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    • 5. 发明授权
    • System and method for fine granular scalable video with selective quality enhancement
    • 具有选择性质量增强的精细粒度可缩放视频的系统和方法
    • US06263022B1
    • 2001-07-17
    • US09347882
    • 1999-07-06
    • Yingwei ChenHayder RadhaMihaela van der Schaar
    • Yingwei ChenHayder RadhaMihaela van der Schaar
    • H04N712
    • H04N19/34H04N19/126H04N19/29
    • There is disclosed an adaptive quantization controller for use in a video encoder comprising a base layer circuit for receiving an input stream of video frames and generating compressed base layer video frames suitable for transmission to a streaming video receiver and an enhancement layer circuit for receiving the input stream of video frames and a decoded version of the compressed base layer video frames and generating enhancement layer video data associated with, and allocated to, corresponding ones of the compressed base layer video frames. The adaptive quantization controller receives at least one quantization parameter from the base layer circuit and, in response thereto, determines a corresponding shifting factor for shifting a bit plane associated with the enhancement layer video data. The adaptive quantizaion controller also modifies a data field in the enhancement layer video data to cause the video streaming receiver to assign a higher decoding priority to the shifted bit plane.
    • 公开了一种在视频编码器中使用的自适应量化控制器,其包括用于接收视频帧的输入流的基本层电路,并且生成适合于传输到流式视频接收机的压缩基本层视频帧以及用于接收输入的增强层电路 视频帧流和压缩基本层视频帧的解码版本,并且生成与压缩基本层视频帧相关联并分配给对应的压缩基本层视频帧的增强层视频数据。 自适应量化控制器从基层电路接收至少一个量化参数,响应于此,确定用于移位与增强层视频数据相关联的比特平面的相应移位因子。 自适应量化控制器还修改增强层视频数据中的数据字段,以使视频流接收机向移位的位平面分配更高的解码优先级。
    • 8. 发明授权
    • System and method for encoding and decoding the residual signal for fine granular scalable video
    • 用于对细粒度可缩放视频进行编码和解码残留信号的系统和方法
    • US06480547B1
    • 2002-11-12
    • US09419672
    • 1999-10-15
    • Yingwei ChenMihaela Van Der SchaarHayder Radha
    • Yingwei ChenMihaela Van Der SchaarHayder Radha
    • H04N712
    • H04N19/34H04N19/13H04N19/29H04N19/61H04N19/63
    • There is disclosed a video encoder and a video decoder. The video encoder comprises base layer circuitry for receiving an input stream of video frames and generating compressed base layer video data for transmission to a streaming video receiver. The base layer video data comprises original transform coefficients (O) associated with the input stream of video frames and reconstructed base layer transform coefficients (B) associated with the original transform coefficients. The video encoder also comprises enhancement layer circuitry for receiving the original transform coefficients (O) and the reconstructed base layer transform coefficients (B) and generating a residual signal (R) proportional to a difference between the original transform coefficients (O) and the reconstructed base layer transform coefficients (B). The enhancement layer circuitry encodes and sends to the streaming video receiver a sign of the residual signal (R) and the bit planes of the residual signal (R). The video decoder comprises base layer circuitry for receiving compressed base layer video data and determining reconstructed base layer transform coefficients (B) associated with a quantization of the base layer video data. The video decoder further comprises enhancement layer circuitry for receiving enhancement layer video data associated with the compressed base layer video data and determining a residual signal (R) and a sign associated with the residual signal (R). The enhancement layer circuitry reconstructs enhancement layer transform coefficients (E) from the residual signal (R) and the plurality of reconstructed base layer transform coefficients (B).
