Patent application number | Description | Published |
20100250244 | ENCODER AND DECODER - There is provided an encoder capable of improving inter-channel prediction (ICP) performance in scalable stereo sound encoding using an ICP. In the encoder, ICP analysis units ( | 09-30-2010 |
20110046946 | ENCODER, DECODER, AND THE METHODS THEREFOR - Provided is an encoder which can decode a high-quality stereo signal while keeping the amount of information in the bit allocation information to a minimum when a scalable coding technique is used for a stereo signal. In the encoder, a principal component analysis (PCA) converter ( | 02-24-2011 |
20110288872 | STEREO ACOUSTIC SIGNAL ENCODING APPARATUS, STEREO ACOUSTIC SIGNAL DECODING APPARATUS, AND METHODS FOR THE SAME - Disclosed is a stereo acoustic signal encoding apparatus in which the signal quality does not deteriorate if there are a plurality of sound sources. A peak tracing unit ( | 11-24-2011 |
20120215526 | ENCODER, DECODER AND METHODS THEREOF - An encoder whereby the bit efficiency of encoding can be improved, thereby improving the qualities of signals as decoded. In the encoder: a time-frequency converting unit ( | 08-23-2012 |
20120259622 | AUDIO ENCODING DEVICE AND AUDIO ENCODING METHOD - Disclosed is an audio encoding device which removes unnecessary inter-channel parameters from the subject to be encoded, improving the encoding efficiency thereby. In this audio encoding device, a principal component analysis unit ( | 10-11-2012 |
20130030796 | AUDIO ENCODING APPARATUS AND AUDIO ENCODING METHOD - An audio encoding apparatus that allows a decoded signal exhibiting an excellent sound quality to be obtained on a decoding side. In the audio encoding apparatus ( | 01-31-2013 |
20130103394 | DEVICE AND METHOD FOR EFFICIENTLY ENCODING QUANTIZATION PARAMETERS OF SPECTRAL COEFFICIENT CODING - This invention introduces apparatus and methods to efficiently encode the quantization parameters of split multi-rate lattice vector quantization. In this invention, by doing spectral analysis on the split multi-rate vector quantized spectrum, the spectrum is split to null vectors region and non-null vectors region. For the null vectors region, instead of transmitting series of indication for null vectors, an indication of null vectors region and the quantized value of index of the ending vector in the null vectors region (or the number of the null vectors in the null vectors region) are transmitted. The indication of null vectors region can be designed in many ways, the only requirement is the indication should be distinguishable in the decoder side. The ending index or the number of null vectors can be quantized by an adaptively designed codebook. By applying of the invented method, some bits can be saved from the codebook indications. | 04-25-2013 |
20130173275 | AUDIO ENCODING DEVICE AND AUDIO DECODING DEVICE - Provided is an audio encoding device that can suppress degradation of audio quality. Spectral coefficients of synthesized signal from CELP core layer are utilized to fulfill spectral gaps in error signal spectrum coefficients from a transform coding layer. By both spectral coefficients, decoded signal spectral coefficients are generated. The decoded signal spectral coefficients and the input signal spectral coefficients are divided into a plurality of sub bands. In each sub band, the energy of the input signal spectral coefficient corresponding to a zero decoded error signal spectral coefficient is calculated, and the energy of the decoded signal spectral coefficient corresponding to the zero decoding error signal spectral coefficient is calculated, and their energy ratio is calculated and is quantized and transmitted. | 07-04-2013 |
20140114651 | DEVICE AND METHOD FOR EXECUTION OF HUFFMAN CODING - In this invention, the design of the Huffman table can be done offline with a large input sequence database. The range of the quantization indices (or differential indices) for Huffman coding is identified. For each value of range, all the input signal which have the same range will be gathered and the probability distribution of each value of the quantization indices (or differential indices) within the range is calculated. For each value of range, one Huffman table is designed according to the probability. And in order to improve the bits efficiency of the Huffman coding, apparatus and methods to reduce the range of the quantization indices (or differential indices) are also introduced. | 04-24-2014 |
20140249806 | AUDIO ENCODING APPARATUS, AUDIO DECODING APPARATUS, AUDIO ENCODING METHOD, AND AUDIO DECODING METHOD - An audio encoding apparatus capable of reducing the bit rate even if a codebook having a larger codebook number is selected in a split multi-rate lattice vector quantization is provided. Sub-vector determining unit ( | 09-04-2014 |
20150025879 | AUDIO AND SPEECH CODING DEVICE, AUDIO AND SPEECH DECODING DEVICE, METHOD FOR CODING AUDIO AND SPEECH, AND METHOD FOR DECODING AUDIO AND SPEECH - This invention introduces audio/speech encoding apparatus audio/speech decoding apparatus, audio/speech encoding method and audio/speech decoding method to efficiently encode the quantization parameters of split multi-rate lattice vector quantization. In this invention, the position of the sub-vector whose codebook indication consumes the most bits is firstly located, and then the value of the codebook is estimated based on the total number of bits available and the bits usage information for other sub-vectors. The difference value is calculated between the actual value and estimated value. Finally, instead of transmitting the codebook indication which consumes the most bits, the position of the sub-vector whose codebook indication consumes the most bits and the difference value between the actual value and the estimated value are transmitted. By applying of the invented method, bits can be saved by the codebook indications. | 01-22-2015 |