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| Number | Title | Issue Date |
| 8086465 | Transform domain transcoding and decoding of audio data using integer-reversible modulated lapped transforms A “STAC Codec” provides audio transcoding and decoding by processing an encoded audio signal using a backward-adaptive run-length Golomb-Rice (RLGR) decoder to recover transform coefficients of the encoded audio signal. The transform coefficients are then either... | 12/27/2011 |
| 8019616 | Method and apparatus for encoding audio signal, and method and apparatus for decoding audio signal Methods and apparatuses for encoding and decoding of an audio signal using a mixture of a time-frequency method and a parametric method according to the audio band are provided. An encoding method of an audio signal includes: dividing input audio signals into a plur... | 09/13/2011 |
| 7991622 | Audio compression and decompression using integer-reversible modulated lapped transforms A “STAC Codec” provides lossless audio compression and decompression by processing an audio signal using integer-reversible modulated lapped transforms (MLT) to produce transform coefficients. Transform coefficients are then encoded using a backward-adaptive run... | 08/02/2011 |
| 7912731 | Methods, storage medium and apparatus for encoding and decoding sound signals from multiple channels A method for encoding sound signals on multiple channels includes extracting an arbitrary number of sine waves from each of the sound signals. The sine waves include at least a first sine wave, extracted from a first one of the channels and having first-channel info... | 03/22/2011 |
| 7752053 | Audio signal processing using pilot based coding An apparatus for processing a signal and method thereof are disclosed. Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes the steps of obtaining a group reference value... | 07/06/2010 |
| 7454354 | Hierarchical lossless encoding/decoding method, hierarchical lossless encoding method, hierarchical lossless decoding method, its apparatus and program A hierarchical lossless encoding and decoding technology for digital signals such as of music data, audio data, or the like. A lossless reproduced signal is made identical to an input signal even when the processing accuracy in an encoding apparatus and the processi... | 11/18/2008 |
| 7437299 | Coding of stereo signals A method of encoding a multichannel signal, such as a stereophonic audio signal, including at least first and second signal components includes transforming at least the first and second signal components by a predetermined transformation into a principal signal inc... | 10/14/2008 |
| 7433825 | Apparatus and method for producing a data stream and apparatus and method for reading a data stream An entropy encoder includes an apparatus for producing a data stream which comprises two reference points, of code words of variable lengths, the apparatus comprising a first device for writing at least a part of a code word into the data stream in a first direction... | 10/07/2008 |
| 7395346 | Information frame modifier A device in a subscriber television system receives a stream of frames of information, and each frame of information is carried in at least one network packet that is formatted according to a first protocol. Each network packet carries an application packet that is ... | 07/01/2008 |
| 7395209 | Fixed point audio decoding system and method A digital audio decoder for receiving an encoded audio signal and decoding the audio signal. The digital audio decoder uses both real time computations and calculations pre-stored in a look-up table to decode the encoded audio signal. The digital audio decoder uses ... | 07/01/2008 |
| 7359521 | Aliasing cancellation in audio effects algorithms A method for effecting aliasing cancellation in an audio effects algorithm using a delay modulated signal, derived from interpolation of a delay modulator at an instantaneous sampling frequency, including: determining the instantaneous sampling frequency 1/Tisf... | 04/15/2008 |
| 7343286 | Method and apparatus for digital signal processing A method and an apparatus analogically output low-resolution digital signals to achieve an equal analog output result of a high-resolution digital signal under a request of signal quality. The low-resolution digital signals are compensatively output multiple times t... | 03/11/2008 |
| 7330562 | Watermarking in the time-frequency domain Methods and systems for time-frequency domain watermarking of media signals, such as audio and video signals. An encoding method divides the media signal into segments, transforms each segment into a time-frequency representation, and computes a time-frequency domai... | 02/12/2008 |
| 7328283 | Header compression/decompression apparatus and header compression/decompression method A header compression/decompression apparatus that improves the throughput of an overall multilayer protocol stack at a network node. In this apparatus, an encoding section 106 compresses multilayer header information included in a protocol data unit on a mult... | 02/05/2008 |
| 7313519 | Transient performance of low bit rate audio coding systems by reducing pre-noise Distortion artifacts preceding a signal transient in an audio signal stream processed by a transform-based low-bit-rate audio coding system employing coding blocks are reduced by detecting a transient in the audio signal stream and shifting the temporal relationship... | 12/25/2007 |
| 7299031 | Mobile communication terminal capable of storing audio messages in multiple audio compression formats A mobile communication terminal stores a plurality of response messages generated according to respectively different audio compression methods. If the mobile communication terminal is not answered when an incoming call is received, the mobile communication terminal... | 11/20/2007 |
| 7289961 | Data hiding via phase manipulation of audio signals Data are embedded in an audio signal for watermarking, steganography, or other purposes. The audio signal is divided into time frames. In each time frame, the relative phases of one or more frequency bands are shifted to represent the data to be embedded. In one emb... | 10/30/2007 |
| 7286670 | Method and apparatus for chaotic opportunistic lossless compression of data The present invention is a compression method for compressing digital data. The data is strings of digital values, which can be broken down to a series of 1's and 0's. The present inventive method uses a chaotic system to compress the data. The first step in the inv... | 10/23/2007 |
| 7283968 | Method for grouping short windows in audio encoding Windows of the first type and windows of the second type are identified within a frame using energy associated with each short window within the frame. The short windows of the first type and the short windows of the second type are then grouped into two preliminary... | 10/16/2007 |
| 7269564 | Method and apparatus to indicate an encoding status for digital content A method of determining an encoding rate for digital content. According to the method, the a sample of the content data is encoded for a predetermined period of time. The encoding rate is calculated by knowing the size of the sample of content encoded and the length... | 09/11/2007 |
