Patent application number | Description | Published |
20100312552 | SYSTEMS AND METHODS FOR PREVENTING THE LOSS OF INFORMATION WITHIN A SPEECH FRAME - A method for preventing the loss of information within a speech frame is described. A first speech frame to be encoded is selected. A determination is made as to whether or not a second speech frame is a critical speech frame based on the information within the second speech frame and one or more adjacent speech frames. At least a part of an encoded version of the second speech frame is created according to a selected forward error correction (FEC) mode if the second speech frame is a critical speech frame. The first speech frame and the at least a part of the encoded version of the second speech frame are transmitted. | 12-09-2010 |
20110099004 | DETERMINING AN UPPERBAND SIGNAL FROM A NARROWBAND SIGNAL - A method for determining an upperband speech signal from a narrowband speech signal is disclosed. A list of narrowband line spectral frequencies (LSFs) is determined from the narrowband speech signal. A first pair of adjacent narrowband LSFs that have a lower difference between them than every other pair of adjacent narrowband LSFs in the list is determined. A first feature that is a mean of the first pair of adjacent narrowband LSFs is determined. Upperband LSFs are determined based on at least the first feature using codebook mapping. | 04-28-2011 |
20110295598 | SYSTEMS, METHODS, APPARATUS, AND COMPUTER PROGRAM PRODUCTS FOR WIDEBAND SPEECH CODING - Methods of audio coding are described in which an excitation signal for a first frequency band of the audio signal is used to calculate an excitation signal for a second frequency band of the audio signal that is separated from the first frequency band. | 12-01-2011 |
20120039414 | USING QUANTIZED PREDICTION MEMORY DURING FAST RECOVERY CODING - A method for quantizing prediction memory during fast recovery coding is disclosed. A best shape vector that describes prediction memory for a current frame is quantized. It is determined whether to send the quantized best shape vector. The quantized best shape vector is sent based on the determination. An encoded current frame is sent. | 02-16-2012 |
20120203555 | DEVICES FOR ENCODING AND DECODING A WATERMARKED SIGNAL - An electronic device configured for encoding a watermarked signal is described. The electronic device includes modeler circuitry. The modeler circuitry determines parameters based on a first signal and a first-pass coded signal. The electronic device also includes coder circuitry coupled to the modeler circuitry. The coder circuitry performs a first-pass coding on a second signal to obtain the first-pass coded signal and performs a second-pass coding based on the parameters to obtain a watermarked signal. | 08-09-2012 |
20120203556 | DEVICES FOR ENCODING AND DETECTING A WATERMARKED SIGNAL - A method for decoding a signal on an electronic device is described. The method includes receiving a signal. The method also includes extracting a bitstream from the signal. The method further includes performing watermark error checking on the bitstream for multiple frames. The method additionally includes determining whether watermark data is detected based on the watermark error checking. The method also includes decoding the bitstream to obtain a decoded second signal if the watermark data is not detected. | 08-09-2012 |
20120203561 | DEVICES FOR ADAPTIVELY ENCODING AND DECODING A WATERMARKED SIGNAL - An electronic device configured for adaptively encoding a watermarked signal is described. The electronic device includes modeler circuitry that determines watermark data based on a first signal. The electronic device also includes coder circuitry coupled to the modeler circuitry. The coder circuitry determines a low priority portion of a second signal and embeds the watermark data into the low priority portion of the second signal to produce a watermarked second signal. | 08-09-2012 |
20130185062 | SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR CRITICALITY THRESHOLD CONTROL - Systems, methods, and apparatus as disclosed herein may be implemented to adjust criticality thresholds for speech frames, based on channel conditions. Such a threshold may be used to control retransmission frequency in response to changes in channel state. | 07-18-2013 |
20130185084 | SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR BIT ALLOCATION FOR REDUNDANT TRANSMISSION - Compressibility-based reallocation of initial bit allocations for frames of an audio signal is described. Applications to redundancy-based retransmission of critical frames (e.g., for fixed-bit-rate modes of speech codec operation) are also described. | 07-18-2013 |
20140233404 | APPLYING ERROR RESILIENCY BASED ON SPEED - A method for applying error resiliency based on speed is disclosed. A speed of the wireless communication device is detected. Source-based error resiliency is dynamically applied to a signal based on the speed. The signal is sent on an uplink. In addition to the speed, the source-based error resiliency may be dynamically applied to the signal based on a characteristic of the signal. | 08-21-2014 |
20140233716 | TELECONFERENCING USING STEGANOGRAPHICALLY-EMBEDDED AUDIO DATA - A multi-party control unit (MCU) generates, based on audio data streams that represent sounds associated terminal devices, a mixed audio data stream. In addition, the MCU modifies the mixed mono audio data to steganographically embed sub-streams that include representations of the mono audio data streams. A terminal device receives the modified mixed audio data stream. When the terminal device is configured for stereo playback, the terminal device performs an inverse steganographic process to extract, from the mixed audio data stream, the sub-streams. The terminal device generates and outputs multi-channel audio data based on the extracted sub-streams and the mixed audio data stream. When the terminal device is not configured for stereo playback, the terminal device outputs sound based on the mixed audio data stream without extracting the embedded sub-streams. | 08-21-2014 |