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7620545 |
Scale factor based bit shifting in fine granularity scalability audio coding
One embodiment of the present invention provides a method coding audio signals in a base layer and an enhancement layer comprising the steps of quantizing the audio signals in spectral lines into...
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7620543 |
Method, medium, and apparatus for converting audio data
A method, medium, and apparatus for converting compressed audio data, including decoding compressed audio input data, in accordance with a corresponding compression format, coding a result of the...
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7617110 |
Lossless audio decoding/encoding method, medium, and apparatus
A lossless audio encoding/decoding method, medium, and apparatus. The lossless audio encoding method includes converting an audio signal in a time domain into an audio spectral signal with an...
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7617100 |
Method and system for providing an excitation-pattern based audio coding scheme
An improved audio compression scheme is provided. The scheme uses an excitation pattern to more efficiently provide audio signal compression. Under the scheme, an input signal is transformed to the...
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7617093 |
Authoring speech grammars
A method and apparatus are provided for automatically forming a grammar. Example text strings are received and N-grams are formed based on the text strings. A rule in the grammar is then generated...
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7613609 |
Apparatus and method for encoding a multi-channel signal and a program pertaining thereto
To encode multi-channel digital data by adjusting the number of bits allocated to each channel to perform entropy coding of the multi-channel data, there is provided a multi-channel encoder...
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7613603 |
Audio coding device with fast algorithm for determining quantization step sizes based on psycho-acoustic model
An efficient audio coding device that quantizes and encodes digital audio signals with a reduced amount of computation. A spatial transform unit subjects samples of a given audio signal to a...
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7613264 |
Flexible sampling-rate encoder
A method for implementing a flexible sampling-rate encoder, comprising the steps of (A) sampling an input signal at a regular time-interval to produce sampled data, (B) generating a pseudo-random...
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7610205 |
High quality time-scaling and pitch-scaling of audio signals
In one alternative, an audio signal is analyzed using multiple psychoacoustic criteria to identify a region of the signal in which time scaling and/or pitch shifting processing would be inaudible...
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7610195 |
Decoding of predictively coded data using buffer adaptation
A decoder (e.g., an AAC-LTP decoder) receives a stream containing coded audio data and prediction data. The coded data is upsampled or downsampled during decoding. Portions of the decoded data are...
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7609904 |
Transform coding system and method
A transform coding system and method are disclosed which utilize a modified quantization technique which advantageously foregoes the need for inverse quantization at the decoder. New techniques for...
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7607918 |
Method and system for spatial, appearance and acoustic coding of words and sentences
A method encodes a word or words. A sequential input string of symbols representing a word or a plurality of words is parsed into segments. A graph is constructed having spatial levels, each level...
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7603278 |
Segment set creating method and apparatus
A segment set before updating is read, and clustering considering a phoneme environment is performed to it. For each cluster obtained by the clustering, a representative segment of a segment set...
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7599836 |
Voice recording system, recording device, voice analysis device, voice recording method and program
To provide a method of specifying each of speakers of individual voices, based on recorded voices made by a plurality of speakers, with a simple system configuration, and to provide a system using...
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7596492 |
Apparatus and method for concealing highband error in split-band wideband voice codec and decoding
An apparatus for concealing a highband error in a spilt-band wideband voice codec in accordance with the present invention is disclosed. The apparatus includes: a lowband LPC coefficient extracting...
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7593845 |
Method and apparatus for identifying semantic structures from text
A method and apparatus for identifying a semantic structure from an input text forms at least two candidate semantic structures. A semantic score is determined for each candidate semantic structure...
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7590543 |
Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks
The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels...
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7590530 |
Method and apparatus for improved estimation of non-stationary noise for speech enhancement
A central aspect of the invention relates to a method of enhancing speech, the method comprising the steps of, receiving noisy speech comprising a clean speech component and a non-stationary noise...
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7590523 |
Speech post-processing using MDCT coefficients
There is provided a speech post-processor for enhancing a speech signal divided into a plurality of sub-bands in frequency domain. The speech post-processor comprises an envelope modification...
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7587311 |
Device and method for embedding binary payload in a carrier signal
For embedding binary payload in a carrier signal, which, for example, is an audio signal, a sequence of time-discrete values of the carrier signal is converted to the frequency domain by means of...
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7587310 |
Sound processor architecture using single port memory unit
A system and method for implementing a sound processor. The sound processor includes a first voice engine, a second voice engine, and at least one single-port memory unit. An operation of the first...
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7586908 |
Systems and methods for multiple mode voice and data communications using intelligenty bridged TDM and packet buses and methods for performing telephony and data functions using the same
A video conferencing method is provided in a system for managing voice and data communications to a plurality of users. Computer data is communicated between the system and one of a plurality of...
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7583805 |
Late reverberation-based synthesis of auditory scenes
A scheme for stereo and multi-channel synthesis of inter-channel correlation (ICC) (normalized cross-correlation) cues for parametric stereo and multi-channel coding. The scheme synthesizes ICC...
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7577570 |
Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks
The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels...
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7574355 |
Apparatus and method for determining a quantizer step size
For determining a quantizer step size for quantizing a signal including audio or video information, a first quantizer step size as well as an interference threshold are provided. Then, the actual...
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7571380 |
Differential dynamic content delivery with a presenter-alterable session copy of a user profile
Differential dynamic content delivery with a presenter alterable session copy of a user profile. Typical embodiments include providing a session document for a presentation, wherein the session...
