Patent application number | Description | Published |
20080297380 | SIGNAL DECODING APPARATUS AND SIGNAL DECODING METHOD - A signal decoding apparatus preventing substantial noise from being produced when transmission error occurs during decoding of scalable-coded information. In this signal decoding apparatus, a coded information operation section ( | 12-04-2008 |
20080298457 | Relay Device and Signal Decoding Device - There is provided a relay device capable of simultaneously transmitting various additional information such as audio information, character information, and image information while suppressing the communication cost and the line use ratio without increasing the calculation cost in the decoding process. The relay device includes an encoded information analysis unit ( | 12-04-2008 |
20090006086 | Signal Decoding Apparatus - A signal decoding apparatus that can suppress any large unusual sounds to provide decoded signals of improved audibility even when the number of hierarchical layers to be used in the decoding process varies due to a packet loss or the like in communication utilizing a scalable encoding/decoding technique. In the signal decoding apparatus, a gain adjusting part ( | 01-01-2009 |
20090016426 | ENCODER, DECODER, AND THEIR METHODS - An encoder generating a decoded signal with an improved quality by scalable encoding by canceling the characteristic inherent to the encoder and causing degradation of quality of the decoded signal. In the encoder, a first encoding section ( | 01-15-2009 |
20090094024 | CODING DEVICE AND CODING METHOD - A coding device is provided with features in which optimum coding in a higher layer is flexibly carried out based on a coding result of a lower layer and a quality audio signal in limited circumstances is served to users. In this coding device, a basic layer coding unit codes an input signal to generate a basic layer information source code and outputs a linear prediction coefficient (LPC) and a quantum LPC, which are parameters calculated at coding, to an expanded layer control unit. A basic layer decoding unit decodes the basic layer information source code. An adding unit reverses a polarity of a basic layer decoded signal, adds the same to the input signal, and calculates a difference signal. The expanded layer control unit generates expanded layer mode information indicative of a coding mode in an expanded layer based on the LPC and the quantum LPC. An expanded layer coding unit codes the difference signal obtained from the adding unit under control of the expanded layer control unit. | 04-09-2009 |
20090171673 | ENCODING APPARATUS AND ENCODING METHOD - It is possible to provide an encoding device and an encoding method capable of realizing encoding with a very small information amount and a very small calculation amount when encoding higher-band spectrum data according to lower-band spectrum data in a wide-band signal. The device and the method can obtain a high-quality decoded signal even if a large quantization distortion is caused in the lower-band spectrum data. In this device, when encoding higher-band spectrum data in a signal to be encoded, according to lower-band spectrum data in the signal, only for apart (a head portion) of the higher-band spectrum data, the lower-band spectrum data after being quantized is subjected to approximate partial search and higher-band spectrum data is generated according to the search result. | 07-02-2009 |
20090198491 | LSP VECTOR QUANTIZATION APPARATUS, LSP VECTOR INVERSE-QUANTIZATION APPARATUS, AND THEIR METHODS - Disclosed is an LPC vector quantization device capable of quantizing an LSP vector by using correlation between divided vectors. The device includes: a vector dividing unit ( | 08-06-2009 |
20100063804 | ADAPTIVE SOUND SOURCE VECTOR QUANTIZATION DEVICE AND ADAPTIVE SOUND SOURCE VECTOR QUANTIZATION METHOD - Provided is an adaptive sound source vector quantization device which can always perform a pitch cycle search with a resolution appropriate for any section of the pitch cycle search range of a second sub-frame when a pitch cycle search range of the second sub-frame changes in accordance with a pitch cycle of a first sub-frame. The device includes a first pitch cycle instruction unit ( | 03-11-2010 |
20100082337 | ADAPTIVE SOUND SOURCE VECTOR QUANTIZATION DEVICE, ADAPTIVE SOUND SOURCE VECTOR INVERSE QUANTIZATION DEVICE, AND METHOD THEREOF - Disclosed is an adaptive sound source vector quantization device capable of improving quantization accuracy of adaptive sound source vector quantization while suppressing increase of the calculation amount in CELP sound encoding which performs encoding in sub-frame unit. In the device, a search adaptive sound source vector generation unit ( | 04-01-2010 |
20100106492 | ADAPTIVE SOUND SOURCE VECTOR QUANTIZATION UNIT AND ADAPTIVE SOUND SOURCE VECTOR QUANTIZATION METHOD - Disclosed is an adaptive sound source vector quantization device capable of reducing deviation of the quantization accuracy of the adaptive sound source vector quantization of each sub-frame when performing an adaptive sound source vector quantization in a sub-frame unit by using a greater information amount in a first sub-frame than in a second sub-frame. In this device: when the device performs the adaptive sound source vector quantization of the first sub-frame, an adaptive sound source vector generation unit ( | 04-29-2010 |
20100185442 | ADAPTIVE SOUND SOURCE VECTOR QUANTIZING DEVICE AND ADAPTIVE SOUND SOURCE VECTOR QUANTIZING METHOD - It is an object to disclose an adaptive sound source vector quantizing device, etc. that can be configured to improve quantizing accuracy in adaptive sound source vector quantization to be carried out for every sub-frame. In this device, a pitch period designating unit ( | 07-22-2010 |
20100274556 | VECTOR QUANTIZER, VECTOR INVERSE QUANTIZER, AND METHODS THEREFOR - Disclosed is a vector quantizer in which, in multistage vector quantization, the vector quantization of the following stage can be performed adaptively to the result of the vector quantization of the preceding stage to improve the accuracy of the quantization at less calculation amount and bit rate. The quantizer comprises a product set circle calculating section ( | 10-28-2010 |
20100284392 | VECTOR QUANTIZER, VECTOR INVERSE QUANTIZER, AND METHODS THEREFOR - Disclosed is a vector quantizer capable of improving the quantization accuracy of vector quantization to switch over the codebook of the vector quantization of a first stage depending on the type of feature having a correlation with a vector to be quantized. In the quantizer, a classifier ( | 11-11-2010 |
20110004469 | VECTOR QUANTIZATION DEVICE, VECTOR INVERSE QUANTIZATION DEVICE, AND METHOD THEREOF - Disclosed are a vector quantization device and others capable of adaptively adjusting a vector space of a code vector for quantization of a second stage by using a quantization result of a first stage and improving the quantization accuracy. In the device, the first quantization unit ( | 01-06-2011 |
20110137661 | QUANTIZING DEVICE, ENCODING DEVICE, QUANTIZING METHOD, AND ENCODING METHOD - A quantizing device for more efficient quantization realized by lessening the computational complexity of quantization of a balance weighting factor. The device includes a power/correlation calculating unit ( | 06-09-2011 |