121 results about "Multiple description" patented technology

A peer-to-peer novel video streaming scheme is described in which each peer stores and streams videos to the requesting client peers. Each video is encoded into multiple descriptions and each description is placed on a different node. If a serving peer disconnects in the middle of a streaming session, the system searches for a replacement peer that stores the same video description and has sufficient uplink bandwidth. Employing multiple description coding in a peer-to-peer based network improves the robustness of the distributed streaming content in the event a serving peer is lost. Video quality can be maintained in the presence of server peers being lost. The video codec design and network policies have a significant effect on the streamed video quality. The system performance generally improves as the number of descriptions M for the video increases, which implies that a higher video quality can be obtained with the same network loading.

The method is directed to encoding / decoding a video signal sequence by generating therefrom multiple description subsequences wherein the subsequences are produced by a plurality of parallel video encoding processes based on respective encoding parameters. The method includes the step of commonly controlling the encoding / decoding parameters for the plurality of video encoding / decoding processes.

A method for assigning servers to provide multiple description bitstreams to a mobile client (in a mobile client environment) or to a fixed client (in a fixed client environment). In one embodiment, the present invention, upon receiving a request from a mobile client to have media data streamed thereto, analyzes a plurality of servers to determine a first candidate server for providing a first multiple description bitstream to the base station along a first path. The present method also determines a second candidate server for providing a second multiple description bitstream to the base station along a second path. The present method then sends a request to the first candidate server to provide the first multiple description bitstream to a mobile client through a base station along the first path, and also sends a request to the second candidate server to provide the second multiple description bitstream to the mobile client through the same base station along a second path. In another embodiment, there are two separate paths from two separate servers to two separate base stations and then from each base station there is a separate path to the mobile client. In still another embodiment, there are two paths from a single server to two separate base stations and then from each base station there is a separate path to the mobile client. In one fixed client embodiment, the present invention is able to assign a plurality of servers to provide a plurality of MD bitstreams to the fixed client.

A system and method for conveying supplemental enhancement information related to different pictures in one access unit. Different pictures in one access unit may be pictures of each layer of a scalable video, pictures of each view of a multiview video, or pictures of each description in a multiple description coding (MDC) video. An indication is included in the coded bitstream indicating the pictures with which the supplemental enhancement information message is associated. During a subsequent decoding process, the device performing the decoding recognizes this information and uses it appropriately.

A peer-to-peer novel video streaming scheme is described in which each peer stores and streams videos to the requesting client peers. Each video is encoded into multiple descriptions and each description is placed on a different node. If a serving peer disconnects in the middle of a streaming session, the system searches for a replacement peer that stores the same video description and has sufficient uplink bandwidth. Employing multiple description coding in a peer-to-peer based network improves the robustness of the distributed streaming content in the event a serving peer is lost. Video quality can be maintained in the presence of server peers being lost. The video codec design and network policies have a significant effect on the streamed video quality. The system performance generally improves as the number of descriptions M for the video increases, which implies that a higher video quality can be obtained with the same network loading.

An embodiment of the present invention provides a wireless telephone including a receiver module, a channel decoder, a speech decoder, and a speaker. The receiver module receives a plurality of versions of a voice signal, wherein each version of the voice signal comprises a plurality of speech frames. The channel decoder is configured to decode a speech parameter associated with a first speech frame from a first version of the voice signal, wherein decoding the speech parameter includes selecting an optimal bit sequence from a plurality of candidate bit sequences and wherein the selection of the optimal bit sequence is based in part on a second speech frame from a second version of the voice signal. The speech decoder decodes at least one of the first or second versions of the voice signal based on the speech parameter to generate an output signal. The speaker receives the output signal and produces a sound pressure wave corresponding thereto.

Some embodiments of the invention include tools for extracting data of interest from the World Wide Web (WWW) using descriptions of data of interest. The descriptions of data of interest can include computer programs comprising a sequence of instructions and extractor patterns. The extractor patterns can be developed interactively using a web browser integrated into the graphical development environment for creating the descriptions. The instructions can be selected from a predetermined list of instructions designed for extracting information from the WWW. The descriptions of data of interest can be grouped into categories sharing common query elements. Multiple descriptions in the same category can be executed simultaneously using the same query. The descriptions can be accessed by a client computer using a web browser to initiate a query. In some embodiments, the descriptions of data of interest are used to provide information about products available for sale over the WWW.

