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| Number | Title | Issue Date |
| 8190441 | Playback of compressed media files without quantization gaps Playback by a decoder of a lossy compressed digital media file without quantization gaps is disclosed. The digital media file can be formed of a number of audio samples grouped into a corresponding number of audio frames. As a method, one embodiment can be carried o... | 05/29/2012 |
| 8145499 | Generation of decorrelated signals In a case of transient audio input signals, in a multi-channel audio reconstruction, uncorrelated output signals are generated from an audio input signal in that the audio input signal is mixed with a representation of the audio input signal delayed by a delay time ... | 03/27/2012 |
| 7813933 | Method and apparatus for multichannel upmixing and downmixing Loudspeakers in domestic or automotive environments are rarely placed ideally with respect to the sources supplying them, and the stereo and surround images are seldom satisfying. According to the invention there is provided a method and apparatus for combining a pr... | 10/12/2010 |
| 7761304 | Synchronizing parametric coding of spatial audio with externally provided downmix Embodiments of the present invention are directed to a binaural cue coding (BCC) scheme in which an externally provided audio signal (e.g., a studio engineering audio signal) is transmitted, along with derived cue codes, to a receiver instead of an automatically dow... | 07/20/2010 |
| 7409350 | Audio processing method for generating audio stream An audio processing method utilized to generate an audio stream. An audio frame includes N frequency subbands. An Ith frequency subband among the N frequency subbands includes M audio samples and has an Ith psychoacoustic masking value. First, an Ith offset of the I... | 08/05/2008 |
| 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 |
| 7286387 | Reducing the effect of write disturbs in polymer memories The write disturb that occurs in polymer memories may be reduced by writing back data after a read in a fashion which offsets any effect on the polarity of bits in bit lines associated with the addressed bit. For example, each time the data is written back, its pola... | 10/23/2007 |
| 7283591 | Parallelized dynamic Huffman decoder Several code detectors in parallel simultaneously examine varying overlapping segments of a data stream containing variable length codes, referred to as a data window. The data window segments directly address memory structures within each of the code detectors with... | 10/16/2007 |
| 7274738 | System for improving performance of compression and decompression algorithms in a telecommunication system In a telecommunications system, an arithmetic logic unit (ALU) that receives an input signal. The input signal includes a digital signal representative of an analog signal. The ALU selectively performs compression and decompression on the digital signal. The ALU com... | 09/25/2007 |
| 7236839 | Audio decoder with expanded band information An audio processing unit that provides a high-sound-quality reproduction even when a band property of an input encoded signal drops at or below a Nyquist frequency. The audio processing unit has a band-variable bandpass filter 1500; a band determining section... | 06/26/2007 |
| 7225136 | Data compression and expansion of an audio signal A data compression apparatus for data compressing 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 so as to obtain a bitstream signal, a lossless coder (10 | 05/29/2007 |
| 7222068 | Audio signal encoding method combining codes having different frame lengths and data rates A system for transmitting audio signals over a telecommunications link generates the signals as two or more alternative feeds, for example at different data rates. The two feeds are encoded using coding methods having a frame structure with different frame lengths. ... | 05/22/2007 |
| 7209885 | Compressed code generating method and compressed code decompressing method A compressed-code generating method that is used for compressing information on characters including numerical data, sound and images, and a compressed-code expanding method that is used for restoring and expanding the compressed code generated by using the compress... | 04/24/2007 |
| 7203643 | Method and apparatus for transmitting speech activity in distributed voice recognition systems A system and method for transmitting speech activity in a distributed voice recognition system. The distributed voice recognition system includes a local VR engine in a subscriber unit and a server VR engine on a server. The local VR engine comprises an advanced fea... | 04/10/2007 |
| 7127399 | Voice processing method and voice processing device In a voice communication system 1, a gateway server 4 receives IP packets from the Internet, converts PCM voice data in the IP packets into AMR encoded voice data frames, and transmits to a mobile terminal 7. During the propagation to the gatewa... | 10/24/2006 |
| 7099820 | Method and apparatus for concealing jitter buffer expansion and contraction Methods for concealing audible distortions resulting from changes in jitter buffer size include receiving an audio stream, storing the audio stream in a jitter buffer, and determining a pitch period associated with the audio stream. To expand the jitter buffer, a me... | 08/29/2006 |
| 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 |
| 7046808 | Method and apparatus for detecting processing stages applied to a signal A system for determining the amount of processing that has been applied to watermarked signal. A steganographic signal is provided that includes an original signal and an embedded fragile watermark. The fragile watermark is characterized by a low energy and a high r... | 05/16/2006 |
| 7020615 | Method and apparatus for audio coding using transient relocation An improved representation of transients in audio signals comprises modifying transient locations in such a way that a transient can occur only at a beginning of a sinusoidal segment. The modification procedure comprises the steps: detecting a beginning... | 03/28/2006 |
| 7003469 | Audio signal processing apparatus and method thereof A digital audio signal to be replayed is processed in a waveform thereof. A frequency bandwidth of the audio signal is expanded through conversion of a sampling frequency, and then the audio signal is low-pass-filtered with a low-pass cut-off frequency corresponding... | 02/21/2006 |