    • 公开了一种视频编码器和视频解码器。 视频编码器包括用于接收视频帧的输入流并生成用于传输到流式视频接收机的压缩基本层视频数据的基本层电路。 基层视频数据包括与视频帧的输入流相关联的原始变换系数(O)和与原始变换系数相关联的重建的基本层变换系数(B)。 视频编码器还包括用于接收原始变换系数(O)和重构的基本层变换系数(B)的增强层电路,并产生与原始变换系数(O)和重建的变换系数(O)之间的差成比例的残差信号 基层变换系数(B)。 增强层电路对流视频接收机编码残留信号(R)的符号和残留信号(R)的位平面。 视频解码器包括用于接收压缩的基本层视频数据和确定与基本层视频数据的量化相关联的重建的基本层变换系数(B)的基本层电路。 视频解码器还包括增强层电路,用于接收与压缩的基本层视频数据相关联的增强层视频数据,并确定残余信号(R)和与残留信号(R)相关联的符号。 增强层电路从剩余信号(R)和多个重建的基本层变换系数(B)重建增强层变换系数(E)。
    • 9. 发明授权
    • System and method for encoding and decoding enhancement layer data using base layer quantization data
    • 使用基本层量化数据对增强层数据进行编码和解码的系统和方法
    • US06788740B1
    • 2004-09-07
    • US09411464
    • 1999-10-01
    • Mihaela van der SchaarYingwei ChenHayder Radha
    • Mihaela van der SchaarYingwei ChenHayder Radha
    • H04B166
    • H04N19/34H04N19/13H04N19/29H04N19/61H04N19/63
    • There is disclosed a video encoder comprising a base layer encoder and an enhancement layer encoder. The base layer encoder receives an input stream of video frames and generates compressed base layer video data suitable for transmission to a streaming video receiver. The enhancement layer encoder receives the input stream of video frames and a decoded version of the compressed base layer video data and generates enhancement layer video data associated with the compressed base layer video data and suitable for transmission to the streaming video receiver. The video encoder also comprises a controller associated with the enhancement layer circuitry for receiving a quantization parameter associated with the base layer video data and determining therefrom at least one all-zero bit plane associated with at least one block of the enhancement layer video data. The controller is capable of causing the enhancement layer circuitry not to transmit the at least one all-zero bit plane to the streaming video receiver.
    • 公开了一种包括基本层编码器和增强层编码器的视频编码器。 基层编码器接收视频帧的输入流,并产生适合于传输到流式视频接收机的压缩基本层视频数据。 增强层编码器接收视频帧的输入流和压缩基本层视频数据的解码版本,并且生成与压缩基本层视频数据相关联并适于传输到流视频接收器的增强层视频数据。 视频编码器还包括与增强层电路相关联的控制器,用于接收与基本层视频数据相关联的量化参数,并从中确定与增强层视频数据的至少一个块相关联的至少一个全零位平面。 控制器能够使增强层电路不将至少一个全零位平面发送到流视频接收器。
    • 10. 发明授权
    • System and method for improved fine granular scalable video using base layer coding information
    • 使用基层编码信息改进细粒度可伸缩视频的系统和方法
    • US06501797B1
    • 2002-12-31
    • US09347881
    • 1999-07-06
    • Mihaela van der SchaarYingwei ChenHayder Radha
    • Mihaela van der SchaarYingwei ChenHayder Radha
    • H04B1404
    • H04N19/34H04N19/103H04N19/137H04N19/146H04N19/187H04N19/29H04N19/33H04N19/37
    • There is disclosed an apparatus for controlling the transmission of enhancement layer video data for use in a video encoder containing a base layer encoder and an enhancement layer encoder. The base layer encoder receives input video frames and generates compressed base layer video frames suitable for transmission at a base layer bit rate to a streaming video receiver. The enhancement layer encoder compares the input video frames and a processed version of the compressed base layer video frames and generates enhancement layer video data suitable for transmission at a modifiable enhancement layer bit rate to the streaming video receiver. The apparatus comprises a base layer parameter monitor for receiving at least one base layer parameter and, in response thereto, modifying an allocation of the enhancement layer video data among corresponding ones of the compressed base layer video frames.
    • 公开了一种用于控制在包含基本层编码器和增强层编码器的视频编码器中使用的增强层视频数据的传输的装置。 基层编码器接收输入视频帧,并产生适合于以基层比特率传输的压缩基层视频帧到流视频接收机。 增强层编码器比较输入视频帧和经压缩的基本层视频帧的处理版本,并生成适于以可修改的增强层比特率传输到流式视频接收机的增强层视频数据。 该装置包括用于接收至少一个基本层参数的基本层参数监视器,并且响应于此,在相应的压缩基本层视频帧中修改增强层视频数据的分配。