摘要:
A technique for encoding and decoding video information uses a plurality of video processing modules (VPMs), whereby each video processing module is dedicated to a particular video processing function, such as filtering, matrix arithmetic operations, and the like. Information is transferred between the video processing modules using a set of first-in first-out (FIFO) buffers. For example, to transfer pixel information from a first VPM to a second VPM, the first VPM stores the pixel information at the head of a FIFO buffer, while the second VPM retrieves information from the tail of the FIFO buffer. The FIFO buffer thus permits transfer of information between the VPMs without storage of the information to a cache or other techniques that can reduce video processing speed.
摘要:
A video decoder includes an entropy decoding device that generates entropy decoded (EDC) data from an encoded video signal. A multi-format video decoding device includes a plurality of vector processor units that generate a decoded video signal from the EDC data. The plurality of vector processing units includes at least one filter vector processor that operates in conjunction with a plurality of programmable filter parameters.
摘要:
A technique for encoding and decoding video information uses a plurality of video processing modules (VPMs), whereby each video processing module is dedicated to a particular video processing function, such as filtering, matrix arithmetic operations, and the like. Information is transferred between the video processing modules using a set of first-in first-out (FIFO) buffers. For example, to transfer pixel information from a first VPM to a second VPM, the first VPM stores the pixel information at the head of a FIFO buffer, while the second VPM retrieves information from the tail of the FIFO buffer. The FIFO buffer thus permits transfer of information between the VPMs without storage of the information to a cache or other techniques that can reduce video processing speed.
摘要:
An encoding system includes a first signal interface for receiving a first video signal in a first format. A second signal interface receives a second video signal in a second format. A first encoding module generates a first processed video signal in a third format. A second encoding module generates a second processed video signal in a fourth format, wherein the second processed signal is generated contemporaneously with the first processed video signal and wherein the first format differs from the third format and the second format differs from the fourth format.
摘要:
A system and a method to manage the presentation of video to one or more display clients are disclosed herein. The video can be presented in a fast forward presentation mode, a fast reverse presentation mode, and a reverse presentation mode. Additionally, the presentation of the video can be paused and then resumed, or shifted by a certain time or number of frames. In at least one embodiment, a frame index is utilized when changing the presentation rate or the direction of the presentation. The frame index can be used to identify and/or locate certain frames of the video. Once located and/or identified, the order of the frames can be manipulated and/or a subset of the frames can be selected to generate different presentation modes of the video.
摘要:
A motion identification signal is generated, based on a sequence of pictures of a video signal. A motion adaptive filter is adapted based on the motion identification signal. A scene change detection signal is generated based on the motion identification signal. A cadence detection signal can also be generated based on the motion identification signal.
摘要:
A motion compensation module can be used in a video encoder for encoding a video input signal that includes a sequence of images that are segmented into a plurality of macroblocks. The motion compensation module includes a shared memory and a motion search module that generates a motion search motion vector for a plurality of subblocks for a plurality of partitionings of a macroblock of a plurality of macroblocks and generates a selected group of the plurality of partitionings and stores the selected group of partitionings and the corresponding motion search motion vectors in the shared memory. A motion refinement module retrieves the selected group of partitionings and the corresponding motion search motion vectors from the shared memory, that generates a refined motion vector for the plurality of subblocks for the selected group of the plurality of partitionings of the macroblock of the plurality of macroblocks, based on the motion search motion vector for each of the plurality of subblocks of the macroblock of the plurality of macroblocks.
摘要:
A video processing device includes an interface to receive an input video stream and an interface to provide an encoded video stream. The input video stream includes a sequence of frames. Each frame comprises two fields. The video processing device further includes an encoder to encode the input video stream to generate the encoded video stream. The encoder is to dynamically switch between a first encoding mode and a second encoding mode responsive to a variable quantization parameter. In the first encoding mode the encoder is to encode both fields or the complete frame of a corresponding frame of the sequence. In the second encoding mode the encoder is to encode only one field of the two fields of a corresponding frame of the sequence. This approach can achieve a specified low bit rate with reduced quantization effects while keeping the horizontal resolution unchanged.
摘要:
A video processing device includes a complexity estimation module to determine a first sum of variances metric and a first estimated picture encoding cost metric for a first picture of a video stream. The video processing device further includes a scene analysis module to determine a first threshold based on a first statistical feature for sum of variance metrics of a set of one or more pictures preceding the first picture in the video stream and a second threshold based on a second statistical feature for estimated picture encoding cost metrics of the set of one or more pictures. The scene analysis module further is to identify a scene change as occurring at the first picture based on the first sum of variances metric, the first estimated picture encoding cost metric, the first threshold, and the second threshold.
摘要:
A metric representing the sum of variances for pixel blocks of a region of an image are used to identify the presence a video feature of the image, and a transcoding is performed responsive to identifying the presence of the video feature. The identified video feature can include, but is not limited to, a scene change, the presence of a black border region or a caption region, or the complexity of the image. The transcoding operation can include, but is not limited to, coding the image as an Intra-frame, omitting the content corresponding to the black border region or the caption region from the transcoded image or allocating a relatively lower bit budget for the black border region or a relatively higher bit budget to the caption region during transcoding of the image, or setting the bit budget for rate control during transcoding.