Voice recognition equipment

PURPOSE:To reduce the decision error rate of voiced/voiceless misdecisions on an input speech, made by an encoding device of an analytic synthesis system speech encoding system, due to a background noise. CONSTITUTION:A linear predictive analyzer 2 finds a linear prediction coefficient (c) from a signal (b) framed by a framing unit 1 and an LSP coefficient deriving unit 6 converts the linear prediction coefficient (c) into an LSP(linear spectrum couple) coefficient (e); and then its variance is found by an LSP coefficient distance variance calculator 7 and a specific threshold value g2 is supplied to a voiced/voiceless decision unit 8 to securely decide that the background is voiceless. Consequently, the reproduced speech quantity of a receiving and decoding device is improved.

Voiced/voiceless decision making circuit

An auto-correlation value is determined approximately over a cycle with regard to a voice waveform generated from linear PCM data, and a pitch cycle of the voice waveform is extracted on the basis of the auto-correlation value. In the vicinity of a sampled value of an objective voice waveform, the voice waveform from a cycle before the sampled value of the objective voice waveform is used as a predicted waveform to determine the correlation value between the actual voice waveform and the predicted waveform, and a discontinuous point in the actual voice waveform, if any, is detected from the magnitude of the correlation between the predicted waveform and the actual voice waveform. If a discontinuous point is detected, a corrected voice waveform which is similar to the predicted waveform in the vicinity of the discontinuous point and gradually approaches the actual waveform is formed by the interpolation between the predicted waveform and the actual voice waveform.

Voice signal processor

PROBLEM TO BE SOLVED: To provide a blocking method for preventing radiant rays emitted from a radiant ray generation system arranged in a room or a radio active material stored in the room from leaking from a gap 3 present between a wall hole 1 and a pipe 2 to the outside; or to provide a blocking method for preventing noises generated from machine apparatus arranged in the room from leaking from the gap 3 present between the wall hole 1 and the pipe 2 to the outside. SOLUTION: In the blocking method, after a flange 4 is mounted on one wall surface of the wall hole 1 and the inner surface of a cylindrical body 7 formed on the center section of the flange 4 and the surface of the pipe 2 penetrating the wall hole 1 is brought into contact with each other, a lead plate 8 is wound on the surface the pipe 2 located at an end of the cylindrical body 7 of the flange 4, a different lead plate 9 is wound on the surface of the lead plate 8 wound on the pipe 2 and the surface of the cylindrical body 7, the lead plate 9 is formed by winding to riding on respective surfaces of the lead plate 8 wound on the surfaces of the cylindrical body 7 and the pipe 2, and radiant rays or noises generated from the gap 3 present between the wall hole 1 and the pipe 2 in the room are prevented from leaking outside the room. COPYRIGHT: (C)2009,JPO&INPIT

Blocking method for blocking gap present between pipes penetrating wall hole and wall hole

PURPOSE:To reduce a false signal and to suppress the deterioration of picture quality by joining a solid image pickup component to a optical system directly without using sealing glass. CONSTITUTION:Incident light is converged at a lens system 1 and is separated into red light, green light and blue light by a color separation prism 2 through an optical filter 31 and an infrared cutting filter 32. The red light and the green light and the blue light obtained from the prism 2 are converted into electric signals by solid image pickup parts 33, 34 and 35. Here, the solid image pickup parts 33-35 are provided with joining a solid image picking up component to the prism 2 directly without using sealing glass. The electric signals from the image pickup parts 33-35 are supplied to a corresponding signal processing circuits 6-8, respectively. Thus, since a reflecting face such as a sealed glass is not provided between an optical system and the solid image pickup component, a false signal is reduced and the deterioration of picture quality can be suppressed.

Kimura Takahisa

Papers

Continuous word voice recognition system

Voice analysis synthesization system