HEVC中出现的名词解释

本文详细解释了HEVC编码中的关键技术,包括PSNR、ME、MV、MC等概念,以及编码单元如CTU、CU、PB等。还介绍了运动估计、运动补偿、加权预测、AMVP等预测技术,并提到了编码和解码顺序、参考图像集、VCL NAL与no-VCL NAL的区别,以及视频参数集和补充增强信息等核心要素。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

PSNR:Peak signal to Noise Ratio峰值信噪比
ME:montion estimation运动估计
MV:motion vector运动向量
MC:motion compensation运动补偿
CTU:Coding tree unit编码树单元
CTB:Coding tree block编码树块
CU:Coding unit编码单元
CB:Coding block编码块
PU:Prediction unit预测单元
PB:Prediction block预测块
TU:Transform unit变换单元
TB:Transform block变换块
DCT:discrete cosine transform离散余弦变换
DST:discrete sine transform离散正弦变换
AMVP:Advanced motion vector prediction高级运动向量预测
URQ:uniform reconstruction quantization一致重构量化
SAO:Sample adaptive offset像素自适应偏移
VPS:Video parameter set视频参数集
SPS:Sequence parameter set序列参数集
PPS:Picture parameter set图像参数集
SEI:Supplemental enhancement information补充增强信息
VUI:Video usability information视频可用性信息
WPP:wavefront parallel processing波前平行处理
VCL:Video coding layer视频编码层
CRA:clean random access
RAP:random access point
RASL:random access skipped leading
RADL:random access decodable leading
BLA:borken link access
LP:l

H264编码开源代码 Video Usability Information (VUI) Guide by Christian Heine ( sennindemokrit at gmx dot net ) 1. Sample Aspect Ratio ----------------------- * What is it? The Sample Aspect Ratio (SAR) (sometimes called Pixel Aspect Ratio or just Pel Aspect Ratio) is defined as the ratio of the width of the sample to the height of the sample. While pixels on a computer monitor generally are "square" meaning that their SAR is 1:1, digitized video usually has rather odd SARs. Playback of material with a particular SAR on a system with a different SAR will result in a stretched/squashed image. A correction is necessary that relies on the knowledge of both SARs. * How do I use it? You can derive the SAR of an image from the width, height and the display aspect ratio (DAR) of the image as follows: SAR_x DAR_x * height ----- = -------------- SAR_y DAR_y * width for example: width x height = 704x576, DAR = 4:3 ==> SAR = 2304:2112 or 12:11 Please note that if your material is a digitized analog signal, you should not use this equation to calculate the SAR. Refer to the manual of your digitizing equipment or this link instead. A Quick Guide to Digital Video Resolution and Aspect Ratio Conversions http://www.iki.fi/znark/video/conversion/ * Should I use this option? In one word: yes. Most decoders/ media players nowadays support automatic correction of aspect ratios, and there are just few exceptions. You should even use it, if the SAR of your material is 1:1, as the default of x264 is "SAR not defined".
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值