313 results about "Hierarchical coding" patented technology

A compression context for a plurality of packets is established with a receiving device. Each of these packets is associated with one or more reliable multicast protocols, such as the Layered Coding Transform (LCT) protocol, the Asynchronous Layered Coding (ALC) protocol, the FLUTE protocol, the MUPPET protocol, and the NACK-Oriented Reliable Multicast (NORM) protocol. Upon establishment of the compression context, a compressed packet is generated for one of the plurality of packets and transmitted to the receiving device. The compressed packet has a reduced number of bits in its header. Upon receipt, the receiving device decompresses the compressed packet based on the compression context.

Visualization techniques are provided for a clustered multidimensional dataset. A data set is visualized by obtaining a clustering of a multidimensional dataset comprising a plurality of entities, wherein the entities are instances of a particular concept and wherein each entity comprises a plurality of features; and generating an icon for at least one of the entities, the icon having a plurality of regions, wherein each region corresponds to one of the features of the at least one entity, and wherein a size of each region is based on a value of the corresponding feature. Each icon can convey statistical measures. A stabilized Voronoi-based icon layout algorithm is optionally employed. Icons can be embedded in a visualization of the multidimensional dataset. A hierarchical encoding scheme can be employed to encode a data cluster into the icon, such as a hierarchy of cluster, feature type and entity.

In layered VDR coding, inter-layer residuals are quantized by a non-linear quantizer before being coded by a subsequent encoder. Several non-linear quantizers are presented. Such non-linear quantizers may be based on sigmoid-like transfer functions, controlled by one or more free parameters that control their mid-range slope. These functions may also depend on an offset, an output range parameter, and the maximum absolute value of the input data. The quantizer parameters can time-vary and are signaled to a layered decoder. Example non-linear quantizers described herein may be based on the mu-law function, a sigmoid function, and / or a Laplacian distribution.

Layered Video Multicast with Retransmissions (LVMR) is a system for distributing video content using layered coding over the Internet. The two key contributions of the system are (1) improving the quality of reception within each layer by retransmitting lost packets given an upper bound on recovery time and applying an adaptive playback point scheme to help achieve more successful retransmission, and (2) adapting to network congestion and heterogeneity using a hierarchical rate control mechanism. A hierarchical rate control system and method is disclosed for regulating the flow of video information in a network by establishing subnet agents for each subnet, and by establishing intermediate agents for each domain. The subnet agents gather information concerning add-layer experiments conducted by receivers in a subnet, and the information is provided to intermediate agents of the domains for regulating data traffic.

In a picture coding apparatus and a picture coding method, when a picture data is hierarchically coded, compression efficiency can be improved, and the deterioration of picture quality can be reduced. When a picture data is hierarchically coded by utilizing a recursive hierarchical representation, adaptive division of block is performed corresponding to the characteristic of the picture data and then coding is performed, and thus obtained hierarchical coded data is transmitted, so that the block of the lower hierarchy can be adaptively divided, thereby the information quantity such as a plane portion of picture can be reduced.

A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hierarchical encoding process only for channel pairs including a first channel having only information of a left side with respect to a listening position and including a second channel having only information from a right side with respect to a listening position. As within the hierarchical process the multiple audio channels of the audio signal are downmixed iteratively into monophonic channels, one can pick the relevant parameters from an encoding step involving only channel pairs carrying the information needed to describe the spatial properties of the multi-channel audio signal.

A compression context for a plurality of packets is established with a receiving device. Each of these packets is associated with one or more reliable multicast protocols, such as the Layered Coding Transform (LCT) protocol, the Asynchronous Layered Coding (ALC) protocol, the FLUTE protocol, the MUPPET protocol, and the NACK-Oriented Reliable Multicast (NORM) protocol. Upon establishment of the compression context, a compressed packet is generated for one of the plurality of packets and transmitted to the receiving device. The compressed packet has a reduced number of bits in its header. Upon receipt, the receiving device decompresses the compressed packet based on the compression context.

