46 results about "Mpeg standards" patented technology

An optical disc that is reproducible by a reproducing apparatus has a still picture data and an audio data which are reproduced simultaneously. The still picture data is stored in a video part stream (ST1) comprising a plurality of units, and the audio data is stored in a second system stream (ST2) comprising one or a plurality of units. The units store time stamp information so that the second system stream (ST2) follows immediately after the video part stream (ST1). By changing the data in the second system stream (ST2), the audio data presented with a still picture can be freely and easily changed even after recording the still picture data using an MPEG standard format.

A method and apparatus of encoding digital video, for example according to the ISO/IEC MPEG standards (ISO/IEC 11172-2 MPEG-1 and ISO/IEC 13818-2 MPEG-2), which employs a local motion estimator for determining respective local motion vectors for groups of adjacent macroblocks in a picture. A local motion vector is determined for each row of macroblocks in a picture from the motion vectors of the macroblocks in that row. Then, for macroblocks in the corresponding row of a subsequently coded picture, the local motion vector can be used to select the search window used for determining the motion vectors. The local motion estimator improves search range and accuracy of macroblock motion vector detection without increasing the search window accessing bandwidth and caching requirement, and computation lode of searching.

A digital recording and playback apparatus adopting an MPEG encoder and decoder, and a method thereof. The digital recording and playback apparatus includes: a first encoder for coding input video data in picture units, and outputting coded video data; a second encoder for coding input audio data and outputting coded audio data; a packetized elementary stream (PES) packetizer for packetizing the coded video data and audio data and user data into each PES, and outputting a video PES, audio PES and user PES; and a transport stream (TS) packetizer for multiplexing the video PES, audio PES and user PES into a TS. The digital recording and playback apparatus can be compatible with a digital television or multimedia applications adopting the MPEG standard, and can perform editing in picture units as well as high-speed search.

A method and apparatus of encoding digital video according to the ISO/IEC MPEG standards (ISO/IEC 11172-2 MPEG-1 and ISO/IEC 13818-2 MPEG-2) using an adaptive motion estimator. A plurality of global motion vectors are derived from the motion vectors of a previous picture in a sequence, and the global motion vectors are analyzed to determine motion characteristics. The video encoding is arranged to enable switching among different types of local motion estimators based on the motion characteristics of the moving pictures sequence. This gives rise to a motion estimation algorithm that can adaptively change its search range, search area and block matching scheme to suit different types of moving sequences.

A wireless receiver for receiving a multi-contents file and a method for outputting data using the same, which can receive, navigation information for providing intuitively recognizable search interfaces to a user by radio in real time, receive various types of contents files by radio in real time, and output the received information and files through an AV device. A video decoder decodes a video stream on the basis of an MPEG standard. An audio decoder decodes an audio contents file. An OSD processor processes a text file and additional information. A video output unit selectively configures decoded video data and text data on one screen and performs encoding and outputting operations based on the format of a display unit. An audio output unit outputs decoded audio data. A user interface receives a user's command. A WLAN card communicates WLAN data with a computer system. A controller requests the computer system to transmit navigation screen information, at least one contents file or additional information of the contents file edited and processed by the computer system, analyzes a data stream received by radio from the computer system responsive to the request, and performs a control operation so that a result of the analysis is inputted into the decoder or OSD processor. A memory stores the stream and control program data.

The invention described herein provides a video analysis tool to assist a computer programmer working on a program that effects video data. The tool may be integrated with program code. When enacted, the tool obtains statistical information related to the video data and information corresponding to functions of the code. The code may be responsible for encoding, transcoding, and/or decoding video data, for example. The tool is integrated with a video decoder to allow the information to be output with raw video data. The present invention is particularly useful for developing, debugging and analyzing programs responsible for encoding, transcoding, and/or decoding video data, such as video data compressed according to an MPEG standard.

A method of decoding MPEG coded digital data, received in a forward reproduction order in least one Group Of Pictures (GOP) according to the MPEG standard, for producing decoded pictures for display in reverse playback order. Tho this purpose a limited number of decoded frames is temporarily stored while repeatedly same coded picture data is retrieved in a forward reproduction order to produce decoded picture data, employing the decoded temporarily stored picture data. This has as an advantage that the amount of temporarily storage capacity required, approximately equals the amount required for forward playback. In a specific embodiment, wherein the MPEG data cotains either NTSC GOPs or PAL GOPs, only temporarily storage capacity of four picture frames is required in case of reverse playback, compared with three in case of forward playback.

A process for decoding and for displaying in rewind mode pictures of a stream of picture data compressed according to the MPEG standard using a specified number N of frame memories each adapted for storing a decoded picture, where N is an integer greater than or equal to 4, applies rules for selecting a frame memory when a frame memory is to be overwritten so as to allow the storage of a new picture to be decoded.