The invention relates to a method for seamless switch of mobile flow media transmission in the wireless mobile network, which uses multiple-path adaptive transmission speed regulation to realize the seamless switch of transmission layer, as dynamically regulating the layered multiple description video code strategy of flow media, according to the property of each path of multiple-path wireless access parallel transmission, to distribute the multiply-path transmission video code flow, and utilize the available band width of receiver most, to realize the stable transmission and smooth switch of transmission layer of mobile flow media. The invention can improve the band width, the transmission reliability, and reduce the network switch delay and the loss rate, to avoid the vibration which will affect the video quality of flow media. The invention can fully utilize present wireless network resource, with simple operation.

The method for encoding and / or decoding video signals, includes the operations of generating at a transmitter side a multiple descriptions vector associated to a pixel values vector of the video signals and decoding at a receiver side available descriptions vector for reconstructing the pixel values vector. The operation of generating a multiple descriptions vector includes the steps of obtaining the pixel values vector by selecting a group of pixels in a picture of the video signal and applying an encoding matrix to the pixel values vector. The decoding operation includes the step of applying a decoding matrix that is in an inverse relationship with the encoding matrix to the available descriptions vector to obtain the pixel values vector.

A distributed incentive mechanism is provided for peer-to-peer (P2P) streaming networks, such as mesh-pull P2P live streaming networks. Video (or audio) may be encoded into multiple sub-streams such as layered coding and multiple description coding. The system is heterogeneous with peers having different uplink bandwidths. Peers that upload more data (to a peer) receive more substreams (from that peer) and consequently better video quality. Unlike previous approaches in which each peer receives the same video quality no matter how much bandwidth it contributes to the system, differentiated video quality, commensurate with a peer's contribution to other peers, is provided, thereby discouraging free-riders.

A method for encoding video signals subjects the signals to unbalanced multiple description coding. The unbalanced multiple description coding codes a video signal in a first high resolution packet and a second low resolution packet and represents, respectively a first high resolution description and a second low resolution description. The unbalanced multiple description coding step includes using different intra refresh periods for the first and second high resolution descriptions, with an intra refresh period for the second low resolution description shorter than the intra refresh period of the first high resolution description.

Digital signals, such as image / video signals are converted between a first format and a second format by using Multiple Description Coding, whereby the second format conveys multiple descriptions (D1 to D4; D1′ to D4′) of the digital signals. In combination with MD coding, the signals are jointly subject to an error concealment process. Preferably, the error concealment process takes place in converting said digital signals from the second format conveying multiple descriptions to the first format

A data sequence may be encoded in a plurality of layers of multiple description coding. The layers of multiple description coding may include a first and a second layer of multiple description coding. The first layer of multiple description coding may include an initial part of a data sequence as well as forward error correction code for the initial part. The second layer of multiple description coding may include a next part of the data sequence as well as forward error correction code for the next part. A first set of data sequence breakpoints may be determined for the first layer of multiple description coding. A second set of data sequence breakpoints may be determined for the second layer. The data sequence may be encoded in the plurality of layers of multiple description coding as a function of the first and second sets of data sequence breakpoints.

The interfacing of coded media data packets in the transfer from and to a peer-to-peer network envisages that the data packets are included in groups of packets that may have lengths different from one another. Each group of data packets is encapsulated in a group of chunks of given length. The media data is made available in the network as a multiplicity of different descriptions of a multiple-description coding of one and the same media content. The terminals of the peer-to-peer network are configured for accessing selectively the multiplicity of different descriptions of said media contents, combining them with one another, or else accessing one of the different descriptions in substitution for another preserving access to the media contents. The data may be made available as base layer and at least one enhancement layer of one and the same media content.

