75 results about "Video coding format" patented technology

The invention provides a streaming media information processing method, a streaming media information processing system and a server. The method comprises the following steps of: receiving a streaming media service request sent by a terminal, wherein the streaming media service request comprises a terminal type of the terminal, an audio/video coding format supported by the terminal and resolution information; according to the terminal type, the audio/video coding format and the resolution information, acquiring corresponding streaming media information; and sending the streaming media information to the terminal so as to provide a streaming media service to the terminal. According to the streaming media information processing method, the streaming media information processing system and the server which are disclosed by the invention, the problem that different streaming media distribution platforms are required in the prior art is solved; and by regulating a streaming media information output format, under the condition that the terminal is not greatly modified, the unified distribution of the streaming media information is realized, network resources are sufficiently utilized, the cost of establishing a streaming media information system is saved, and the streaming media information processing method, the streaming media information processing system and the server adapt to the development need of the streaming media service in the future.

A video transcoding method comprises decoding a first bit stream encoded by a first video encoding format to obtain decoded video data and side information, converting the decoded video data and side information into a form suitable for a second video encoding format to obtain converted video data and converted side information, and encoding the converted video data using motion vectors contained in the side information to obtain a second bit stream of the second video encoding format.

A method of generating data representing a degree of importance of data blocks in a coded digital image of a digital video sequence coded in a hybrid predictive video coding format, said image being divided into a plurality of data blocks comprises, for the data blocks of the image, a step of determination of data representing the degree of importance of each of those data blocks on the basis of the coding or absence of coding of said data block, the determination also depending on the possible use of the data block considered for the coding of at least one data block of at least one other image of the video sequence. The invention also relates to a method of transmitting a coded video sequence.

The invention provides a method for carrying out audio/video redirection in a VDI (Virtual Device Interface) environment, which comprises the following steps that: a user logs in a virtual desktop by a client and carries out video playing operation; after a data source and a separator are established, a server side preferentially matches and uploads a redirector; when starting to play a video, the redirector carries out selective processing on video data; if a coded format is an original video coded format, the data is fed into a data compressor and the data is compressed into a media format which can be decoded by the client; if the coded format is a decodable format supported by the client, the data is transmitted to a client communication module by a server side communication module; if the coded format is not one of the two coded formats, the data is rejected to receive, a server side decoder is uploaded and the data is subjected to decompression processing; and a client play assembly displays and plays a played image on the virtual desktop. According to the method provided by the invention, an audio/video redirection technology is more universal for supporting the multimedia coded format and the play fluency of the standard/high definition video with the definition of at least 720P is promoted.

The invention provides a video steganalysis method based on partial cost non-optimal statistics. A fundamental principle of producing a motion vector is deeply excavated in the steganalysis method. The video steganalysis method based on the partial cost non-optimal statistics starts from the local optimum characteristics which should be kept and produced by the motion vector, and thereby the steganalysis method is enabled not to be limited to a particular video coding standard and a coding tool, is applicable to video encoding formats adopting interframe prediction technology such as moving picture expert group (MPEG)-2, MPEG-4 and H.264 and has good and wide generality and a high detection accurate rate. The video steganalysis method based on the partial cost non-optimal statistics can be applied to national security, army, government and enterprise sectors, achieves effective detection and monitoring of video content security, prevents illegal personnel from transferring intelligence information with a large data amount through video data and has important research significance and application values for ensuring the national intelligence safety, preventing enterprise confidential information from being revealed and the like.

The invention discloses a no-reference video quality evaluation method and device. The method comprises the steps as follows: analyzing and acquiring an encoding format, an encoding rate and a resolution ratio of a video; acquiring video source data; acquiring OPSNR (optical signal noise ratio) after encoding is finished; searching a loss rate list of code rates of the encoding format according to the acquired video encoding format so as to obtain a corresponding code-rate loss rate; computing a dynamic video weighting factor; performing code rate conversion to obtain a dynamic weighting code rate; substituting a converted code rate and the video resolution ratio into a video quality evaluation score list to obtain a dynamic video benchmark score through searching; acquiring a fuzzy coefficient by means of the video source data, and acquiring a video ambiguity benchmark score; and acquiring a final score through weighting addition of the dynamic video benchmark score and the video ambiguity benchmark score. The quality evaluation device can be simply and conveniently accessed to a universal video encoding and decoding structure system, the computation amount is small, and original video information is not required to be used as reference, so that a higher engineering application value is achieved.

