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1. 发明申请

WO2007109186A2 SCALABLE VIDEO CODING/MULTIPLEXING COMPATIBLE WITH NON-SCALABLE DECODERS 审中-公开
标题翻译：可扩展视频编码/多路复用与非可扩展解码器兼容
公开(公告)号：WO2007109186A2
公开(公告)日：2007-09-27
申请号：PCT/US2007/006728
申请日：2007-03-16
申请人： APPLE COMPUTER, INC
发明人： HASKELL, Barin, Geoffry , SINGER, David, William , PUN, Thomas , WU, Hsi-Jung , NORMILE, James, Oliver
IPC分类号： H04N19/132 , H04N19/187 , H04N19/196 , H04N19/33 , H04N19/61 , H04N21/2343 , H04N21/2389 , H04N21/2662 , H04N21/4385 , H04N21/647
CPC分类号： H04N19/30 , H04N19/132 , H04N19/187 , H04N19/196 , H04N19/33 , H04N19/46 , H04N19/61 , H04N21/234327 , H04N21/2389 , H04N21/2662 , H04N21/4385 , H04N21/64792 , H04N21/6582 , H04N21/8451
摘要： Scalable video coding and multiplexing compatible with non-scalable decoders is disclosed. In some embodiments, video data is received and encoded in a manner that renders at least a base layer to be compatible with a non-scalable video encoding standard, including by assigning for at least the base layer default values to one or more scalability parameters. In some embodiments, video data is received and encoded to produce an encoded video data that includes a base layer that conforms to a non-scalable video encoding standard and one or more subordinate non-scalable layers, which subordinate non-scalable layers do not by themselves conform to the non-scalable video encoding standard but which can be combined with the base layer to produce a result that does conform to the non-scalable video encoding standard, such that the result can be decoded by a non-scalable decoder. An identification data identifying those portions of the encoded video data that are associated with a subordinate non-scalable layer is included in the encoded video data.
摘要翻译：公开了与不可扩展解码器兼容的可扩展视频编码和复用。在一些实施例中，视频数据以使至少基本层与不可扩展视频编码标准兼容的方式被接收和编码，包括通过将至少基本层默认值分配给一个或多个可伸缩性参数。在一些实施例中，视频数据被接收和编码以产生编码的视频数据，该编码视频数据包括符合非可分级视频编码标准的基本层和一个或多个从属不可扩展层，其中不可扩展层不属于它们符合不可扩展视频编码标准，但可以与基本层组合以产生符合非可分级视频编码标准的结果，使得结果可以由不可扩展解码器解码。识别与下级不可缩放层相关联的编码视频数据部分的识别数据被包括在编码视频数据中。

2. 发明申请

WO2005084035A2 RATE AND QUALITY CONTROLLER FOR H.264/AVC VIDEO CODER AND SCENE ANALYZER THEREFOR 审中-公开
标题翻译： H.264 / AVC视频编码器和场景分析仪的速率和质量控制器
公开(公告)号：WO2005084035A2
公开(公告)日：2005-09-09
申请号：PCT/US2005/000067
申请日：2005-01-05
申请人： APPLE COMPUTER, INC.
发明人： PURI, Atul , HASKELL, Barin, Geoffry , DUMITRAS, Adriana , NORMILE, James , WU, Hsi-Jung , NIE, Xiaochun
IPC分类号： H04N7/26
CPC分类号： H04N19/87 , H04N19/124 , H04N19/142 , H04N19/149 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/176
摘要： A rate control system is disclosed for video coding applications. The rate controller assigns a quantization parameter for video data in a picture in response to complexity indicators indicative of spatial complexity, motion complexity and/or bits per pel of the picture. A virtual buffer based quantizer parameter is proposed based on a virtual buffer fullness analysis and a target rate estimate, which is derived from the complexity indicators. A second quantizer parameter is proposed from a linear regression analysis of quantizer parameters used to code previously coded pictures of similar type (e.g., I pictures, P pictures or B pictures). A coding policy decision unit defines a final quantizer parameter from a comparison of the two proposed quantizer parameters.
摘要翻译：公开了一种用于视频编码应用的速率控制系统。速率控制器响应于指示图像的空间复杂性，运动复杂度和/或每像素的复杂度指示符，为图像中的视频数据分配量化参数。基于虚拟缓冲区丰满度分析和目标速率估计提出了一种基于虚拟缓冲器的量化器参数，其从复杂度指标中得出。从用于对相似类型（例如，I图像，P图像或B图像）的先前编码的图像进行编码的量化器参数的线性回归分析提出了第二量化参数。编码策略决定单元根据两个提出的量化器参数的比较来定义最终的量化器参数。

