语音图
1.The DSP-ADPCM voice encoder is a new product of the Institute of Image and Graphics of Sichuan University, which is used for collecting and playing voices.
2.The paper introduces features, configuration diagram and the pins of OKI voice chip MSM6588. It also gives an application of the circuit and flow chart for the recording/playing system in which MSM6588 is in micro-controller mode.
3.The acoustic-phonetic analysis of the cleft palate patients with sound spectrograph
4.Objective To study the acoustic - phonetic features of the cleft patients with sound spectrograph.
5.Methods Fundamental Frequency(F 0),Formant,shimmer,jitter,acoustic time-territory waveform and diagram among 26 tracheooesophageal and 32 normal speakers were examined by using USSA and the difference between the two groups were analyzed.
6.Moreover the realization of the IP phone scheme was researched, we mainly discussed the software and hardware design method, the software design was the realization of the speech coding on DSP, the hardware design included the design of the schematic and the printed circuit board (PCB) and the debugging of the hardware.
7.Modern telecommunication networks are going to be a so called Broadband Integrated Services Digital Network (B-ISDN), which can support transmission of multimedia information such as text, image, video, audio.
8.The paper first introduces composing of the equipment and working principle, then makes simple compare for distinctness between digital signal processor (DSP), embedded system and single-chip microcomputer, finally introduces in detail main technical problems that need resolved in design, which including automatic dial-up calling, building of voice channels, on/off- hook control, communication, reliability and anti-interference, design of hardware circuit (attaching with schematic circuits), etc.
9.The results showed:Improving rate of velopharyng eal incompetence (IRVPI) was close to 33.33% after 2.5～3 years therapy. The spectrographic analysis showed aclearer,and darken frequ ency band,normal resonance peaks(F?2,F???3) and seldom appearance of negative value of voice origination time (VOT). The above indicated that pa?tients had achieved adequate velopharyngeal competence (VPC) and good speech habit.
10.The Speech sound input interface of TRS-80 microcomputer is described. The paper presnts the hardware block diagram of single byte DMA mode. In the work of the author, the appropriate amendment has been taken to the unreasonable design of TRS-30 microcomputer hardware.