A video transmission method is used with a video data providing device, a first video management device and a second video management device. Firstly, a video coding format supportable by the first video management device is retrieved by the video data providing device. Then, a video image is converted into video data by the video data providing device according to the video coding format, and the video data are transmitted to the second video management device. Afterwards, the video data are transmitted from the second video management device to the first video management device, and the video data are decoded by the first video management device according to the video coding format so as to acquire the video image.

The invention discloses a method and system for realizing H264 video coding format play optimization at a cell phone platform. The method comprises the following steps: a cell phone client transmits a real-time streaming media protocol (RTSP) request to request a video stream on the server; the server encodes according to H264 coding format, and transmits a real-time transmit protocol (RTP) data packet in a mode of user data protocol (UDP); the client receives the RTP data packet, resolves the RTP data packet into naked code stream data and decodes the naked code stream; and the decoded stream data is outputted and displayed in videos. According to the invention, the receiving, resolving, decoding and display processes of a cell phone terminal are optimized, so that H264 format file play is improved in speed and quality.

The invention discloses a system for supporting self-adaption of decoding audio and video and a method thereof. The system comprises a strategy configurator, playing frame equipment, a memory device and a module manager, wherein the strategy configurator is used for determining the processing strategy adopted by the module manager according to the configured information by a user; the playing frame equipment is used for storing a dynamic binding protocol of supporting playing of various formats of audio-video files; the memory device is used for storing modules for processing audio-video files with different formats; and the module manager is used for carrying out loading and unloading management on the modules in the memory device according to the processing strategy and calling the dynamic binding protocol corresponding to the format into the memory device from the playing frame equipment according to the format of the audio-video files to be processed and carrying out decoding on the audio-video files after carrying out binding with the modules with corresponding formats in the memory device. The invention solves the problem that the audio-video player of the mobile terminal restricts the audio-video file formats and audio-video coding formats.

The invention discloses a network video streaming media system, a transmission processing method, a transmitting end and a receiving end. The method comprises the following steps that: the transmitting end determines the priority of a data packet according to the type of a video frame in the data packet of network video streaming media, and transmits higher-priority data packet of the network video streaming media preferentially; the receiving end resorts the received data packet of the network video streaming media so as to recover an original sequence of the data packet of the network video streaming media; and the receiving end plays the data packet of the network video streaming media, of which the sequence is reduced. In the network video streaming media system and the network video streaming media method, encoding characteristics based on a network video streaming media video coding format and transmission characteristics are optimized; on one hand, the condition that a client playing effect is sharply deteriorated and cannot be improved in a long time in case of insufficient data is effectively avoided; and on the other hand, a condition that a player frequently repeats buffering waiting time in a scheme of simultaneously compressing multi-rate data in the process of switching between different code rates is avoided.

A multi-format 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 memory module that stores format configuration data corresponding to a plurality of video coding formats. A plurality of vector processor units generate a decoded video signal from the EDC data, wherein at least one of the plurality of vector processors include a vector function module that generates vector function data based on a vector function of a first input vector and a second input vector. A selection module selects each element of a vector output as one of: a corresponding element of the vector function data, and a corresponding element of a third input vector.

The invention relates to a device and a method for detecting a video coding format of video and audio media files. The device comprises a detecting task acquisition unit connected with a file opening unit, the file opening unit is connected with a video and audio basic parameter detecting unit and an information output unit, the video and audio basic parameter detecting unit is connected with an Mpeg-2 (moving picture experts group-2) basic flow detecting unit and the information output unit, and the Mpeg-2 basic flow detecting unit is connected with the information output unit. By the method and the device, the video and audio media files to be detected can be subjected to grammar or semantic layering detection defined in each layered structure of Mpeg-2 video streaming, and detection is sequentially performed from a top layer, a sequence header, a picture group layer, a picture layer, a Slice layer and a macro block layer; and the execution state and the execution progress of coding format compliance detection can be visually obtained, and error level and output error information are displayed after the coding format compliance detection is completed. Besides, broadcasting accidents due to the fact that the video and audio media files cannot be decoded by a video server can be avoided, and safety of broadcasting is guaranteed.