The present invention relates to a method and an apparatus for encoding / decoding a video using a split layer. The video encoding / decoding method generates an encoded image data by encoding a current block partitioned into a plurality of subblocks, generates an encoded partition information data by encoding partition information of the current block, generates a bitstream including the encoded image data and the encoded partition information data, and then reconstructs the video image from the generated bitstream. According to the present disclosure, when encoding a high resolution video with variable sized blocks, various block shapes may be used for the encoding, and efficient encoding and decoding of the block partition information can improve the compression efficiency.

A wireless communication apparatus in a hierarchically coded modulation system can use error control mechanisms generated during decoding of base layer information to predict a probability of successful demodulation of enhancement layer information. Performance in the demodulation of the base layer correlates to performance in the demodulation of the enhancement layer. The receiver can determine whether to attempt demodulation of temporally correlated enhancement layer data based in part on the predicted probability of success. If the receiver determines not to demodulate the enhancement layer, the receiver can power down the enhancement layer demodulator, or otherwise minimize the power expended in the enhancement layer demodulator.

The present invention relates to specification of a tile capable of being independently processed to process a certain area at high speed in encoding and decoding of tiles resulting from division of an image in hierarchical coding of the image,An image encoding apparatus that performs the hierarchical coding of an input image with multiple layers includes an acquiring unit and an encoding unit. The acquiring unit acquires a first image generated from the input image and a second image having resolution different from that of the first image. In the encoding of a first area in the first image acquired by the acquiring unit, the encoding unit performs the encoding using a second area existing at the relatively same position as that of the first area in the first image in the second image as a reference image.

An image processing apparatus hierarchically compresses and codes image data by subjecting pixel values of the image data to a discrete wavelet transform, quantization and coding for each of one or a plurality of rectangular regions into which the image data is divided. The image processing apparatus includes a hierarchical coding unit to compress and code the image data in a state where the image data is divided for each hierarchical layer, to obtain compressed codes, and a distributively storing unit to distributively store the compressed codes that are divided for each hierarchical layer by the hierarchical coding unit.

A method for providing access to operation information relating to a digital signal, including providing a digital signal encoded, in accordance with a layered encoding scheme, in a plurality of layers, and extracting operation information from a first layer of encoding within the digital signal, and placing the extracted information in a data section in a second layer of encoding within the digital signal. Related methods and apparatus are also described.

The invention discloses a self-adapting interlayer texture prediction method of H.264 / SVC. When every intra-frame slice of an enhancement layer of the current space is encoded, the method comprises the following steps: sixteen corresponding reference layer pixels are determined for each pixel of the current layer, and a two-dimensional Wiener filter is utilized for carrying out interpolation filtering on the sixteen corresponding reference layer pixels, so that interlayer texture predicted values corresponding to the pixels of the current layer can be obtained; and the coefficient of the two-dimensional Wiener filter is transmitted into a decoding terminal. Correspondingly, when every intra-frame slice of the enhancement layer of the current space is processed by the decoding terminal, theinterpolation filtering is carried out on the sixteen corresponding reference layer pixels corresponding to the each pixel of the current layer according to the filter coefficient sent by a coding terminal, and the interlayer texture predicted values of the pixels of the current layer can be obtained. The method can be applied to improve the performance of the interlayer texture prediction and SVC space hierarchical coding efficiency.

The invention discloses a hierarchical coding and decoding method and the device thereof. In the embodiment of the invention, the hierarchical and coding decoding proposal adopts the steps as following, after an input signal is converted into a MLT (Modulated Lapped Transform) coefficient, according to an auditory perception model, the input signal is divided into a kernel layer signal and an enhancement layer signal, and then an overlapped and packed coding data is obtained; during decoding, according to the auditory perception model, after the weighted calculation is performed to the importance of each sub-band in the enhancement layer, the reverse MLT is performed to the obtained MLT coefficient of the kernel layer and the enhancement layer, and the decoding flow is output. Compared with the prior hierarchical coding decoding art, in the invention, the MLT is performed to the input signal, the weighted calculation is performed to the importance of each sub-band in the enhancement layer according to the auditory perception model, thus, the quality of coding and decoding is enhanced, and the problem that the input signal with high sampling rate can not be effectively processed in the prior art is solved.