| 7269550 | Encoding device and decoding device An encoding device (200) includes: a time characteristic extracting unit (203) that specifies a band for a part of a frequency spectrum based on a characteristic of an audio input signal in a time domain; a time transforming unit (204) that tran... | 09/11/2007 |
| 7257710 | Additional-data embedding apparatus and additional-data embedding method The present invention provides an additional-watermark embedding apparatus for embedding predetermined additional data into original data. The additional-watermark embedding apparatus includes an adder for summing the original data and the additional data, a first a... | 08/14/2007 |
| 7246318 | Application programming interface for utilizing multimedia data A computing system, which is in communication with a multimedia source and that includes at least one application for processing multimedia content from the multimedia source, includes an Application Programming Interface (API) for obtaining basic multimedia informa... | 07/17/2007 |
| 7236837 | Reproducing apparatus A reproducing apparatus according to the present invention includes a thinning-out unit for thinning out part of a plurality of continuous audio digital data, and a conversion unit for simply increasing or decreasing variations in the amplitude of either continuous ... | 06/26/2007 |
| 7230177 | Interchange format of voice data in music file A music apparatus has a data storage, a controller and a sound generator for reproducing a music sound and a voice sound. The data storage stores a music data file containing a music part and a voice part, the music part containing a sequence of music generation eve... | 06/12/2007 |
| 7136811 | Low bandwidth speech communication using default and personal phoneme tables A voice coding and decoding system 300 and method uses a personal phoneme table (320, 344) associated with a voice signature identifier (348) to permit encoding of true sounding voice by personalizing the phoneme table used for encoding and deco... | 11/14/2006 |
| 7126501 | Floating point type digital signal reversible encoding method, decoding method, devices for them, and programs for them Digital signal samples X in a floating-point format, each of which is composed of 1 bit of sign, 8 bits of exponent E and 23 bits of mantissa M, are converted through rounding by an integer formatting part 12 into digital signal samples Y in an integer format... | 10/24/2006 |
| 7124434 | Information transmission system, and information sending apparatus and information receiving apparatus used therein A receiver sends a first random number to a transmitter. The transmitter generates a sync signal in response to the first random number sent from the receiver. The transmitter embeds the sync signal and key information in a second random number to generate a composi... | 10/17/2006 |
| 7113610 | Virtual sound source positioning Indicating a spatial location of a virtual sound source by determining an output for each of one or more physical speakers as a function of an orientation of corresponding virtual speakers that track the position and orientation of a virtual listener relative to the... | 09/26/2006 |
| 7107212 | Bitstream data reduction coding by applying prediction A data processing apparatus for data processing an audio signal includes an input terminal (1) for receiving the audio signal, a 1-bit A/D converter (4) for A/D converting the audio signal to for a bitstream signal, a prediction unit (10) for ca... | 09/12/2006 |
| 7096240 | Channel coupling for an AC-3 encoder Channel coupling for an AC-3 encoder, using mixed precision computations and 16-bit coupling coefficient calculations for channels with 32-bit frequency coefficients. ... | 08/22/2006 |
| 7092774 | Multi-channel audio processing system with real-time program duration alteration The total running time of an original multi-channel program signal is altered to generate a time-shortened (or time-lengthened) program signal. The original program signal may be thought of subdividable into a sequence of program signal portions, each program signal... | 08/15/2006 |
| 7076421 | Method and system for supporting increased channel density An exemplary multi-channel speech processor comprises a controller capable of interfacing with a plurality of channels, and at least one signal processing unit (SPU) coupled to the controller, where the multi-channel speech processor has a maximum execution time for... | 07/11/2006 |
| 7069223 | Compressed code decoding device and audio decoding device An audio decoding device is provided for decoding NA (where NA>1) channels of audio signals by a sub-band synthesis operation using sub-band synthesis filter data and sub-band signal data. The decoding device includes a first memory section for... | 06/27/2006 |
| 7050965 | Perceptual normalization of digital audio signals A method of normalizing received digital audio data includes decomposing the digital audio data into a plurality of sub-bands and applying a psycho-acoustic model to the digital audio data to generate a plurality of masking thresholds. The method further includes ge... | 05/23/2006 |
| 7047201 | Real-time control of playback rates in presentations Media encoding, transmission, and playback processes and structures employ a multi-channel architecture with different audio channels corresponding to different playback rates for a presentation to be transmitted over a network. Audio frames in the various audio cha... | 05/16/2006 |
| 7043440 | Play back apparatus When the quick traverse play back command (or, quick returning play back command) of the audio information by the compression audio information is given to the play back apparatus, by the control of the control section, the special audio according to the temporarily... | 05/09/2006 |
| 7027989 | Method and apparatus for transmitting real-time data in multi-access systems The invention provides a method and apparatus for transmitting real-time data in a multi-access system which eliminates clipping of the data while reducing transmission delays. The invention can be incorporated in any multi-access system where transmission resources... | 04/11/2006 |
| 7026537 | Multiplexing system for digital signals formatted on different standards, method used therein, demultiplexing system, method used therein computer programs for the methods and information storage media for storing the computer programs A user is fingering a piece of music on an electronic piano in ensemble with the playback of a piece of music recorded in a compact disc; while the user is playing the piece of music, the electronic piano generates MIDI music data codes representative of the fingeri... | 04/11/2006 |
| 7016850 | Method and apparatus for reducing access delay in discontinuous transmission packet telephony systems Speech at the beginning of a talkspurt in a discontinuous transmission (DTX) packet telephony system is speeded up to help make up for an access delay incurred during channel allocation. Incoming speech frames are buffered, a pitch period for a current portion of th... | 03/21/2006 |
