Showing papers by "Masayuki Nishiguchi published in 2004"

Signal processor and its method

Abstract: PROBLEM TO BE SOLVED: To provide a signal processor for effectively transmitting the information regarding a calculated excitation degree to the user, and to provide its method. SOLUTION: In a video recording/playback device 1, an inputted video or audio signal is recorded on a recording section 121. By an excitation degree calculating section 122, the video or audio signal from the recording section 121 is acquired to calculate the excitation degree, and the calculated excitation degree is recorded on the recording section 121. By a video synthesizing section 123, the video or audio signal and the excitation degree are acquired from the recording section 121, and an excitation degree graph showing the temporal transition of the excitation degree is outputted e.g. by transparently or substitutionally synthesizing it to the video signal. The outputted video or audio signal is displayed on a display device not shown in Figure. COPYRIGHT: (C)2006,JPO&NCIPI

Data processing device, encoding device, encoding method, decoding device decoding method, and program

Abstract: The present invention relates to a data processing apparatus, a method and apparatus for encoding, a method and apparatus for decoding, and a program, that allow a reduction in an algorithm delay. An interpolator 51 produces interpolated PCM data by performing R-times oversampling on original PCM data. A frame encoder 54 fetches a predetermined number of samples of the oversampled data as one frame, encodes the oversampled data on a frame-by-frame basis, and outputs resultant encoded data. A frame decoder 55 decodes the encoded data on a frame-by-frame basis at a rate R times higher than a predetermined normal rate. A decimator 56 decimates data obtained as a result of the decoding such that the number of samples is reduced to 1/R of the number of sampled included in the original data. The present invention is applicable, for example, to an IP telephone system.

Device and method for sound signal processing, device and method for signal recording, and program

Abstract: PROBLEM TO BE SOLVED: To detect a climax part from a sound signal of an event, etc., with high precision, and to add an index to the climax part. SOLUTION: In a sound signal processor 10, a candidate section extraction part 13 regards as a candidate section a section whose section length where a short-time amplitude calculated by an amplitude calculation part 11 exceeds an amplitude threshold exceeds a time threshold. Further, a feature extraction part 14 extracts a sound quality feature quantity relating to sound quality from a sound signal and quantifies the sound quality characteristic of a climax part. A candidate section evaluation part 15 calculates a score value representing the extent of a climax by using feature quantities relating to an amplitude and sound quality and detects a real climax part according to the score value. Then an index generation part 16 generates and outputs an index including the start position and end position of the climax section and the score value. COPYRIGHT: (C)2004,JPO&NCIPI

Data processing apparatus, encoding apparatus and method, decoding apparatus and method, and program

Abstract: PROBLEM TO BE SOLVED: To decrease algorithm delay without changing a frame length. SOLUTION: An interpolation part 51 interpolates PCM data and performs R-fold over-sampling of the source PCM data. An encoded frame processing part 54 encodes data of a frame unit with the predetermined sample number of data after over-sampling as one frame in the R-times frequency of a predetermined reference processing frequency and outputs encoded data. On the other hand, a decoded frame processing part 55 decodes the encoded data of the frame unit in the R-times frequency of the predetermined reference processing frequency, and a thinning part 56 thins output data resulting from decoding into data with the original 1/R-times sample number. The present invention may be applied to an IP telephone system or the like, for example. COPYRIGHT: (C)2005,JPO&NCIPI