The embodiment of the invention discloses an audio encoding method, an audio decoding method, a related device and a communication system. The audio encoding method comprises the steps of receiving packet loss rate fed back by an audio decoder according to acquired code streams, switching encoding capacity to a multiple description state corresponding to the packet loss rate according to the packet loss rate fed back and encoding audio data by the multiple description state. The audio decoding method comprises the steps of acquiring multiple description packets sent by the audio encoder, increasing the value of a counter of the multiple description packet which contains multiple description quantity and packet description number by 1, acquiring the numerical value of the packet loss packet, and calling packet loss concealment when determining the numerical value of the counter of the multiple description packet or when the packet description number is not smaller than the multiple description quantity and the numerical number of the packet loss counter is not smaller than the multiple description quantity. The embodiment of the invention adjusts the packet loss resisting capacity of encoding code streams according to actual condition and reduces bandwidth occupied by invalid redundant information, thereby acquiring better output code stream quality.

A system and method for signaling and indicating track relationship information in media files provides a mechanism for signaling the information of layered track groups and the information of multiple description coding (MDC) track groups, as well as a mechanism for signaling track relationship information in an efficient way. In local playback or unicast streaming applications, to select an independently decodable track for a certain media type, the information of alternate track groups is first found via the track relation box, and one track is selected from an alternate track group for the media type. If stream switching is desired, the switching track group information is found via the track relation box. In multicast applications with scalable or MDC streams, the tracks in a layered or MDC group are found via the track relation box and selected among all the layered or MDC groups.

The invention belongs to the technical field of communication and provides a method for multiple descriptions coding and decoding, a device and a system. The technical proposal of the invention is as follows: an encoding end receives a signal and processes the signal by a first multiple descriptions method, thus generating at least two first descriptions; at least one of the first descriptions is processed by a second multiple descriptions method, thus generating at least two second descriptions which are then encoded; a multiple descriptions bit stream is output; an decoding end carries out reverse transform process of the encoding end and outputs a reconstructed signal. By adopting the invention, complexity of the multiple descriptions decoding can be reduced and acoustic injuries can be distributed in different aspects, thus enhancing auditory feeling of users.

A method estimates bit rates for sets of coding parameters, based on characteristics of a channel, and an end-to-end distortion is estimated based on signal statistics of the video. A particular set of coding parameters that satisfies an available bit rate of the channel and that minimizes the end-to-end distortion of the video is selected. Motion compensated multiple descriptions of the video are encoded according to the selected set of coding parameters.

The present invention is directed to a multiple description transmission system that provides redundancy to combat transmission channel impairments. The multiple description transmission system includes a first and second wireless telephone. The first wireless telephone includes the following: an array of microphones, wherein each microphone in the array of microphones is configured to receive voice input from a user and to produce a voice signal corresponding thereto; an encoder coupled to the microphone array and configured to encode each of the voice signals; and a transmitter coupled to the encoder and configured to transmit each of the encoded voice signals. The second wireless telephone includes the following: a receiver configured to receive the transmitted signals; a decoder coupled to the receiver and configured to decode the signals received by the receiver, thereby producing an output signal; and a loudspeaker that receives the output signal and produces a pressure sound wave corresponding thereto.

The invention discloses an audio signal processing method and system, and a transceiver device of audio signals. At the transmitting end of audio signals, the residue signals and mask threshold signals obtained by the processing of audio signals are respectively coded to residue signals multiple description and multiple description; and every residue signal description and one path of multiplex mask threshold signal description are combined to form a multiplex description that contains the residue signals and mask threshold signals. At the receiving end of the audio signals, the residue signal description and the mask threshold signal description contained in every one of the descriptions received are decommuted, all residue signal descriptions created after decommutation are decoded to one path of residue signals, and then all mask threshold signals created after decommutation are decoded to one path of mask threshold signals. The invention can effectively enhance audio quality in the process of communication and enhance user satisfaction degree.

In one aspect, an encoder comprises arbitrary precision multiple description generation circuitry configured to produce multiple descriptions of a given signal by processing the signal using at least one matrix having a dimension which is selected as a function of a designated number of transmission resources, such as OFDM subcarriers or TDM time slots, that are allocated for transmission of the multiple descriptions. For example, the signal may comprise a vector x of dimension N and the arbitrary precision multiple description generation circuitry may be configured to generate M descriptions of the vector x where the value of M is selected to satisfy a particular one of three possible cases M=N, M>N and M<N depending on the number of subcarriers or time slots allocated for transmission of the multiple descriptions. Other aspects include a decoder, encoding and decoding methods, and associated computer program products.