3. 发明申请

WO2005067302A1 METHOD AND SYSTEM FOR VIDEO ENCODING USING A VARIABLE NUMBER OF B FRAMES 审中-公开
标题翻译：使用可变数量的B框架进行视频编码的方法和系统
公开(公告)号：WO2005067302A1
公开(公告)日：2005-07-21
申请号：PCT/US2004/038693
申请日：2004-11-19
申请人： APPLE COMPUTER, INC.
发明人： DUMITRAS, Adriana , HASKELL, Barin, Geoffry
IPC分类号： H04N7/26
CPC分类号： H04N19/87 , H04N19/109 , H04N19/114 , H04N19/139 , H04N19/142 , H04N19/172
摘要： An effective method for dynamically selecting the number of I, P and B frames during video coding is proposed. Short-term look-ahead analysis of a video sequence yields a variable number of B frames to be coded between any two stored pictures. The first picture of a group of frames (GOF) may be coded as a B picture. Motion speed is calculated for each picture of the GOF with respect to the first picture of the GOF. Subject to exceptions, as long as the subsequent pictures exhibit motion speeds that are similar and motion vector displacements that are co-linear with those of the first picture in the GOF, they may be coded as B pictures. When a picture is encountered having a motion speed that is not the same as that of the first picture in the GOF, the picture may be coded as a P picture. In some embodiments, a sequence of B pictures that terminates in a P picture may be called a "group of frames" (GOF).
摘要翻译：提出了一种在视频编码过程中动态选择I，P和B帧数量的有效方法。视频序列的短期预先分析产生在任何两个存储的图像之间编码的可变数量的B帧。一组帧（GOF）的第一图像可以被编码为B图像。针对GOF的第一张照片计算GOF的每张照片的运动速度。除了例外，只要后续图像显示与GOF中的第一图像的运动速度相似的运动速度和与第一图像的运动矢量位移共线的运动矢量位移，则它们可以被编码为B图像。当遇到具有与GOF中的第一图像的运动速度不同的运动速度的图像时，图像可以被编码为P图像。在一些实施例中，终止于P图像的B图像序列可以被称为“帧组”（GOF）。

4. 发明申请

WO2006007176A3 CODING OF SCENE CUTS IN VIDEO SEQUENCES USING NON-REFERENCE FRAMES 审中-公开
公开(公告)号：WO2006007176A3
公开(公告)日：2006-01-19
申请号：PCT/US2005/018147
申请日：2005-05-24
申请人： APPLE COMPUTER, INC.
发明人： DUMITRAS, Adriana , HASKELL, Barin, Geoffry
IPC分类号： H04N7/26
摘要： A coding scheme for groups of frames that include scene cuts causes frames before and after the scene cut to be coded as non-reference frames with increased quantization parameters to reduce bandwidth. Although greater coding distortion can be expected for such frames, the distortion should be less or even not perceptible to a viewer owing to the dynamically changing image content caused by the scene change. Quantization parameter increases may vary based on: a viewing rate expected at a decoder, proximity of a frame to the scene cut, and observable motion speed both before and after the scene cut. Additionally, non-reference frames in the GOF may be coded using spatial direct mode coding.

5. 发明申请

WO2005027526A1 VIDEO ENCODING METHOD AND SCENE CUT DETECTION METHOD 审中-公开
标题翻译：视频编码方法和场景切割检测方法
公开(公告)号：WO2005027526A1
公开(公告)日：2005-03-24
申请号：PCT/US2004/015032
申请日：2004-05-13
申请人： APPLE COMPUTER, INC.
发明人： HASKELL, Barin, Geoffry , DUMITRAS, Adriana , PURI, Atul
IPC分类号： H04N7/26
CPC分类号： H04N19/87 , H04N19/114 , H04N19/142 , H04N19/147 , H04N19/177
摘要： Methods for processing a set of successive video frames in two passes to determine the number of bidirectional (B) and unidirectional (P) motion to be encoded in a video coding system. During the first pass, motion vectors and motion costs are computed for each frame and a derived cost value is computed based on the motion cost of at least one frame. The derived cost value is used determine the number (N g ) of B-frames to be encoded in the set of successive frames. In the second pass, the set of successive frames are encoded where N B) frames are encoded as B-frames and some or all motion vectors computed in the first pass are reused in the second pass. A scene cut detection method is also provided where an impulse-like increase in a ration of motion costs is monitored
摘要翻译：用于在两遍中处理一组连续视频帧以确定要在视频编码系统中编码的双向（B）和单向（P）运动的数量的方法。在第一遍期间，针对每个帧计算运动矢量和运动成本，并且基于至少一帧的运动成本来计算导出成本值。使用导出成本值确定要在该组连续帧中编码的B帧的数量（Ng）。在第二遍中，连续帧的集合被编码，其中NB）帧被编码为B帧，并且在第一遍中计算的一些或全部运动矢量在第二遍中重新使用。还提供场景切断检测方法，其中监视运动成本比例的脉冲状增加