The invention provides a method for carrying out a video session, a video session system and set top boxes (STBs). The method comprises the following steps: a microprogrammed control unit (MCU) negotiates the capabilities of the STBs for the video session and keeps the IP address sets of the STBs for the video session and the correspondence between each IP address in the IP address sets and the video format of the corresponding STB; the STBs at the transmitting end acquire the video data from a camera and transmit the video data to the MCU; the MCU finds out the video format of the STB corresponding to the IP address of each STB at the transmitting end in the correspondence, converts the video data transmitted by the STBs at the transmitting end into the video coded formats corresponding to the found video formats of the STBs and then sends the video data to the corresponding STBs at the transmitting end; and the STBs at the transmitting end receive the video data and transmit the video data to a TV to be played after carrying out corresponding decoding on the video data. The cost of the video session can be lowered by adopting the scheme in the invention.

The invention provides a video transmission method and device, electronic equipment and a storage medium, and the method comprises the steps: recoding of a real-time code stream obtained from a video-on-demand monitoring camera according to a first video coding format supported by a web client after video-on-demand information of a web client is received, so as to obtain a target code stream; and sending the target code stream to a web client through a WebSocket protocol, so that the web client analyzes the target code stream and plays the analyzed target code stream through a hypertext markup language (HTML) 5. Therefore, the web client does not need to install a plug-in corresponding to the video-on-demand monitoring camera, and the real-time video picture collected by the monitoring camera can be played on the web client.

The invention discloses a method for improving the service efficiency of a wireless multimedia bandwidth. The method comprises the following steps: a multimedia broadcasting device sends a request to a mobile terminal to acquire display screen parameters and video code format of the mobile terminal; the multimedia broadcasting device calls the acquired display screen parameters and video code format and optimizes the video data to be transmitted according to the display screen parameters and the video code format; and the multimedia broadcasting device determines a code stream rate according to the display screen parameters and the video code format and transmits the optimized video data to the mobile terminal according to the set code stream rate. The multimedia broadcasting device communicates with the mobile terminal at the set code stream rate, thereby avoiding bandwidth waste and bandwidth deficiency, and improving the service efficiency of the wireless multimedia bandwidth.

The invention comprises an audio and video coding format converting board and a switch controlling board, both are connected through a data bus. The audio and video coding format converting board comprises a network processor and an audio and video coding format converting processor, both are connected through a two-way data bus and several control lines; the switch controlling board comprises a Ethernet switching module and a network administration processor, both are connected through a MII/GMII interface. The invention can automatically converts the network-inputted audio and video data in stream media format into the audio and video format defined by AVS, and the send audio and video data in stream media format to a destination address, and can also sends the converted single-way source stream media data to the client side of network monitor by multicast way according to the administration signaling.

The invention relates to a system and a method for realizing cloud transcoding on various code rates and encoding formats of audio and video contents. The system comprises a cloud publishing subsystem for displaying an audio and video publishing interface, a cloud storage subsystem for storing transcoded files, and a cloud transcoding subsystem which comprises a transcoding factor library, a transcoding preprocessing module and transcoding modules, wherein the transcoding preprocessing module is used for analyzing formats of audio and video files selected during cloud publishing, decoding the audio and video files and calling corresponding transcoding function units from the transcoding factor library to form the corresponding transcoding modules. According to the system and the method for realizing the cloud transcoding on various code rates and the encoding formats of the audio and video contents, by the adoption of the structure, the transcoding modules can be assembled according to a transcoding requirement selected during the cloud publishing; each transcoding module has different functions; a large-scale transcoding demand is met, and various audio and video encoding formats and files with various code rates can be generated; the transcoding speed is greatly increased, the transcoding rate is improved, and a large application range is realized.