| 6978371 | Data hiding in digital multimedia A method and system for hiding authentication data within a multimedia data stream provides for cross-authentication. The method includes the step of obtaining a first set of authentication data, where the first set of authentication data is based on data contained ... | 12/20/2005 |
| 6959346 | Method and system for packet encryption A data processor and a method for processing data is disclosed. The processor has an input port for receiving packets of data to be processed. A master controller acts to analyse the packets and to provide a header including a list processes to perform on the packet... | 10/25/2005 |
| 6925340 | Sound reproduction method and sound reproduction apparatus An apparatus and method for recording and reproducing a sound (i.e. audio) signal corresponding to a video signal at a higher than normal speed. The method delimits a sound signal reproduced at a recording medium at a speed higher than a normal speed into successive... | 08/02/2005 |
| 6912315 | Pre-processed information embedding system Auxiliary information (150) representing binary or multi-level (M≧2) logical values is embedded into successive segments (110) of an audio, video or other data signal in response to a user request to download the data signal via an on-line distributo... | 06/28/2005 |
| 6868504 | Interleaved delay line for phase locked and delay locked loops An interleaved delay line for use in phase locked and delay locked loops is comprised of a first portion providing a variable amount of delay substantially independently of process, temperature and voltage (PVT) variations while a second portion, in series with the ... | 03/15/2005 |
| 6792403 | Method and apparatus for compressing and transmitting ultra high speed data Voiceband compression techniques are employed in order to enable an RF telecommunications base station to accommodate data signals of high speed voiceband modems and FAX machines. An Ultra-High Speed Codec supports voiceband modem and FAX transmissions up to 14.4 kb... | 09/14/2004 |
| 6792402 | Method and device for defining table of bit allocation in processing audio signals A method and a device for defining bit allocation table in processing audio signals are provided. The provided method and device can save storage bits and provide light quality as well. In the first step, the total number of bits for storing audio signals is determi... | 09/14/2004 |
| 6782368 | Media processing apparatus that operates at high efficiency A media processing apparatus includes an input/output processing unit that performs input/output processing that is asynchronously caused by external factors and a decode processing unit that operates in parallel with the input/output processing unit and mainly perf... | 08/24/2004 |
| 6741966 | Methods, devices and computer program products for compressing an audio signal A method of compressing an audio signal can include accepting input samples of the audio signal wherein the input samples include non-zero input samples. A logarithm of each of the non-zero input samples of the audio signal can be calculated. Compressed output sampl... | 05/25/2004 |
| 6650762 | Types-based, lossy data embedding A new approach to data embedding within ITU G.722 and ITU G.711 based upon the method of types and universal classification is disclosed. A secondary data sequence is embedded in the original (host) data stream using the method of types. The embedded data... | 11/18/2003 |
| 6601032 | Fast code length search method for MPEG audio encoding A fast code length search method for determining the length of a code in a codebook, wherein the method is especially suited for MPEG-compliant audio encoding. A code length table is created which stores pre-calculated code lengths, including any sign bit... | 07/29/2003 |
| 6584443 | Apparatus and method for audio data/audio-related information transfer A method for transferring audio data and audio-related information includes generating second audio data from first audio data, transmitting second audio data and audio-related information associated with the second audio data, and receiving the second au... | 06/24/2003 |
| 6563869 | Digital signal processing circuit and audio reproducing device using it For a left-channel input audio signal, digital filters 30LL and 30LR are provided for reproduction of impulse responses used for locating an acoustic image outside the head of a listener, and for a right-channel input audio signal, digital filters 30RL an... | 05/13/2003 |
| 6526383 | Method and apparatus for compressing and transmitting high speed data Two related voiceband compression techniques are employed in order to enable an RF telecommunications system to accommodate data signals of high speed voiceband modems and FAX machines. A High Speed Codec enables the telecommunications system to pass voic... | 02/25/2003 |
| 6526385 | System for embedding additional information in audio data A method and a system is provided for embedding and detecting additional information, such as copyright information, in audio data, so that a modification in the sonic quality due to the embedding is imperceptible to human beings, and does not drastically... | 02/25/2003 |
| 6507819 | Sound signal processor for extracting sound signals from a composite digital sound signal A sound signal processing apparatus including extracting means for extracting from a composite sound signal, representing multiple sound sequences, digital sound signals corresponding to a portion of the composite sound signal. Each of the digital sound s... | 01/14/2003 |
| 6493674 | Coded speech decoding system with low computation In a coded speech decoding system, an n-channel time domain speech signal is converted to a frequency domain speech signal. A predetermined weighting adding process is executed on the frequency domain speech signal for each of a plurality of different tra... | 12/10/2002 |
| 6405338 | Unequal error protection for perceptual audio coders An audio information bit stream including audio control bits and audio data bits is processed for transmission in a communication system. The audio data bits are first separated into n classes based on error sensitivity, that is, the impact of errors in p... | 06/11/2002 |
