dyadic rescaling ratios are supported. The upsampling is realized via

several dyadic stages. By default, in each stage, every second sample in horizontal and vertical

direction is presented by the samples of the input image, and the missing luma samples are

interpolated using the AVC half-sample interpolation filter {1, -5, 20, 20, -5, 1}?/?32. The missing

chroma samples are interpolated using the “very simple” filter {16,16}/32.

Note that the ratio between the input and output dimensions shall be a power of 2.

When  is set to 3, the upsampling method is achieved applying the three-lobed Lanczos-

windowed sinc functions . Any inter-layer scaling ratios, which can also be different in horizontal and

vertical, are supported.

When  is set to 4, a combination of the AVC half-sample filter (see above) and a bi-linear filter

is used.

### /"

When  is set to 0, the downsampling method based on the Sine-windowed Sinc-function is

applied. A set of filters has been designed to support the extended range of spatial scaling ratio

required by ESS. Any inter-layer scaling ratios, which can also be different in horizontal and vertical,

are supported.

When  is set to 1, we switch on dyadic downsampling mode. As for the dyadic upsampling the

downsampling is done via several stages, where in each stage a scaling factor of 0.5 is applied in both

horizontal and vertical direction. In each stage the input images are filtered with the MPEG-4

downsampling filter {2, 0, -4, -3, 5, 19, 26, 19, 5, -3, -4, 0, 2}?/?64 and the output is presented by every

second sample (in horizontal and vertical direction) of the filtered images. Note that the ratio between

the input and output dimensions shall be a power of 2.

In Example 8, the command line call for down-sampling a 4CIF (704x576 samples) sequence with a

frame rate of 60Hz to a QCIF (176x144 samples) sequence with a frame rate of 15Hz is illustrated.

Please note that this example uses  which is not the recommended method for the simulations

with the JSVM (see section 3.1). In Example 9, the resampling of a CIF (352x288 samples) 30Hz

sequence to a 528x432 15Hz sequence using the SVC normative upsampler is illustrated.

C4%":=,$+D/<:=#+D/0'

-.!KA%&K1%.61A5BK1B%%/.6B&5B

53:=&$+D/#C"&#+D/ '

-.!D&LL.6DA5&LM%DM&L*%D$B&5AB

 11 Date Saved: 2016-09-08

2.1.3 Specific features

Two specific resampling features originally introduced for the ESS are supported: cropping window

and chroma phase shift management.

#& ""（剪切窗口）

The use of the cropping features allows generating the "3 as a cropped area (window)

of the input sequence.

Cropping parameters are specified by using the E& &&&option. Cropping parameters can be specified

either for the entire sequence or for each picture of the sequence. Thus, after the E option the crop

0 set to ' for sequence level or to ( for picture level shall be specified.

If )!&is chosen, then " !0!!! will follow

the . Where !0!represent the coordinates of the upper left corner of the 

 and ! and ! represent respectively its width and height.

If !&is chosen, the crop  argument is followed by argument %which specifies

the filename of the file containing the cropping parameters. , is made up of four

integers separated by commas as following: “!80!8!8!”. The meaning

of these parameters is the same as above. In case, the file contains less lines than the number of

pictures in the output sequence, the cropping parameters of the last line will be used for the following

pictures. Example 10 illustrates the structure of a cropping parameter file.

$*!!&%&#&+&"&%

9*$:95$:9$:9$:<<A

9*$:95$:9$:9$:<<B

9*$:95$:9$:9$:<<

9*$:95$:9$:9$:<<D



Example 11 illustrates the resampling of a 720p (HD) sequence with a resolution of #45-6#5 samples

and a frame rate of 7589to an SD sequence with a resolution of 6#5-76: samples and a frame rate of

#789. Note that with this example, the aspect ratio of the samples is kept, but the left and right border

of the HD sequence in :!; format are cut off in order to obtain an SD sequence in 7!+ format. First an

area of 900x720 samples if cropped out of the middle of an HD pictures (horizontal offset of 190

samples), and then these cropped pictures are downsampled with a resampling factor of 4/5 in both

horizontal and vertical direction.

