78results about "Compressed video signal" patented technology

There is disclosed a video memory manager for use in a video recording device that stores of video programs on a disk drive. The video memory manager comprises a video memory controller for detecting that the disk drive does not contain sufficient storage space to store a next-to-be-recorded program. The video memory controller, in response to the detection, determines a first retention score associated with a first video program and a second retention score associated with a second video program. The first and second retention scores indicate a desirability of retaining the first and second video programs respectively. The video memory controller deletes a least desirable one of the first and second video programs.

An information reproduction apparatus for performing special reproducing operations including fast forward and fast reverse operations on an audio-video material. The information reproducing apparatus is capable of reading and reproducing information having a plurality of clips wherein the size of the recording medium access unit or cluster is set at a common multiple of the size of the recording medium minimum accessible unit or sector and the size of the minimum process unit or decoding packet size in the information material reproducing apparatus.

In a recording medium on which is recorded a multiplexed stream (231) including a plurality of first packets (V_main) constituting a first I-picture in a first video stream and a plurality of second packets (V_sub) constituting a second I-picture in a second video stream, information for identifying the first I-picture and information for identifying the second I-picture are recorded on the medium. A recording medium can thereby be obtained that enables the rapid detection, from a small amount of information, of a particular picture included in a stream such as a TS in which multiple content streams are multiplexed.

A method and device for recording information signals on a partly recorded writable record carrier (11), e.g., an optical disc. An information signal represents at least one information unit. The record carrier has a recording track which includes pre-formed track position information indicative of locations for recording the information units. From the information signal, a modulated signal is generated having successive frames, each frame including a synchronizing signal. The modulated signal is recorded at a one of the locations, while maintaining a fixed relationship between the track position information and the synchronizing signals. In the event that the location is after and adjacent to an already recorded location, the recording is started at a link position (31) before the end of a last frame of the earlier recorded information signal, at a predefined distance before a first synchronizing signal (30) of the modulated signal.

There is disclosed a video memory manager for use in a video recording device that stores of video programs on a disk drive. The video memory manager comprises a video memory controller for detecting that the disk drive does not contain sufficient storage space to store a next-to-be-recorded program. The video memory controller, in response to the detection, determines a first retention score associated with a first video program and a second retention score associated with a second video program. The first and second retention scores indicate a desirability of retaining the first and second video programs respectively. The video memory controller deletes a least desirable one of the first and second video programs.

To provide an information reproduction apparatus which can consecutively reproduce a plurality of clips of an information material without the need for preparing resources of two channels and without using a special, dedicated encoder a write finish flag generator is provided which sets a write finish flag WF at a time point when writing of a cluster of a certain clip from a recording medium to an information material storage unit is finished in a case where at least part of the last cluster of the preceding clip is invalid data in reproducing the clip, preceding the clip, of an information material supplied from the information material storage unit.

It is disclosed a video processing method for generating a reverse video stream from an original video stream. Coded frames of the original video stream are buffered and decoded, whereby a reverse video stream is generated wherein the decoded frames are organized according to an order which is opposite to the display order of the original video stream. According to the method, a frame to be displayed is selected (602) between frames of the original video stream, selection of the frame being made based on the frames display order of the reverse video stream. The method further provides for checking (702-703) in a list of decoded frames if all reference frames of the original video stream necessary to decode the selected frame have already been decoded and the relative decoded frames are actually buffered. If all reference frames have been decoded and are actually buffered, then the selected frame is decoded. If not all reference frames have been decoded and are actually buffered, the method provides for decoding (706-707) all reference frames of the selected frame that are not in the list of decoded frames and buffering the relative decoded reference frames, wherein if no buffer memory is available for buffering one decoded frame, the buffer storing the oldest decoded frame not present in a list of frames to be displayed (1000) and not storing a reference frame for the selected frame is released and the decoded frame is buffered in the released buffer (901-912). Once the selected frame is decoded and buffered, a list of frames to be displayed is updated (604) with order information for outputting the decoded selected frame as a frame of the reverse video stream. A next video frame of the original video stream is selected (602), to be the next video frame of the reverse video stream, then the selection and decoding steps of the method are repeated for said next video stream.

An image capturing apparatus comprises an image capturing unit that includes an image sensor that has an effective pixel region and a reference pixel region which outputs a reference signal for correcting an output signal of the effective pixel region. In a case where a predetermined condition is satisfied, a reduction unit reduces a data amount of reference pixel region data that corresponds to the reference pixel region in an image data obtained by the image capturing unit. A recording unit records the image data after the processing performed by the reduction unit.

In a recording medium on which is recorded a multiplexed stream (231) including a plurality of first packets (V_main) constituting a first I-picture in a first video stream and a plurality of second packets (V_sub) constituting a second I-picture in a second video stream, information for identifying the first I-picture and information for identifying the second I-picture are recorded on the medium. A recording medium can thereby be obtained that enables the rapid detection, from a small amount of information, of a particular picture included in a stream such as a TS in which multiple content streams are multiplexed.

A system and method disposed to enable encoding, decoding and manipulation of digital video with substantially less processing load than would otherwise required. In particular, one disclosed method is directed to generating a compressed video data structure that is selectively decodable to a plurality of resolutions including the full resolution of the uncompressed stream. The desired number of data components and the content of the data components that make up the compressed video data, which determine the available video resolutions, are variable based upon the processing carried out and the resources available to decode and process the data components. During decoding, efficiency is substantially improved because only the data components necessary to generate a desired resolution are decoded. In variations, both temporal and spatial decoding are utilized to reduce frame rates, and hence, further reduce processor load. The system and method are particularly useful for real-time video editing applications.

A remote editing system has a main editing apparatus configured to transmit, to a remote editing apparatus via a network, hierarchically encoded data that forms an image, the hierarchically encoded data belonging to a predetermined hierarchical level. The remote editing apparatus is configured to accept an editing operation using the hierarchically encoded data transmitted by the main editing apparatus to edit content of the hierarchically encoded data. The remote editing apparatus is further configured to request the main editing apparatus to transmit another hierarchically encoded data, and to generate edited image data using the another hierarchically encoded data transmitted by the main editing apparatus in compliance with the request.

A data processing system is disclosed, including one or more processors, a memory, and a plurality of instructions stored in the memory and executable by the one or more processors. The instructions may be executed to convert an input video file to a commonly used video format, and compare a resultant file size to a threshold size. In response to the file size being greater than the threshold size, the instructions may be executed to reduce a video bit rate of the input video file, and produce a Portable Document Format file that includes contents of an input Portable Document File and in which the input video file is embedded.

The present invention provides an image data processing method of recording image data coded with the MPEG (Moving Picture Experts Group) technique to a recording medium. For transition of the bit occupancy in a VBV buffer to a target value, the initial value of a bit occupancy in a VBV buffer is calculated on the basis of auxiliary data read from a recording medium, a comparison is made between the target and initial values of the bit occupancy, and the number of bits for assignment to each GOP of to-be-coded image data correspondingly to the result of comparison.