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7570748 |
Control and monitoring telecommunication system and method of setting a modulation method
Using a network in which one master station modem 105 and multiple slave station modem 106, 107, 108 are physically connected by rudder connection or bus connection with a telecommunication...
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7565343 |
Search apparatus and search management method for fixed-length data
Fixed-length data ( 560 ) contained in a database ( 560 ) are segmented into a number of pieces of data that are searchable at a time and searching is performed at high speed. As means for it, a...
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7565287 |
Methods and apparatus for efficient vocoder implementations
Techniques for implementing vocoders in parallel digital signal processors are described. A preferred approach is implemented in conjunction with the BOPS® Manifold Array (ManArray™) processing...
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7562012 |
Method and apparatus for creating a unique audio signature
A method and apparatus for creating a signature of a sampled work in real-time is disclosed herein. Unique signatures of an unknown audio work are created by segmenting a file into segments having...
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7558389 |
Method and system of generating a speech signal with overlayed random frequency signal
A method and apparatus utilizing prosody modification of a speech signal output by a text-to-speech (TTS) system to substantially prevent an interactive voice response (IVR) system from...
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7555432 |
Audio steganography method and apparatus using cepstrum modification
Audio steganography methods and apparatus using cepstral domain techniques to make embedded data in audio signals less perceivable. One approach defines a set of frames for a host audio signal,...
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7552336 |
Watermarking with covert channel and permutations
Described herein is a watermarking technology for protecting digital signals, such as a music clip. In another described implementation, a watermarking system employs a permutation technique to...
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7548850 |
Techniques for measurement of perceptual audio quality
An audio processing tool measures the quality of reconstructed audio data. For example, an audio encoder measures the quality of a block of reconstructed frequency coefficient data in a...
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7543588 |
Multi-functional surgical control system switching interface
An interface which allows a surgeon to operate multiple surgical devices from a single input device. The input device may be a foot pedal that provides output signals to actuate a number of...
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7542899 |
Method and apparatus for adjusting the level of a speech signal in its encoded format
A method and apparatus for modifying the level of a speech signal is provided in which the gain parameter in the encoded speech signal is changed in a variable and cyclical manner over time. More...
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7539612 |
Coding and decoding scale factor information
Techniques and tools for representing, coding, and decoding scale factor information are described herein. For example, during encoding of scale factors, an encoder uses one or more of flexible...
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7539345 |
Method of processing image and audio information, image and audio processing apparatus and computer program that causes a computer to process image and audio information
A method of processing image information in which the image information is encoded by the bit plane and compressed by truncating one or more of the bit planes. Since the index parameter indexing...
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7539086 |
System and method for the secure, real-time, high accuracy conversion of general-quality speech into text
The system is designed to interface with external devices and services, to transcribe audio that may be stored elsewhere such as a wireless phone'voice mail, or occurring between two or more...
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7533023 |
Intermediary speech processor in network environments transforming customized speech parameters
A speech processing system is provided for customizing speech parameters across speech applications in a networked environment. The speech processing system includes: a speech processing...
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7529659 |
Method and apparatus for identifying an unknown work
A system for determining an identity of a received work. The system receives audio data for an unknown work. The audio data is divided into segments. The system generates a signature of the unknown...
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7529658 |
Method for specifying equivalence of language grammars and automatically translating sentences in one language to sentences in another language in a computer environment
A method for specifying equivalence of language grammars and automatically translating sentences in one language to sentences in another language in a computer environment. The method uses a...
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7526394 |
Quality assessment tool
Non-intrusive speech quality assessment method and apparatus for: storing a sequence of intercepted packets associated with a call, each packet containing speech data, and an indication of a...
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7523039 |
Method for encoding digital audio using advanced psychoacoustic model and apparatus thereof
A digital audio encoding method using an advanced psychoacoustic model is provided. The audio encoding method including determining the type of a window according to the characteristic of an input...
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7519532 |
Transcoding EVRC to G.729ab
Transcoding from EVRC to G.729ab with LSP parameters interpolated from EVRC to G.729ab, EVRC pitch used as input to G.729ab closed-loop pitch search, and G.729ab fixed codebook pulses found from a...
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7516064 |
Adaptive hybrid transform for signal analysis and synthesis
Analysis and synthesis filter banks such as those used in audio and video coding systems are each implemented by a hybrid transform that comprises a primary transform in cascade with one or more...
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7512536 |
Efficient filter bank computation for audio coding
Low-complexity synthesis filter bank for MPEG audio decoding uses a factoring of the 64×32 matrixing for the inverse-quantized subband coefficients. Factoring into non-standard 4-point discrete...
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RE40691 |
Encoding decoding and compression of audio-type data using reference coefficients located within a band of coefficients
An audio type signal is encoded. The signal is first divided into bands. For each band, a yardstick signal element is selected. The yardstick may be the signal element having the largest magnitude...
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7505897 |
Generalized Lempel-Ziv compression for multimedia signals
The subject matter includes systems, engines, and methods for generalizing a class of Lempel-Ziv algorithms for lossy compression of multimedia. One implementation of the subject matter compresses...
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7500018 |
Efficient in-band signaling for discontinuous transmission and configuration changes in adaptive multi-rate communications systems
Techniques for discontinuous transmission (DTX) and fast in-band signaling of configuration changes and protocol messages in speech communications systems provide cost efficiency in terms of radio...
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