公开(公告)号：US06192154B1

公开(公告)日：2001-02-20

申请号：US09013149

申请日：1998-01-26

申请人： Rajesh Rajagopalan ,  Peter Westerink

发明人： Rajesh Rajagopalan ,  Peter Westerink

IPC分类号： G06K936

CPC分类号： H04N19/87 ,  H04N19/115 ,  H04N19/124 ,  H04N19/14 ,  H04N19/142 ,  H04N19/15 ,  H04N19/172 ,  H04N19/176 ,  H04N19/177 ,  H04N19/179 ,  H04N19/182 ,  H04N19/192 ,  H04N19/61

摘要： Systems and methods are provided for encoding units of digital information such as pictures, whereby all the data is first analyzed by running a compression pass over all the data, using the in the encoder embedded rate control mechanism. Picture attributes, such as quantization scale setting and bits produced will be extracted from the resulting bitstream, and analyzing this, indiviudal unit (picture) quantization scale and bit allocation settings are prepared for a next pass for either a constant- or variable bit rate, whereby buffer boundaries are observed. In a second compression pass through the same data, a constant- or variable bit rate compressed bitstream is produced, but this time bypassing the embedded rate control mechanism, and using the prepared picture bit allocation and quantization scale settings instead. Additionally, a mechanism will supervise the total bit production accuracy.

摘要翻译： 提供了用于编码诸如图片的数字信息的单元的系统和方法，其中使用编码器嵌入速率控制机制中的所有数据首先通过对所有数据进行压缩传递来分析所有数据。 将从所得到的比特流中提取诸如量化比例设置和产生的比特率的图像属性，并且分析这个独立单位（图像）量化比例和比特分配设置，用于下一次通过恒定或可变比特率， 从而观察到缓冲区边界。 在通过相同数据的第二次压缩传递中，产生常数或可变比特率压缩比特流，但是这次绕过嵌入式速率控制机制，并改为使用准备的图像比特分配和量化比例设置。 另外，一种机制将监督总位生产精度。

公开(公告)号：US06614935B2

公开(公告)日：2003-09-02

申请号：US09666667

申请日：2000-09-20

申请人： Rajesh Rajagopalan ,  Peter Westerink

发明人： Rajesh Rajagopalan ,  Peter Westerink

IPC分类号： G06K936

CPC分类号： H04N19/87 ,  H04N19/115 ,  H04N19/124 ,  H04N19/14 ,  H04N19/142 ,  H04N19/15 ,  H04N19/172 ,  H04N19/176 ,  H04N19/177 ,  H04N19/179 ,  H04N19/182 ,  H04N19/192 ,  H04N19/61

摘要： Systems and methods are provided for for encoding units of digital information such as pictures, whereby all the data is first analyzed by running a compression pass over all the data, using the in the encoder embedded rate control mechanism. Picture attributes, such as quantization scale setting and bits produced will be extracted from the resulting bitstream, and analyzing this, indiviudal unit (picture) quantization scale and bit allocation settings are prepared for a next pass for either a constant- or variable bit rate, whereby buffer boundaries are observed. In a second compression pass through the same data, a constant- or variable bit rate compressed bitstream is produced, but this time bypassing the embedded rate control mechanism, and using the prepared picture bit allocation and quantization scale settings instead. Additionally, a mechanism will supervise the total bit production accuracy.

公开(公告)号：US07286571B2

公开(公告)日：2007-10-23

申请号：US10199236

申请日：2002-07-19

申请人： John Norman Mailhot ,  R. Scott McCaskill ,  Rajesh Rajagopalan ,  Robert A. Resuta ,  Michael J. Scheutzow

发明人： John Norman Mailhot ,  R. Scott McCaskill ,  Rajesh Rajagopalan ,  Robert A. Resuta ,  Michael J. Scheutzow

IPC分类号： H04J3/02

CPC分类号： H04N21/8126 ,  H04N7/17309 ,  H04N21/23614 ,  H04N21/2365 ,  H04N21/23655 ,  H04N21/4347 ,  H04N21/4348

摘要： The present invention provides systems and methods for providing on-demand datacasting. A system according to an exemplary embodiment of the present invention comprises a rate generator for controlling the rate at which data signals are combined with audio/video signals. The system may also include a system controller for controlling the rate of the rate generator. The system controller may also monitor the complexity of the audio/video signals, calculate an average complexity of the audio/video signals, calculate an average complexity of the audio/video signals and determine whether the average complexity is greater than the typical complexity of audio/video signals. The system controller may adjust the rate of the rate generator based on the determination of whether the average complexity of the audio/video signals is greater than the typical complexity of audio/video signals.

摘要翻译： 本发明提供了用于提供按需数据广播的系统和方法。 根据本发明的示例性实施例的系统包括用于控制数据信号与音频/视频信号组合的速率的速率发生器。 系统还可以包括用于控制速率发生器的速率的系统控制器。 系统控制器还可以监视音频/视频信号的复杂性，计算音频/视频信号的平均复杂度，计算音频/视频信号的平均复杂度，并且确定平均复杂度是否大于典型的音频复杂度 /视频信号。 系统控制器可以基于音频/视频信号的平均复杂度是否大于音频/视频信号的典型复杂度的确定来调整速率发生器的速率。

公开(公告)号：US06181742B2

公开(公告)日：2001-01-30

申请号：US09013148

申请日：1998-01-26

申请人： Rajesh Rajagopalan ,  Thomas McCarthy ,  Cesar Gonzales

发明人： Rajesh Rajagopalan ,  Thomas McCarthy ,  Cesar Gonzales

IPC分类号： H04N712

CPC分类号： H04N19/152 ,  H04N19/115 ,  H04N19/14 ,  H04N19/149 ,  H04N19/15 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196 ,  H04N19/60 ,  H04N19/61

摘要： Systems and methods are provided for allocating bits to pictures in accordance with the bit allocation constraints for operation at both constant and variable bit rates. A statistical complexity measure which is an estimate of the average encoding complexity of the entire data is updated after encoding each picture. This set of parameters, along with an estimate of the encoding complexity of the current picture and the desired average coding rate is used to allocate target bits for encoding the current picture. One method of allocating bits to a picture is to used the statistical complexity measure to vary the instantaneous rate of encoding and allocate bits for this picture so as to generate encoded data at this rate. Another method is to modulate the target generated by a conventional encoder using the current level of the Virtual Buffer Verifier and the deviation of the estimated encoding complexity of the current picture from the statistical complexity measures.

摘要翻译： 提供了系统和方法，用于根据用于在恒定和可变比特率下操作的比特分配约束来向比特分配比特。 统计复杂度测量是对整个数据的平均编码复杂度的估计，在对每个图像进行编码之后被更新。 使用这组参数以及当前图像的编码复杂度的估计和期望的平均编码率来分配用于编码当前图像的目标比特。 将比特分配给图像的一种方法是使用统计复杂度度量来改变编码的瞬时速率并为该图像分配比特，以便以该速率生成编码数据。 另一种方法是使用当前级别的虚拟缓冲验证器来调制由常规编码器产生的目标，以及当前图像的估计编码复杂度与统计复杂性度量的偏差。