A system and method that prevent an input of variable length codes in which short length codes continue from being interrupted without an increase of a circuit scale are provided. The system comprises a variable length decoding device for decoding variable length codes, a buffer for buffering the variable length codes to be supplied to the variable length decoding device, a detector for detecting whether or not a occupation rate of the variable length codes in the buffer has increased, and a discarder for discarding the variable length codes to be supplied to the buffer when the detected result by the detector represents that the occupation rate of the variable length codes in the buffer has increased. The system further comprises an elementary stream extractor, disposed between the discarding device and the buffer, for extracting an elementary stream defined in MPEG standard.

Methods and apparatus for the secure and copy-proof distribution of digital content are disclosed. In a preferred embodiment of the invention cryptographic primitives (encryption algorithms, message-authentication codes, hash functions, random-number generators, etc.) are used in a novel security protocol. The invention may be utilized to protect a first-run movie that has been digitized in accordance with one of the current or forthcoming MPEG standards (e.g., MPEG-7). Content receivers or users first register their boxes. This registration information is stored in a secure database. When a subscriber registers, he then receives a box (interface to his player) that has been initialized to contain a number of tamper-proof secrets that are shared between the station and that particular box. The station stores an encrypted version of the digital content. This encrypted version ultimately arrives at some unprotected storage medium local to the player. Upon demand, the station delivers to the box the use-once computational ability to decrypt the content and display it on the player or terminal.

The present invention relates to a method for asynchronous multimedia content retrieval, which can be applied to TV-Anytime standard or MPEG standard. In summary, an asynchronous multimedia retrieval method is provided as including: a client establishing the first session as requesting to the server; transmitting to the server the retrieval inquiry message for contents that the server needs; terminating the first session after the retrieval inquiry; establishing the second session and requesting to the server the result for the retrieval inquiry at a certain point in time that the previously set time has passed; and receiving the retrieval result from the server and terminating the second session.

A coding / decoding device with watermark encipherment is prepared as forming coding device by watermark generator for generating watermark information and coder for carrying out coding according to MPEG standard and for embedding said watermark on, forming decoding device by decoder for analyzing MPEG code stream to pick watermark up and for restructuring decoded image and watermark detector used for judging whether code stream is distorted or not.

This invention discloses a digital video image frame-reduction storage method including the following steps: On the basis of compatible known MPEG standard, MPEG standard is applied to encode digital video images to form a basic MPEG video flow, then to reduce frames to every GDP set of said flow and store the frame-reduced MPEG digital video image in a video flow-like document. Advantage: when storing MPEG video images, it can store and display high quality of MPEG images in the limited space of hard disks and at low process speed of microprocessors by reducing or eliminating P, B or partial B frames of each GOP set.

The invention discloses a method, a system and a device for displaying a static image in a digital TV. The method comprises the steps of: receiving an I frame, and generating a video sequence which is in accordance with a moving picture experts group (MPEG) standard by referring to the I frame; and then, transmitting the generated video sequence to an MPEG hardware decoder for decoding. In the embodiment of the invention, a P frame and a B frame are generated by referring to the I frame, so that the video sequence which is in accordance with the MPEG standard can be generated and then transmitted to the MPEG hardware decoder for decoding, and decoded image is not processed by a CPU; an therefore, the invention saves resource of the CPU, and improves the decoding efficiency.

The invention discloses a scrambled/descrambled-data-scattering-based video scrambling system. The system inputs a scrambled transport stream (TS) code stream meeting a moving picture experts group (MPEG) standard, outputs a scrambled/descrambled-data-scattering-processing-based scrambled TS code stream meeting the MPEG standard, and comprises a conditional access (CA) descrambler, a scrambled/descrambled stream synchronous processing module, a first MPEG system layer de-multiplexing module, a second MPEG system layer de-multiplexing module, a video data transcoding processing module, an audio data transcoding processing module and a scrambled/descrambled-data-packet-scattering-based MPEG system layer de-multiplexing module. The system can finish the secondary processing of a descrambled code stream without constructing a conditional access system (CAS) again, solves problems in the application of multimedia systems such as digital television systems and the like, reduces system cost,and improves the international primacy of China in the technical field; and audio/video data processed by the system meets different coding standards, wherein the standards for videos at least comprise MPEG-2, MPEG-4, H.264/advanced video coding (AVC), H.264 scalable video coding (SVC), H.264 multi-view video coding (MVC) and an audio video standard (AVS); and the standards for audios at least comprise MPEG-2, advanced audio coding (AAC), doblyAC-3 and the like.