39 results about "Bitstream format" patented technology

A system, method, and bit-stream format thereof for delivery, scalable encoded media data is described. The scalable encoded bit-stream is formatted to have first and second portions. The first portion corresponds at least to non-media type specific scalability attributes of the original encoded media data and data structure information of a second portion and the second portion corresponds to the original scalable encoded media data arranged in a non-media type specific indexable data structure having at least one dimension. The formatted media data allows the system and method to provide seamless, flexible delivery to media destinations having a variety of receiving attributes. The media data is transcoded prior to delivery based on the receiving attributes of the media destination and non-media specific scalability attributes of the formatted scalable encoded media bit-stream.

A low-bitrate encoding system includes: a time-frequency transform unit transforming an input time-domain audio signal into a frequency-domain audio signal; a frequency component processor unit decimating frequency components in the frequency-domain audio signal; a psychoacoustic model unit modeling the received time-domain audio signal on the basis of human auditory characteristics, and calculating encoding bit allocation information; a quantizer unit quantizing the frequency-domain audio signal input from the frequency component processor unit to have a bitrate based on the encoding bit allocation information input from the psychoacoustic model unit; and a lossless encoder unit encoding the quantized audio signal losslessly, and outputting the encoded audio signal in a bitstream format. Using the low-bitrate encoding system, it is possible to effectively compress data at a low bitrate, and thus to provide a high quality audio signal.

An embedded system bus is woven between a plurality of embedded master elements and at least one slave element within the FPGA device, and provides an external processor interface allowing direct access to any of the plurality of embedded slave elements. Using the embedded system bus, any of a plurality of masters may be allowed to program an embedded element, e.g., embedded FPGA logic, whereas conventional FPGAs allowed only a single master (e.g., a processor) to program the embedded FPGA logic. The embedded system bus is a group of signals, typically data, address and control, that connects system elements together and provides a basic protocol for the flow of data. The embedded system bus allows for control, configuration and status determination of the FPGA device. The embedded system bus is preferably a dedicated function available at all times for arbitrated access to allow communication between the various embedded system components.

A method and apparatus for encoding and decoding video performs transformation of at least a portion of a high-resolution video frame into a low resolution image and a plurality of enhancement data sets, encodes the low resolution image as a primary coded picture in a bitstream format and encodes each of the plurality of enhancement data sets as a different redundant coded picture in the bitstream format. For decoding, a decoded low resolution image and a plurality of decoded enhancement data sets are generated and an inverse transform is performed to construct a decoded high-resolution mage. The primary coded picture and a redundant coded picture may be formatted according to the ITU-T H.264 Advanced Coding specification. The transform may be a polyphase or a sub-band transform.

An apparatus and method for providing efficient connectivity to the Internet via a satellite communication link. A particularly useful embodiment of the invention comprises a an apparatus and method for webcasting live events over a satellite communication link. Digital multimedia data is converted to a bitstream format by an encoder. The encoder supplies the bitstream data to an uplink subsystem for transmission to a satellite. The satellite retransmits the data to a ground-based facility which makes the content available to subscribers over the Internet, either directly or through an independent Content Delivery Network. A novel TCP proxy process adjusts for propagation delays associated with the satellite path. Preferably, the TCP proxy resides in the uplink and the ground-based receiver that receives the bitstream data that is transported by the satellite, or by a router configured to provide such a TCP proxy process.

A method and system for encoding and recording data in a multi-stream format when the data is initially captured. The multiple streams of data can be combined to provide a high quality, or high resolution, representation, while a reduced subset of the streams can provide a lower quality, or lower resolution, representation. Data storage requirements can be reduced, by deleting one or more of the streams, when there is no longer a need for retention of the data at the higher quality.

An mp3-standard bitstream is formatted into a sequence of fixed-length data frames. These include headers, side information, main information and a remaining data field without generally defined information denoted as 'ancillary data'. The mp3PRO format is an extension of the mp3 format, wherein the additional mp3PRO data are transferred in the ancillary data fields. In various applications, e.g. Internet music search machines, a necessity arises for a fast determination of the bitstream types. Such determination is normally executed using an mp3PRO decoder. However, because the frame header does not contain a corresponding pointer to the start address of the ancillary data field, an mp3PRO decoder must first completely decode at least one data frame according to the mp3 standard in order to find the end address of the mp3 data and thereby the following start address of the mp3PRO data in that data frame. Thereafter the mp3PRO decoder must examine the data following in the data stream for characteristics that are typical for mp3PRO additional information. The invention discloses how the bitstream type can be determined without using mp3 decoding and without using an mp3PRO decoder.