An image decoding device for decoding a hierarchically encoded compressed code obtained by dividing an image into a plurality of tiles and performing discrete wavelet transform on the pixel values of the image tile by tile includes a tile boundary smoothing part that performs smoothing of tile boundary distortion on the image after the decoding by application of a low-pass filter. The tile boundary smoothing part controls the degree of smoothing of the low-pass filter according to the ratio of the decoding quantity to the entire quantity of the compressed code. The decoding quantity is the portion of the compressed code which portion is to be decoded.

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.

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.

A video signal shuffling device forms a segment with blocks having a given offset value in horizontal and vertical directions from a given starting point uniquely determined on the screen, the offset value being identical in every region. The segment is formed in a unit of one frame or two frames. The shuffling device divides one frame comprising blocks into a plurality of regions. A coding device determines a final priority as well as a final quantizer thereby quantizing a segment and providing the segment with a variable-length-coding based on a first priority, coding-quantity obtained from a plurality of quantizers, second priority and a quantizer. A coding device and its decoder, the coding device carries out a hierarchical coding by only a motion vector in a compressed stream at a lower resolution side and by agreeing a motion detected and a DCT block size with a size on the screen.

An amount of bandwidth is allocated to a transport of content information as data via a data connection before initiating the transport. The content information is encoded in a layered coding scheme using a base layer and at least one enhancement layer. First it is determined if the data connection is in use for a further transport of further content information as further data via the data connection. Then one or more further attributes are determined of the further transport. Then, a number of the one or more enhancement layers of the content information are determined for the transport under control of a pre-determined policy depending on the one or more further attributes of the further transport.

In an image communication system including a server which stores image data encoded in accordance with a hierarchy coding, and a client configured to download the image data from the server and display the image data, the server determines on the basis of a request received from the client whether a specific command is requested, when the specific command is requested, generates return data by adding additional data representing the encoding condition of the image data encoded in accordance with the hierarchy coding to image data which has undergone processing designated by the specific command, and transmits the return data to the client. With this arrangement, the client can receive desired image data by one communication between the server and the client.

Aspects of the subject disclosure may include, for example, a video camera that includes a video capture device configured to produce a high resolution video signal. A video encoder is configured to layered video encode the high resolution video signal to generate a processed video signal, the processed video signal including a plurality of independent video layers, each of the plurality of independent video layers having a different video resolution. Other embodiments are disclosed.

A method, medium, and apparatus hierarchically encoding or decoding an image format. In this method, a basic image is generated by down-sampling an original image. A basic layer bitstream is generated by encoding the basic image. A restoration image of the basic image is generated and up-sampled. Enhancement layer bitstreams are generated by encoding a residue image corresponding to a difference between the original image and the up-sampled restoration image by using different quantization parameters.

There are provided an image processing method and image processing apparatus, which can suitably access a necessary partial image, and can suppress wasteful data transfer by returning data with a small number of tiles for a thumbnail image of a low resolution or the like so as to reduce the number of times of file seek operations, and returning data with a large number of tiles for an image of a high resolution to be returned in response to an enlargement request. To this end, a server encoded data fragmentarily transmits encoded data which is hierarchically encoded by dividing an image into a plurality of tiles in response to a request from a client. The server calculates an occupation ratio of the displayed area of the image requested from the client to the entire image. When the ratio is equal to or lower than a threshold, the server selects encoded data divided to have a larger number of tiles. Otherwise, the server selects encoded data with a smaller number of tiles. The server extracts data corresponding to the displayed area from the selected encoded data, and transmits the extracted data to the client.

The invention discloses a method for transmitting and receiving streaming media data, a device and a system thereof. The method comprises the following steps: the hierarchically coded hierarchical coding data is dispersed into data segments according unit time length to be coded and transmitted in a way that hierarchical coding is carried out on the streaming media data in a streaming media server; a streaming media receiving node selects the received hierarchical data, wherein, the selected data segments corresponding to hierarchy received from the streaming media server, or the selected data segments corresponding to hierarchy received from other streaming media receiving nodes are combined according to the number of data segments, the hierarchy, and a sequence of playing time of the streaming media data, and the hierarchical coding data obtained by combination is decoded and played. Therefore, the streaming media receiving node can selectively receive different hierarchical data according to self capacity and / or network status of the node, and improve the playing quality of the streaming media by further acquiring data of an enhanced layer, on the premise that basic layer data is acquired to ensure the acquisition of basic playing quality.

