|
|
Grass Valley Canopus HQ/HQX v.7.0 (Win32/64)Grass Valley的HQ编解码器
Grass Valley的HQ编解码器
（非专业翻译）仅供参考
根据视频画面，动态调整压缩率，Grass Valley的HQ编解码器，是为了实现较高的画质质量到DVCPRO HD和HDCAM。
如果比特率是固定的磁带介质中的格式，它可能是视频中不足的重现性详细非常复杂。但不一样，一直沿用的草谷HQ编解码器在“可变比特率”。此外，为了防止数据变得太大，并且它是可以设置最大比特率限制。在保持图像质量的同时，能够减少数据量的的可变比特率的方法是非线性编辑系统中的一大优势。
预过滤器的作用
HDCAM，DVCPRO HD，减少1440（HDCAM）19201280（DVCPRO HD格式）像素在水平方向上，通过预过滤器，当录制到磁带媒体。应用一个预过滤器，以及在非线性编辑系统中中是常见的，这取决于是否在软件中或在硬件中完成，其的图像质量的很大的区别。
应用于实时软件预过滤器的理想特性是不可能与CPU处理能力当前。它已作出回应，因此，而牺牲其他产品的性能，已成为导致图像质量下降处理速度越来越多。
通过实现硬件预过滤器的理想特性HD deck level，HDWS series，保持很高的图像质量。
1920×1080的对应：
Grass Valley的HQ编解码器也兼容1920×1080的全高清分辨率。这是发达国家的假设HD D5，HDCAM SR录像机用于CM-密集型的制作演播室和高清视频录制，企业管治的工作流程的。
因为通过预过滤器，进行直接压片不具有降采样的情况的，能够实时编辑，同时保持几乎完全的原始的频率特性。
草谷HQ编解码器的可变比特率系统中和基础技术，我已经意识到的压缩效率。它可以压缩到原始图片约1/5的大小。
Alpha通道支持：
现在支持alpha通道8位是世界上第一个编解码器HD.By草谷HQ编解码器和CG3D软件和Adobe After Effects中，数据传送相比，中创建存储连续的静止图像，努力和时间这也可以显著着减少文件大小。详细信息alpha通道支持。
它也可以在bin窗口的alpha信息添加到输出的mat文件。
主页: http://pro.grassvalley.jp/catalog/hqcodec/hq_codec.htm
Grass Valley的HQX编解码器
传统Grass Valley的 HQ编解码器着并进一步演变的特点，我真正的实现了高品质和高效率的。
图像质量和实时高速处理
帧内压缩等技术
对应的YCbCr 4:2:24:2:2分量（）
带alpha通道的数据对应（4:2:2:4 YCbCrA）
10bit的深度
支持1920×108050i/59.94i，也50p/59.94p的
支持4K分辨率（4096×2160）
帧的大小/速率牢不可破的支持，领域秩序，由广播格式和像素宽高比的约束
自适应转换过程，可以有效应对隔行扫描视频
逐行扫描模式，可以有效应对逐行扫描视频
（图片退化时多次压缩与解压缩很小）high resistance Generation
从高图像质量与为未压缩的低比特率，这可应用于灵活
更多信息: http://www.grassvalley.com/docs/WhitePapers/professional/GV-4097M_HQX_Whitepaper.pdf
原文参考：
Grass Valley HQ Codec
Adjust the compression rate dynamically according to the image, Grass Valley HQ Codec is to achieve high image quality of DVCPRO HD and more than HDCAM.
If the bit rate is fixed in the format as tape media, it is possible that the lack of reproducibility of detail in the video very complex. But do not be like that has been adopted in the Grass Valley HQ Codec In the “variable bit rate”. In addition, in order to prevent data from getting too big, and it is to be able to set the limit of the maximum bit rate. Variable bit rate method it is possible to reduce the amount of data while maintaining the image quality is a big advantage for the non-linear editing system.
The role of the pre-filter
HDCAM, DVCPRO HD, has reduced 1440 (HDCAM) 1920 pixels in the horizontal direction, in 1280 (DVCPRO HD) by the pre-filter when recording to tape media both. Applying a pre-filter as well in non-linear editing system is common, big difference in the image quality depending on whether done in software or in hardware do it.
Be applied to real-time software pre-filter of the ideal characteristics is not possible with CPU processing power of current. It has responded by increasing the processing speed at the expense of performance in other products therefore, has become a cause of image degradation.
By implementing hardware with pre-filter ideal characteristics HD deck level, HDWS series, maintaining high image quality.
1920×1080 correspondence:
Grass Valley HQ Codec is also compatible to the full HD resolution of 1920×1080. It was developed on the assumption workflow with HD D5 and HDCAM SR deck used in the CM-intensive production studio and HD video recording, the CG.
Because through the pre-filter, is subjected to direct compression without having to down-sampling, and enables real-time editing while maintaining almost completely the frequency characteristics of the original.
The variable bit rate system and basic technology of Grass Valley HQ Codec, I have realized the compression efficient. It can be compressed to about 1/5 the size of the original picture.
Alpha channel support:
I now supports alpha channel 8-bit is the world’s first codec HD.By storing in the Grass Valley HQ Codec and CG that was created in 3D software and Adobe After Effects, as compared to the data delivery are sequential still images, effort and time, it can be also significantly reduce the file size You. Details of alpha channel support here .
It is also possible to output the mat file added with the alpha information in bin window.
Home: http://pro.grassvalley.jp/catalog/hqcodec/hq_codec.htm
Grass Valley HQX Codec
Traditional Grass Valley HQ Codec and further evolve the characteristics of, I realized the high quality and high efficiency true.
image quality and real-time high-speed processing
intra-frame compression
4:2:2 component (YCbCr 4:2:2) corresponding
corresponds to (YCbCrA 4:2:2:4) with alpha channel data
10bit depth
Supports 1920 × 1080 50i/59.94i, also 50p/59.94p
Support for up to 4k resolution (4096 × 2160)
Support for frame size / rate unbreakable bound by broadcasting format, field order, and pixel aspect ratio
Adaptive conversion process that can respond effectively to interlaced video
progressive mode that can respond effectively to the progressive video
(picture degradation when repeated compression and decompression is small) high resistance Generation
to low bit rate from the high image quality comparable to uncompressed, it can be applied to flexible
More info: http://www.grassvalley.com/docs/WhitePapers/professional/GV-4097M_HQX_Whitepaper.pdf
下载链接：
|
|
|
|
|
|
|
|
|
|
[复制链接]