The related speaker verification system (1) based on a distributed structure comprises: a system front end (2) to collect speech sound, extract feature, compress into the bit-flow format and send to (3); a data transmission channel (3) to communicate between (2) and (4); and a system back end (4) to decompress the data into the feature for verification. This invention improves storage level and calculation capacity, can fit the content decision request, and can avoid forgery.

Methods, systems, and products for remote direction of streaming digital content from a multiplicity of sources of digital information to a multiplicity of client devices, including receiving digital content from the sources, receiving from a remote director and storing in computer memory remote director instructions, transcoding the digital content from sources into digital content having streaming format, including in an output stream, in dependence upon the remote director's instructions, digital content having streaming format, and communicating to client devices the output stream.

The invention provides a SILK-based voice encoder coding efficiency increasing method. The method comprises the following steps: firstly, adding specified noise into an input voice signal to generatean analog signal, performing long-time and short-time prediction on the analog signal in order to improve prediction gain of a prediction filter and reduce entropy of quantization index, and increasethe coding efficiency; secondly, determining a drive signal at a coding end by precepting the weighting in minimum to rebuild an error; compressing frequency spectrum area with high relevance betweenquantizing noise and the signal at the decoding end by adopting a post filtering; adding different weighing filters into an input signal and a rebuilt signal of a noise shaping quantizer in order thatthe combination of the two functions in the quantizer at the coding end is realized. By adopting the method provided by the invention, sideband information is not required, a bitstream format is notrequired to be changed, the coding efficiency of the SILK is increased.

An apparatus, method and medium for processing audio signals using correlation between frequency bands. The device includes: an encoding unit that encodes an input audio signal; and a decoding unit that decodes the encoded input audio signal; wherein the encoding unit includes a correlation analyzer that searches the first subband and each The most similar subbands having a correlation greater than a predetermined value between the most similar subbands among the first subbands generate information on the second searched subbands, and the decoding unit includes a high-frequency component restoration section that uses the the generated information on the second subband generated by the correlation analyzer and transmitted in bitstream format copies data on the second searched subband as data on the first subband to perform decoding on the first subband, Also, the first subband is a subband belonging to a high frequency band among frequency bands obtained by subband filtering the input audio signal, and the second subband is a subband belonging to a low frequency band among frequency bands obtained by subband filtering.

An information handling system includes a processor that may perform decoding of a variable-length code (VLC) bitstream after preprocessing the bitstream. The bitstream includes multiple VLC symbols as binary codewords. The processor analyzes incoming VLC bitstream information and generates VLC codeword symbol information in conformance with a VLC lookup table. The processor may access a 2 dimensional VLC lookup table in real time or on-the-fly. The VLC lookup table may reside in a system memory of the IHS. The single VLC lookup table may exhibit two dimensional indexing by leading zero count and bit-length possibility.

The invention relates to a scalable video (de)coding method for wireless transmission of high definition television signals. Scalable means that the bitstream contains successively smaller quality refinements and that the bitstream can be truncated. The video images are divided in slices, and each slice is divided in blocks of 8×8 pixels. For each block, an optimal encoding method is chosen. Depending on whether the block is found to contain natural or synthetic image content, transform coding (DCT) or graphic coding is applied. Because the different encoding modes have different properties as regards picture quality, the bitstream format has to enable the encoder to very flexibly choose which bits to send first. The bitstream format in accordance with the invention consists of a multitude of scans (31-34) through the coded data of a series of individual blocks, e.g. a slice. In each scan, the encoder decides whether it will include data for natural blocks (BS1,BS2), for synthetic blocks (BS0,BS1), or both. For the DCT blocks, it can further choose between DC coefficient bits (22) and AC coefficient bits (23). For example, the encoder can choose to first send a few scans of DCT DC bits, then send a few scans of graphics bits and then send some DCT AC bits. The decisions that the encoder makes are signaled to the decoder in the form of flags that precede each block part (e.g. encoded bit plane) and / or plurality of blocks (e.g. a slice).

A method for stereo audio perceptual encoding of an input signal includes masking threshold estimation and bit allocation. The masking threshold estimation and bit allocation are performed once every two encoding processes. Another method for stereo audio perceptual encoding of an input signal includes performing a time-to-frequency transformation, performing a quantization, performing a bitstream formatting to produce an output stream, and performing a psychoacoustics analysis. The psychoacoustics analysis includes masking threshold estimation on a first of every two successive frames of the input signal.

