Residual frame

About: Residual frame is a research topic. Over the lifetime, 4443 publications have been published within this topic receiving 68784 citations.

Video frame rate compensation through adjustment of vertical blanking

Abstract: Aspects of the present disclosure relate to systems and methods configured to adjust the timing of frame scanout in response to fluctuations in the source frame rate of graphics content rendered by a processing unit. In certain implementations, a vertical blanking interval generated during scanout of frames from a frame buffer may be adjusted in response to detected changes in the frame rate at which the source content is generated. In certain implementations, rendered graphics may be streamed over a network for display in real-time on a remote device, and the scanout out of frames may be adjusted in order to better match the rate of compression and streaming to a variable frame rate of the source content.

System for assembling playback data frames using indexed frame buffer group according to logical frame numbers in valid subcode or frame header

Abstract: Apparatus and method for assembling data read from a data storage DAT tape into data groups. A tape data processing circuit responsive to the playback of DAT tape for provides for each frame a serial frame information output including a frame header and frame data, and an associated subcode information output, the subcode information output being available in advance of the associated frame information. A processor responsive to the subcode information checks the validity of the subcode information and determines the destination group memory locations of the associated frame data, such destination group memory locations being group frame locations specified pursuant to valid subcode information or temporary storage areas for frames having invalid subcode information. DMA circuitry transfers the frame data to the destination group memory locations. The processor further checks the error status of the stored frame data, verifies the group memory locations specified by the subcode information for frame data stored pursuant to valid subcode information, relocates frame data stored in temporary storage areas pursuant to frame location information contained in the frame headers under certain conditions, and updates a Bad Track Table to indicate the status of the received frame data stored in the group memory.

Method and apparatus for efficiently determining a frame motion vector in a video encoder

Abstract: A method of implementing a fast video encoder by approximating a frame motion vector is introduced. MPEG-2 encoding uses both field and frame vectors in the encoding process. To implement an encoder in an efficient manner, an approximated motion vector created from two field motion vectors is used. The frame motion vector may be determined using the two field motion vectors alone, or by using the two field motion vectors in conjunction with their respective absolute error values. By using the disclosed methods, a motion estimation part for generating frame motion vector is not necessary. Only two field motion estimation parts are required to determine the field motion vectors, the frame motion vector is then approximated using the two field motion vectors. The cost and complexity of a digital video encoder system is thereby reduced.

Method of multi-layer based scalable video encoding and decoding and apparatus for the same

Abstract: A method of multi-layer based scalable video encoding and decoding and an apparatus for the same are disclosed. The encoding method includes the steps of estimating motion between a base layer frame that is placed at a temporal location closest to a current frame of an enhancement layer, and a frame that is backwardly adjacent to the base layer frame to acquire a motion vector, generating a residual image by subtracting the backwardly adjacent frame from the base layer frame, generating a virtual forward reference frame using the motion vector, the residual image and the base layer frame, and generating a predicted frame with respect to the current frame using the virtual forward reference frame, and encoding the difference between the current frame and the predicted frame.

System, transmitter, receiver, method and software for transmitting and receiving ordered sets of video frames

Abstract: When distributing a set 101 of frames 102 each with encoded data 103 from a transmitter 104 to a receiver 105, a dependent frame 108 requires an independent frame 107 for decoding, and the transmitting 111 of the frames 102 from a buffer 110 at the transmitter 104 is reordered such that the dependent frame 108 is sent after the independent frame 107. In particular, a transmission policy wherein buffering 109 a further frame 125 takes into account both: if the further frame 125 requires zero, one or two frames 102 of the set 101 for decoding, and the current frames 102 buffered at the first and the second position 123 of the transmit buffer 110.