81results 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.

A media playback component includes a demultiplexer for receiving a data stream and for demultiplexing media content items provided at a first demultiplexer output and at least one type of non-media content items provided at a second demultiplexer output. The media playback component includes playback queue, a queue input of which is connected to the first demultiplexer output. A bypass input of a queue bypass is connected to the second demultiplexer output. The media playback component includes a decoder including a first decoder input connected to a queue output of the playback queue and a second decoder input connected to a bypass output of the queue bypass. The decoder is configured for decoding the media content items in accordance with commands contained within the at least one type of non-media content items. Further embodiments relate to a method for (distributed) media playback, and to a server component for distributed playback architecture for media data.

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.

To hierarchically encode image data for compression purposes to ensure that a detailed remote editing operation can be performed with high efficiency by making the most of hierarchical encoding.A main editing machine (FIG. 2) transmits hierarchically encoded data for image formation to a remote editing machine in accordance with an employed network band and a remote editing machines capacity. At the remote editing machine, an editor performs edits by using the hierarchically encoded data. Editing information which is created as a result of editing, is transmitted from the remote editing machine to the main editing machine. The main editing machine transmits difference-representing hierarchically encoded data to the remote editing machine in accordance with the editing information. The remote editing machine generates edited image data by using previously received hierarchically encoded data and the difference-representing hierarchically encoded data transmitted from the main editing machine.Thanks to hierarchical encoding, the hierarchically encoded data can be minutely hierarchized for elements defining picture quality such as resolution and image quality.

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.

In various embodiments, an encoding optimization application encodes a source video sequence. The encoding optimization application partitions a source video sequence associated with a media title into multiple subsequences that include a first subsequence and a second subsequence. The encoding optimization application then generates a first encoded subsequence based on the first subsequence and a first resolution. The encoding optimization application generates a second encoded subsequence based on the second subsequence and a second resolution. Notably, the second resolution is higher than the first resolution. The encoding optimization application then aggregates the first encoded subsequence and the second encoded subsequence to generate an encoded video sequence. At least a portion of the encoded video sequence is subsequently streamed to an endpoint device during a playback of the media title.

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.

In various embodiments, an iterative encoding application encodes a source video sequence. The encoding optimization application generates a set of shot encode points based on a set of encoding points and a first shot sequence included in the source video sequence. Each shot encode point is associated with a different encoded shot sequence. The encoding optimization application performs convex hull operation(s) across the set of shot encode points to generate a first convex hull associated with the first shot sequence. Subsequently, the encoding optimization application generates encoded video sequences based on the first convex hull and a second convex hull associated with a second shot sequence included in the source video sequence. The encoding optimization application computes a new encoding point based on the encoded video sequences and a target value for a first video metric and then generates an optimized encoded video sequence based on the new encoding point.

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.

In various embodiments, an encoding optimization application positions key frames within encoded video sequences based on shot changes. The encoding optimization application determines key frame location(s) based on shot change(s) included in a source video sequence associated with a media title. Each key frame location is associated with a different frame included in the source video sequence. For each of the key frame location(s), the encoding optimization application configures an encoding application to encode a frame of video content located at the key frame location as a key frame when performing encoding operations. Subsequently, the encoding optimization application causes the encoding application to perform encoding operation(s) on the source video sequence to generate a first encoded video sequence. During playback, the media title is switchable between a decoded version of the first encoded video sequence and a decoded version of a second encoded video sequence at the key frame location(s).

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.

The invention discloses a multimedia file splicing method and apparatus. The method comprises: a first video clip and a second video clip that are going to be spliced are obtained; audio files corresponding to the first video clip and the second video clip are obtained, wherein the audio files record first starting and ending time of the first video clip and second starting and ending time of the second video clip; the first video clip is adjusted to be played within a first period of time indicated by the first starting and ending time and the second video clip is adjusted to be played with a second period of time indicated by the second starting and ending time, wherein the first period of time and the second period of time do not overlap with each other; and splicing operation is carried out on the adjusted first video clip and the adjusted second video clip to obtain a spliced video file. According to the invention, a technical problem of low synthesis precision during the audio and video splicing process in the prior art can be solved.

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.