3+4/7C$B$8#$+D94/7B$#B,8#+D9

-.!*BLAKAKA&A5KA&K1!-&5AA*B

<*

BNAANAAKA

Note that the resampler can be used in 0 mode by setting the  argument to . In case no

, option is specified, the width and height of the cropping window are the output parameters 

and .

#&# "（色度相位偏移管理）

By using the -#& &&&option followed by the " ! !!, ! !!08! !!

and! !!0, the horizontal and vertical phase shift the chroma components in comparison to the

luma component can be specified in quarter luma samples for the input sequence as well the horizontal

 12 Date Saved: 2016-09-08

and vertical chroma phase shift of the output sequence can be specified. The allowed value for this

parameter should be in the range of -(, inclusive'

#&& *"

The resampling mode is specified by using the ,"" option. The goal of this mode is to

allow the resampling of both progressive or interlace material. Any conversion/resampling

combinations are allowed. The ! can takes value in [0..5].

When !is set to$8the resampling is applied on pure progress sive material. The input

and output (high and low resolution ) are". This is the default mode.

When !is set to8the resampling is applied on pure interlaced material. The input and

output (high and low resolution ) are.

When !is set to8the resampling is applied considering a "   resolution

sequence and an    resolution sequence. Each low resolution frame coincide with a top

field of the high resolution interlaced material.

When !is set to&8the resampling is applied considering a "   resolution

sequence and an     resolution sequence. Each low resolution frame coincide with a

bottom field of the high resolution interlaced material.

When !is set to"8the resampling is applied considering an    resolution

sequence and a "   resolution sequence. The frame rate of the high resolution material is

twice the frame rate of the low resolution material. The low resolution interlaced sequence is

considered as -%( meaning that the " field of the first low resolution frame coincide with the

first frame of the high resolution sequence. Then, the " field of the second low resolution frame

coincide with the third frame of the high resolution sequence. Etc. Note that when using this option an

implicit temporal down-sampling stage is applied.

When !is set to#8the resampling is applied considering an    resolution

sequence and a "   resolution sequence. The frame rate of the high resolution material is

twice the frame rate of the low resolution material. The low resolution (interlaced) sequence is

considered as "-%( meaning that the  field of the first low resolution frame coincide

with the first frame of the high resolution sequence. Then, the  field of the second low

resolution frame coincide with the third frame of the high resolution sequence. Etc. Note that when

using this option an implicit temporal down-sampling stage is applied.

2.2 Encoder “H264AVCEncoderLibTestStatic”

The encoder can be used for generating AVC or SVC bit-streams. The basic encoder call is illustrated

in Example 12. At this "%+ represents the filename of the main configuration file. The main

configuration file shall be specified for each encoder call. In addition to the configuration file, several

command line options can be specified.

A

01%".,2(3!*<9<:;=

It should be noted that using the encoder does not guarantee rate-distortion efficient coding. For

obtaining optimized encoding results the encoder configuration has to be carefully specified. Special

care has to be taken when running the encoder in, since the coding efficiency generally

decrease with the supported scalability options. It should further be noted that the current encoder

implementation does not provide a rate-control. The bit-rate needs to be controlled by selecting

appropriate quantization parameters. Examples for using the encoder are described in section?.

The encoder can be run in  coding modes: <   and 

. Although single-layer bit-stream can also be generated in the scalable coding mode, the

single-layer coding mode provides more flexibility but lacks the support the generating scalable bit-

streams. The encoding mode is specified by the parameter  inside the main configuration

 13 Date Saved: 2016-09-08

剩余63页未读，继续阅读

smilehehe110

粉丝: 53
资源: 30

JSVM 9.19.7：H.264/SVC 测试软件详述与配置指南

JSVM Reference Software

jsvm9.19.7.rar

JSVM9.8源代码

JSVM最新版本

SVC的开源代码JSVM

JSVM9.19.15

JSVM SoftwareManual_9.18

SoftwareManual

JSVM_SoftwareManual

一个基于 Vue.js 的简单游戏项目示例：猜数字游戏 这个游戏的目标是让用户猜测一个随机生成的数字，并根据用户的输入给出提示

最新资源

一个基于 Vue.js 的简单游戏项目示例：猜数字游戏这个游戏的目标是让用户猜测一个随机生成的数字，并根据用户的输入给出提示