To provide a conversion program search system that can increase the reusability of conversion programs as well as can find a solution to a data connection problem in a short time. A first-signature generation means 71 generates a first signature indicating, in a binary manner, whether one piece of data meets each of predetermined multiple description formats. A second-signature generation means 72 generates a second signature of a conversion program, based on the difference between the first signatures of conversion-source data and post-conversion data. When a conversion path candidate generation means 74 generates a candidate for a solution to a data connection problem, an evaluation value calculation means 75 calculates the evaluation value of the candidate using the second signature. A conversion path identification means 76 tries conversion paths to serve as a solution in the descending order of the evaluation values.

The invention discloses a data processing and voice call shunting method and system based on big data. The data processing method comprises the steps of: acquiring historical behaviour data of users according to user information; according to the acquired historical behaviour data, performing distributed summary calculation and analysis of user indexes, so that multiple description data of multiple scenes can be obtained; and, according to the multiple description data of the multiple scenes, obtaining a prediction module used for processing voice calls of the users according to a corresponding algorithm. The shunting method comprises the steps of: according to voice call information of the users, obtaining telephone number information of the users; according to the telephone number information of the users, obtaining matched user account information; according to the user account information, predicting problem types of the users; and, according to the problem types of the users, transferring the voice calls into corresponding seats, or, transferring the voice calls into the corresponding seats by an IVR system. By means of the user voice call processing method, device and system based on big data disclosed by the invention, the user retention time in the IVR system is reduced; the communication efficiency is increased; and the operation cost is reduced.

A method and apparatus reliably encode and decode information over a communication system. The method includes transforming two coefficients into two pairs of random variables, one random variable in each pair having substantially equal energy as one random variable in the other pair. The method further includes quantizing each of the pairs of random variables and entropy coding each quantized random variable separately creating an encoded bitstreams. The encoded bitstreams are received by a decoder which first determines which channels of the communication system are working. The encoded bitstream is entropy decoded, inversed quantized and inversed transformed. An inverse transform performs three different transformations depending upon which channels are working, i.e., whether the first, second or both channels are working.

Digital signals, such as image / video signals are converted between a first format and a second format by using Multiple Description Coding, whereby the second format conveys multiple descriptions (D1 to D4; D1′ to D4′) of the digital signals. In combination with MD coding, the signals are jointly subject to an error concealment process. Preferably, the error concealment process takes place in converting said digital signals from the second format conveying multiple descriptions to the first format.

In one aspect, an orthogonal multiple description encoder comprises orthogonal multiple description generation circuitry configured to produce multiple descriptions of a given signal by processing the signal using respective ones of a plurality of orthogonal matrices. Each of the multiple descriptions is generated as a function of the signal and a corresponding one of the plurality of orthogonal matrices. Other aspects include an orthogonal multiple description decoder, orthogonal multiple description encoding and decoding methods, and associated computer program products.

Transmitters and receivers in multiple description coding systems use correlating and decorrelating transforms to generate and process multiple descriptions of elements of an input signal. The multiple descriptions include groups of correlating transform coefficients that permit recovery of an inexact facsimile of the signal if some of the correlating transform coefficients are lost or corrupted during transmission. Noiseless implementations of the correlating and decorrelating transforms are described that allow the signal elements to be quantized with different quantizing resolutions. Implementations using the Fast Hadamard Transform are described that reduce the resources needed to perform the transforms.

The invention discloses a video coding and decoding method based on multiple description CS measurement value. The coding method comprises steps: a video image sequence is divided into a key frame and a CS frame; block-based measurement, quantization and entropy coding are adopted for the key frame; a multiple description idea is adopted for the CS frame to describe a block-based measurement value in two ways; and quantization and entropy coding are separately carried out. The decoding method comprises steps: after key frame data are received, inverse quantization is firstly carried out on entropy decoding to obtain a measurement value, the key frame block is initially reconstructed, and multiple hypothesis prediction and reconstruction are carried out inside the frame; after CS frame multiple description code stream is received, inverse quantization is carried out on entropy decoding; a measurement value based on multiple description is generated; and CS frame multiple description adaptive inter-frame multiple hypothesis reconstruction is carried out. In the condition of not increasing complexity of the coding end, the reconstruction quality and robustness of a video image are improved.