6. 发明公开

EP1665801A1 VIDEO ENCODING METHOD AND SCENE CUT DETECTION METHOD 审中-公开
标题翻译：方法用于检测场景切换点的视频编码和方法
公开(公告)号：EP1665801A1
公开(公告)日：2006-06-07
申请号：EP04752135.6
申请日：2004-05-13
申请人： APPLE COMPUTER, INC.
发明人： HASKELL, Barin, Geoffry , DUMITRAS, Adriana , PURI, Atul
IPC分类号： H04N7/26
CPC分类号： H04N19/87 , H04N19/114 , H04N19/142 , H04N19/147 , H04N19/177
摘要： Methods for processing a set of successive video frames in two passes to determine the number of bidirectional (B) and unidirectional (P) motion to be encoded in a video coding system. During the first pass, motion vectors and motion costs are computed for each frame and a derived cost value is computed based on the motion cost of at least one frame. The derived cost value is used determine the number (Ng) of B-frames to be encoded in the set of successive frames. In the second pass, the set of successive frames are encoded where NB) frames are encoded as B-frames and some or all motion vectors computed in the first pass are reused in the second pass. A scene cut detection method is also provided where an impulse-like increase in a ration of motion costs is monitored

7. 发明公开

EP1721467A2 RATE AND QUALITY CONTROLLER FOR H.264/AVC VIDEO CODER AND SCENE ANALYZER THEREFOR 审中-公开
标题翻译：速度与质量控制对H.264 / AVC视频编码器确保两SZENENANALYSIERER
公开(公告)号：EP1721467A2
公开(公告)日：2006-11-15
申请号：EP05704910.8
申请日：2005-01-05
申请人： APPLE COMPUTER, INC.
发明人： PURI, Atul , HASKELL, Barin, Geoffry , DUMITRAS, Adriana , NORMILE, James , WU, Hsi-Jung , NIE, Xiaochun
IPC分类号： H04N7/26
CPC分类号： H04N19/87 , H04N19/124 , H04N19/142 , H04N19/149 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/176
摘要： A rate control system is disclosed for video coding applications. The rate controller assigns a quantization parameter for video data in a picture in response to complexity indicators indicative of spatial complexity, motion complexity and/or bits per pel of the picture. A virtual buffer based quantizer parameter is proposed based on a virtual buffer fullness analysis and a target rate estimate, which is derived from the complexity indicators. A second quantizer parameter is proposed from a linear regression analysis of quantizer parameters used to code previously coded pictures of similar type (e.g., I pictures, P pictures or B pictures). A coding policy decision unit defines a final quantizer parameter from a comparison of the two proposed quantizer parameters.

8. 发明公开

EP1759534A2 CODING OF SCENE CUTS IN VIDEO SEQUENCES USING NON-REFERENCE FRAMES 审中-公开
标题翻译： ENCODE场景分割视频序列中使用非参考静止图像
公开(公告)号：EP1759534A2
公开(公告)日：2007-03-07
申请号：EP05753911.6
申请日：2005-05-24
申请人： APPLE COMPUTER, INC.
发明人： DUMITRAS, Adriana , HASKELL, Barin, Geoffry
IPC分类号： H04N7/26
CPC分类号： H04N19/114 , H04N19/124 , H04N19/137 , H04N19/142 , H04N19/577 , H04N19/61
摘要： A coding scheme for groups of frames that include scene cuts causes frames before and after the scene cut to be coded as non-reference frames with increased quantization parameters to reduce bandwidth. Although greater coding distortion can be expected for such frames, the distortion should be less or even not perceptible to a viewer owing to the dynamically changing image content caused by the scene change. Quantization parameter increases may vary based on: a viewing rate expected at a decoder, proximity of a frame to the scene cut, and observable motion speed both before and after the scene cut. Additionally, non-reference frames in the GOF may be coded using spatial direct mode coding.

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