The invention relates to a video code stream processing method and device. The method comprises: obtaining multipath original video code streams to be merged, the multipath original video code streams employing a same video coding format and possessing same code stream configuration parameters; obtaining code stream configuration parameters which are not changed in merging the multipath original video code streams, and writing changed code stream configuration parameters into a merged video code stream; copying the code stream configuration parameters which are not changed in merging the multipath original video code streams to the merged video code stream; and sequentially copying the coded data of each path of the original video code streams to a coded data container in the merged video code stream corresponding to each path of the original video code streams. The video code stream processing method and device greatly increase a video code stream merging efficiency, and can avoid video quality loss caused by video code streams in a decoding and coding process.

A method, a coding format and a device is provided for switching from a first data channel to a second data channel of a digital television system. At least the second data channel is coded in a multilayer scalable video coding format comprising a base layer and at least one enhancement layer. The multilayer coding is used for switching between channels, and at least one of the enhancement layers may be adapted for providing fast switching by providing it with more random access points, e.g. more IDR-frames, than the base layer.

The invention discloses a method for converting a video format, comprising the following steps of: generating a filter chart; reading in a configuration file corresponding to the filter chart; adding filter assemblies into the filter chart according to the configuration file; connecting the filter assemblies in the filter chart in sequence; setting the parameters for the filter assemblies in the filter chart according to the configuration file; and carrying out conversion on the packaging format of the video file and a video coding format. According to the technical scheme disclosed by the invention, the filter chart can be quickly and flexibly constructed, the filter assemblies are selected in the mode of revising the configuration file, and various collocations are adaptive to different video formats; the video format is simply efficiently converted without revising a source code and enumerating the filter assemblies; the parameters are set by using the configuration file, which is clear and easy to know and is favorable for reusing and revising.

A method and an encoder for encoding a video stream in a video coding format supporting auxiliary frames, where such auxiliary frames, in conjunction with the frames that reference the auxiliary frames, can be used to for rate control, in that the image data of the auxiliary frames comprises a down scaled version of an image data captured by a video capturing device, and that motion vectors of the frame referring to the auxiliary frame are calculated/determined to scale up the down scaled version of the image data to again have the intended resolution.

The present disclosure discloses method, apparatus, and a terminal for playing multimedia content, and relates to the field of computer technologies. The method includes: identifying a video encoding format, an audio encoding format, and a file format of a multimedia file; detecting whether the video encoding format can be processed by a graphics processing unit; when the video encoding format cannot be processed by the GPU, playing the multimedia file by using an application program that can process the video encoding format through a central processing unit; when at least one of the audio encoding format and the file format cannot be processed by the GPU, transcoding the multimedia file from the at least one format into a corresponding format that can be processed by the GPU; and sending the transcoded multimedia file to the GPU, so that the GPU plays the multimedia file.

The invention discloses a video information live transmission, storing and deacidizing method in the internet, which is characterized by the following: the video information is catched and digitalized by the video trap; the screen video information is catched by screen trap; two pathes of datas are sent to agitator and carried out normalization treatment; the calculation result is coded; the accumulator saves the coded message according to the standard video flow media file layout; the coded message is transdered in network by transceiver; the transceiver provides transmitting-receiving media information in network; the received video flow data is delivered to the video restorer and deacidized according to the video code format; the deacidized data is presented on the persent device.

The invention discloses a large-screen management subsystem and a large-screen synchronous playing system and method.The large-screen synchronous playing system comprises the large-screen management subsystem, a code coding and transcoding subsystem, an information source, large-screen equipment and a mobile playing terminal.The code coding and transcoding subsystem creates one or more code coding and transcoding tasks for the content of each playing list, and the code coding and transcoding subsystem creates one or more code coding and transcoding tasks; the quantity of the tasks is the same as the output quantity required by the playlist item; the file packaging format, the audio and video coding format, the network protocol format and the network output address output by each coding and transcoding task all come from the requirements of the broadcast list item.