The invention relates to the technical field of computer application, especially a general byte stream parsing system of big data collection and a realization method of the system. The system is composed of a byte stream pre-processor and a two-dimensional table analyzer. According to conventional automatic verification data, the byte stream preprocessor preprocesses data by selecting a corresponding decompression and decryption method automatically according to a compression and encryption manner; the two-dimensional table analyzer defines a two-dimensional table according to the byte stream format, data information is stored in rows and row groups, columns are used to mark the name, data type and length of each field, after that the byte stream of data is read in, the byte stream is segmented into multiple fields according to the bit length defined in each column, and the segmented byte stream is parsed into corresponding information according to data types; and data or set information read by the rows or multiple rows in the row group is read, and concrete field information of the data rows is read via the field name of the column. According to the invention, repeated defining, compiling and parsing are avoided, and the system and method are suitable for parsing data of complex and diversified structures in big data collection in a unified manner.

Methods and apparatuses for encoding and decoding video are disclosed. The method of encoding video includes assigning (12) a distortion versus quantization curve to a block in a picture of a video based on a perceptual metric classification of the block, determining a quantization parameter (132) for the block based on the distortion versus quantization curve and a target distortion for the block, the target distortion being an overall target distortion for the picture and encoding (16) the block based on the quantization parameter. A bitstream formatted to include encoded data, and computer-readable storage mediums and computer-readable program products for encoding and decoding video are also disclosed.

An audio encoder includes a time-frequency mapping block, a psychoacoustic model block, a middle / side (M / S) encoding block, a parameter calculation block, a bit allocation and quantization block and a bitstream formatting block. The encoder is forced to operate in M / S mode for reducing the calculation time of the parameter used for bit allocation, quantization and encoding. In addition, the calculation of the parameter only needs to consider the middle and side channels but not the left and right channels, thus the complexity of the psychoacoustic model for analyzing the input audio signal can be reduced.

The invention discloses a kudu data import system and method based on a byte stream format, belonging to the technical field of software service data synchronization. The kudu data import system basedon a byte stream format includes a source database, a source database extraction service module, a message-oriented middleware cluster module, a kudu warehousing service module and a kudu database. The source database extraction service module obtains the data stream of the source database, the message middleware cluster module forwards the data stream of the source database, and the kudu warehousing service module parses the table structure data of the source database, the total data of the source database, and the incremental data of the source database, and saves the data to the kudu database The kudu data import system based on the byte stream format of the invention supports distributed deployment, can make full use of machine performance, effectively improve data storage speed, andhas good popularization and application value.

Methods and apparatuses for encoding and decoding video are disclosed. The method of encoding video includes assigning (12) a distortion versus quantization curve to a block in a picture of a video based on a perceptual metric classification of the block, determining a quantization parameter (132) for the block based on the distortion versus quantization curve and a target distortion for the block, the target distortion being an overall target distortion for the picture and encoding (16) the block based on the quantization parameter. A bitstream formatted to include encoded data, and computer-readable storage mediums and computer-readable program products for encoding and decoding video are also disclosed.

An information handling system includes a processor that may perform preprocessing on a variable-length code (VLC) bitstream before decoding the bitstream. The bitstream includes multiple codewords. The processor analyzes incoming VLC bitstream information and generates codeword table information for storage in a system memory or a VLC codeword tables location. The processor generates a VLC lookup table from the information in the VLC codeword tables and stores that VLC lookup table in a system memory of the IHS. The VLC lookup table may exhibit two dimensional indexing by leading zero count and bit-length possibility.

A signal processing device having an automatic sound field correction function includes: a digital formatting section for converting a signal pair of a test signal and a picked-up sound signal for an automatic sound field correction operation into a bit stream format; and a selecting section for selectively supplying either a bit stream generated by the digital formatting section or an audio bit stream to an existing interface. The selecting section selects the bit stream of the signal pair of the test signal and the picked-up sound signal during trial manufacturing, repairing, maintenance, and the like.

A method for stereo audio perceptual encoding of an input signal includes masking threshold estimation and bit allocation. The masking threshold estimation and bit allocation are performed once every two encoding processes. Another method for stereo audio perceptual encoding of an input signal includes performing a time-to-frequency transformation, performing a quantization, performing a bitstream formatting to produce an output stream, and performing a psychoacoustics analysis. The psychoacoustics analysis includes masking threshold estimation on a first of every two successive frames of the input signal.

Apparatus, method, and medium for processing an audio signal using a correlation between bands are provided. The apparatus includes an encoding unit encoding an input audio signal and a decoding unit decoding the encoded input audio signal. The encoding unit includes a correlation analyzer searching a most similar subband having a correlation of more than a predetermined value between a first subband and the most similar subband from second subbands and generating information about the second searched subband, and the decoding unit comprises a high frequency component restoring portion (copying data about the second searched subband as data about the first subband, using the generated information about the second subband generated by the correlation analyzer and transmitted in a bit stream format, to perform decoding on the first subbands, and the first subbands are subbands that belong to a high frequency band in a band of a result of subband-filtering the input audio signal and the second subbands are subbands that belong to a low frequency band in a band of the result of subband-filtering.