公开(公告)号：US20110310958A1

公开(公告)日：2011-12-22

申请号：US13165015

申请日：2011-06-21

申请人： Ravin SACHDEVA ,  Sumit JOHAR ,  Daniele ALFONSO

发明人： Ravin SACHDEVA ,  Sumit JOHAR ,  Daniele ALFONSO

IPC分类号： H04N7/26

CPC分类号： H04N19/42 ,  H04N19/91

摘要： An embodiment relates to a decoder for decoding CABAC encoded video data in real time for HDTV applications. The decoder comprises a binary arithmetic decoder block for converting an input bit stream into a bin string, a context memory for storing a plurality of context values, and a plurality of finite state machines. Each of the finite state machines is adapted for decoding a particular one of the H.264 syntax elements by providing the binary arithmetic decoder block with an index of the relevant context value within the context memory and by converting the resulting bin stream into a value of the current syntax element. In this manner, a performance of one bin per cycle may be achieved.

摘要翻译： 实施例涉及用于HDTV应用实时解码CABAC编码视频数据的解码器。 解码器包括用于将输入比特流转换成bin字符串的二进制算术解码器块，用于存储多个上下文值的上下文存储器以及多个有限状态机。 每个有限状态机适于通过向二进制算术解码器块提供上下文存储器内的相关上下文值的索引来解码H.264语法元素中的特定一个，并且通过将所得到的bin流转换为 当前语法元素。 以这种方式，可以实现每个循环一个箱的性能。

公开(公告)号：US20100067580A1

公开(公告)日：2010-03-18

申请号：US12559152

申请日：2009-09-14

申请人： Ravin SACHDEVA ,  Sumit JOHAR ,  Emiliano Mario PICCINELLI

发明人： Ravin SACHDEVA ,  Sumit JOHAR ,  Emiliano Mario PICCINELLI

IPC分类号： H04N7/32

CPC分类号： H04N19/521 ,  H04N19/156 ,  H04N19/164 ,  H04N19/176 ,  H04N19/187 ,  H04N19/33 ,  H04N19/40 ,  H04N19/513 ,  H04N19/59 ,  H04N19/61

摘要： Systems and methods are for implementing a NSV2SV converter that converts a non-scalable video signal to a scalable video signal. In an implementation, a non-scalable video signal encoded in H.264/AVC standard is decoded and segmented into spatial data and motion data. The spatial data is resized into a desired resolution by down-sampling the spatial data. The motion data is also resized in every layer, except in the top layer, of a scalable video coding (SVC) encoder by using an appropriate measure. Further, the motion data is refined based on the resized spatial data in every layer of the SVC encoder. The refined motion data and the down-sampled spatial data are then transformed and entropy encoded in the SVC standard in every layer. The SVC encoded output from every layer is multiplexed to produce a scalable video signal.

摘要翻译： 系统和方法用于实现将不可缩放视频信号转换为可伸缩视频信号的NSV2SV转换器。 在实现中，以H.264 / AVC标准编码的不可缩放视频信号被解码并分割成空间数据和运动数据。 通过对空间数据进行下采样，空间数据被调整为期望的分辨率。 通过使用适当的测量，运动数据也可以在可分级视频编码（SVC）编码器的除了顶层之外的每一层中进行大小调整。 此外，基于SVC编码器的每层中的调整大小的空间数据来精细化运动数据。 然后将精细运动数据和下采样空间数据在SVC标准中进行变换和熵编码。 来自每个层的SVC编码的输出被复用以产生可分级的视频信号。

公开(公告)号：US20100158108A1

公开(公告)日：2010-06-24

申请号：US12636321

申请日：2009-12-11

申请人： Megha AGARWAL ,  Sumit JOHAR ,  Kaushik SAHA ,  Emiliano Mario Piccinelli

发明人： Megha AGARWAL ,  Sumit JOHAR ,  Kaushik SAHA ,  Emiliano Mario Piccinelli

IPC分类号： H04N7/26

CPC分类号： H04N19/48 ,  H04N19/115 ,  H04N19/149 ,  H04N19/152 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61

摘要： An embodiment of the present disclosure relates to system comprises an encoding device. Said encoding device comprises a compression unit, a quantizer, a bit estimator, a bit rate encoder and a variable length encoder. An embodiment also is a method of encoding. Said method estimates a number of bits to encode a macroblock after compressing the data stream. Then the estimated bit encoded by a bit rate encoder and further quantized by the quantizer to get the final encoded bit stream. The number of bits required to encode a macroblock is estimated after the quantization process and before the encoding process. The macroblock bit estimator estimates the number of bits required to encode a particular macroblock depending on the quantized AC coefficients of that macroblock and the quantized AC coefficients of the neighboring frames normalized at a macroblock level.

摘要翻译： 本公开的实施例涉及一种包括编码装置的系统。 所述编码装置包括压缩单元，量化器，比特估计器，比特率编码器和可变长度编码器。 实施例也是一种编码方法。 所述方法估计在压缩数据流之后编码宏块的位数。 然后估计比特由比特率编码器编码并由量化器进一步量化以获得最终的编码比特流。 在量化处理之后和编码处理之前估计编码宏块所需的位数。 宏块比特估计器根据该宏块的量化AC系数和在宏块级标准化的相邻帧的量化AC系数来估计对特定宏块进行编码所需的比特数。