The present invention discloses a method for solving open-type long video question and answer by using a hierarchical codec network mechanism, which mainly comprises the following steps: 1) training an adaptive hierarchical coding neural network for a group of video, question and answer training set, segmenting the long video based on a question and video learning adaptive segmentation mechanism,thereby obtaining a joint expression of the video segment and the question; 2) for the output of the coded neural network obtaining the joint expression of the video and the question, combining the idea of reinforcement learning together with a related answer to train a decoding neural network, directed at a natural language answer corresponding to the output of the joint expression of the video and the question. Compared with the general video question and answer solution, the method for solving open-type long video question and answer by using a hierarchical codec network mechanism in the present invention utilizes question-based adaptive layering, which can better lock the segments favorable for answering questions in long videos, can better reflect the characteristics of the video, andutilizes the reinforcement learning mechanism to train the decoder, so that a more powerful decoder can be obtained, and an answer better satisfying the requirement is produced. The effect achieved by the method in the present invention in the long video question and answer questions is better than the traditional method.

The invention relates to a method for transmitting mobile phone network signals. An automatic bandwidth module is used for detecting current available bandwidth and transmiting the result to an adaptive control algorithm module which calculates layer bitstream of layered and coded original data to be transmitted; the layered coding adopts H2.64 / AVC and a real-time transmission module is used for packaging the layer bitsteam to be transmitted into message to be sent to a client. The adaptive control algorithm in the method can predict data amount of certain layer needed by the client and reasonably arrange an opportunity to sending data continuously to ensure sufficient buffer before playing and avoid effect caused by insufficient bandwidth. The method calculates data needing sending by current bandwidth when the status of the current network is not stable or the network speed is low continuously to meet watching requirements of users, minimize the effect of website bandwidth, make most of bandwidth and provide best steam media quality for users.

The present invention relates to an information distribution method based on the incremental fountain, and belongs to the technical field of wireless data transmission. The information distribution method has the following characteristics: a data splitter is used at the transmitting end for arranging the data of the same layer number in the layered and encoded data sequence, so as to form a branch; the sum of the branches is the sum of the layers; a weighting sequence is designed according to the principle of smaller layer number and higher degree of importance; a scheduling parameter calculator is used for calculating the scheduling parameters of each layer in each original data block; the scheduling parameters are transmitted to a scheduling device, which is used for controlling the work of the fountain encoder of different layers according to different probabilities, so as to complete different types of redundancy protection of different layers, thus the system has the capacity of adapting to complex and changeable states of the channel. The method can be used for effective data distribution of no feedback and low redundancy in the poor channel.

A hierarchical data compression system and method for encoding and decoding video data by dividing each video frame of the video data into independent layers. Each of the layers contains a specific frequency band that is less than the entire frequency spectrum contained in the video frame. This impendency allows each layer to be encoded and decoded independently of other layers. Because each layer contains a specific frequency band, any unwanted and extraneous frequencies that arise during encoding that are not present in the original source are automatically removed. In general, the hierarchical data compression method divides video frames into layers, with each layer containing a specific frequency band. The layers then are encoded. Later, the layers are decoded to recover the video frames. The hierarchal data compression system includes a hierarchical encoder and decoder for facilitating independent encoding and decoding of each layer of the divided video frames.

An image decoding device for decoding a hierarchically encoded compressed code obtained by dividing an image into a plurality of tiles and performing discrete wavelet transform on the pixel values of the image tile by tile includes a tile boundary smoothing part that performs smoothing of tile boundary distortion on the image after the decoding by application of a low-pass filter. The tile boundary smoothing part controls the degree of smoothing of the low-pass filter according to the ratio of the decoding quantity to the entire quantity of the compressed code. The decoding quantity is the portion of the compressed code which portion is to be decoded.