The invention discloses a multimedia file editing method and device, electronic equipment and a storage medium, relates to the technical field of computer technologies and cloud computing, and furtherrelates to the field of media clouds. The method comprises the following steps: acquiring a multimedia file and operation information respectively corresponding to each editing track in a plurality of editing tracks, wherein the operation information is used for editing the multimedia file; under the condition that the multimedia files are edited according to the time sequence, performing detecting to obtain a multimedia file frame corresponding to each editing track at the current moment; editing the multimedia file frame corresponding to each editing track at the current moment by utilizingthe operation information corresponding to the multimedia file frame to obtain an edited file frame corresponding to each editing track at the current moment; and performing coding synthesis on the edited file frame corresponding to each editing track at the current moment. Coding synthesis is carried out on multimedia file frames in different editing tracks at the current moment, the coding synthesis granularity can be reduced to the granularity of the frames, and coding synthesis control is facilitated.

A video compressing apparatus and method that may increase the compression efficiency while maintaining the quality of video on an electronic device processing multimedia data including video are provided. The apparatus includes a video compressing apparatus and method that obtain a target image from a memory or camera, generate meta data corresponding to attribute information of the obtained target image, and compress the target image based on, at least, the generated meta data.

The invention discloses a video storage method and device, a video reading method and device and a video access system. The video storage method comprises following steps of collecting a video and generating cache region data, wherein the cache region data starts from an I frame or R frame of the video; storing the cache region data in the storage fragment of a storage region; and inserting the I frame having reference relationship with the first frame into a newly established storage fragment if the storage fragment is the newly established storage fragment and the first frame of the data of the cache region data needing to be stored in the storage fragment is the R frame. According to the scheme, in the storage process of the video data, the code stream of the video is prevented from being lost, and the code stream structure of GOP (Group of Pictures) codes is prevented from being changed. According to the video data stored by the method, cross storage fragment reference is avoided when the video is read, and rapid decoding is realized when random access is carried out.

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.

Embodiments of the application disclose a video decoding control method and device, and an electronic device. The method includes steps: when it is detected that multiple application programs operatein a split screen mode, detecting application programs in the video playing state in the multiple application programs; obtaining the detected application programs in the video playing state as to-be-configured application programs; and configuring videos played for decoding the to-be-configured application programs in a hard decoding mode. According to the method, when the multiple application programs are in the split screen display mode and several application programs in the multiple application programs have the video playing function, and the videos played for decoding the application programs in the video playing state in the hard decoding mode are configured so that the load rate of a CPU is reduced, the CPU has more processing capabilities to deal with other tasks, the probabilityof lagging of the electronic device is reduced, and the user experience is enhanced.

In a video processing apparatus, an input processing unit inputs a video frame, a first video processing unit performs image processing on the input video frame, and an output processing unit outputs the image processed video frame to display it. Further, a control unit in the video processing apparatus controls the image processing so that a video frame subjected to freeze display in response to an input of a pause instruction to the video processing apparatus is displayed in the high image quality.

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.

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.

A recording apparatus processes a stream of compressed video data to produce a recording signal which includes periodically occurring blocks of low-frequency video component data, for use in subsequent variable-speed playback operation. The processing is executed by selecting specific elements of low-frequency video components from the compressed video data, applying time-axis compression to the low-frequency video component elements to obtain successive data blocks, and to the compressed video data to obtain successive data blocks, between which the blocks of low-frequency video component elements are inserted.

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.

Systems, devices and methods are provided for video storage. For example, video data is acquired for generating buffer zone data, the buffer zone data beginning with an I frame or an R frame of the video. At least part of the buffer zone data is stored to a storage fragment in a storage area. In response to the storage fragment being newly opened and a first frame of the at least part of the buffer zone data being an R Frame, an I Frame with reference relation to the first frame is inserted to the storage fragment, the R Frame corresponding to a picture frame referring to the I Frame.

An imaging apparatus that records, on a recording medium, a moving image captured using a solid-state imaging device as stream data, is disclosed. The apparatus includes: an image encoding section that encodes data of the captured moving image with a unit of an image group being a sequence of images of a fixed number of frames; an input detection section that detects a recording stop request to stop recording of the stream data including the moving image data being an encoding result of the image encoding section onto the recording medium; and a recording control section that controls a recording operation of the stream data onto the recording medium such that, when the recording stop request is detected by the input detection section, the image group located immediately before the image group including an image captured at the time of detection is the last image group.

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 occupany 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 intial values of the bit occupany, and the number of bits for assignment to each GOP of to-be-coded image data correspondingly to the result of comparison.

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.

A method for playing media data is disclosed, including: transmitting, by a first operating system, a request for processing the media data to a second operating system, the first operating system and the second operating system being installed on a same device; receiving, by the first operating system, processing results from the second operating system, wherein the second operating system is configured to process the media data based at least in part on the request to generate the processing results; and playing the media data by the first operating system based at least in part on the processing results.