If a dialog system can respond to a user as naturally as a human, the interaction will be smoother. In this research, we aim to develop a dialog system by emulating the human behavior in a chat-like dialog. In this paper, we developed a dialog system which could generate chat-like responses and their timing using a decision tree. The system could perform “collaborative completion,” “aizuchi” (b...

A telescope consisting of three silicon microstrip detectors has been tested in a. high energy positron beam at SLAC. Each detector has strips with 25 micron pitch and is read out by two 128-channel NMOS integrated circuits (“Microplex”). Results on the signal-to-noise ratio, spatial resolution, and two-track separation are given. Presented at the Fourth European Symposium on Semiconductor Dete...

This paper describes our new Mixed Excitation Linear Predictive (MELP) coder designed for very low bit rate applications. This new coder, through algorithmic improvements and enhanced quantization techniques, produces better speech quality at 1.7 kb/s than the new U.S. Federal Standard MELP coder at 2.4 kb/s. Key features of the coder are an improved pitch estimation algorithm and a Line Spectr...

This keynote presentation is about the various dynamic aspects of speech (energy envelope, spectral variation, voicing and pitch variation, speaking style and pronunciation variation, and influence of communication channel). The related speech signal characteristics are measured and modeled and are tested in listening experiments. Consequences for speech recognition and speech synthesis are dis...

We present an auditory inspired frequency selective extension to the multiband position-pitch (MPoPi) algorithm and a new particle filtering algorithm for localization and tracking of an arbitrary number of concurrent speakers. In the particle filtering framework, we combine standard bootstrap with importance sampling techniques. The proposed algorithm was tested on real-world recordings using ...

In this paper, a polyphonic pitch detection approach is presented, which is based on the iterative analysis of the autocorrelation function. The idea of a two-channel front-end with periodicity estimation by using the autocorrelation is inspired by an algorithm from Tolonen and Karjalainen. However, the analysis of the periodicity in the summary autocorrelation function is enhanced with a more ...

Epoch detection plays an increasing role in speech processing. For this purpose pitch marking algorithms (PMAs) working accurately in various environments are needed. To push development of PMAs a suited framework for evaluation is needed. In this paper criteria describing the performance of PMAs are proposed and two databases which allow to evaluate the PMAs, are presented. On the basis of a n...

This paper deals with cross talk cancellation for high density optical recording. The data density can be increased reducing the track pitch, as long as cross talk is kept under control. To cope with interference from adjacent tracks, we propose and analyze an adaptive nonlinear cross talk canceller based on a three spot detection system. The optical channel is accurately modeled by a two-dimen...

The traditional three-loop autopilot[11] suffers from coupling in pitch, yaws, roll channel as well as degraded performance due to huge aerodynamic uncertainties. Sliding mode control is applied to design autopilot for skid-to-turn missile (STT) missile systems to overcome the above stated difficulties. The design has two steps. The first step involves feedback linearization and the second stag...

The principles of the most recent cochlear implant processors are similar to that of the channel vocoder, originally used for transmitting speech over telephone lines with much less bandwidth than that required for transmitting the unprocessed speech signal. An overview of the various vocoder-centric processing strategies proposed for cochlear implants since the late 1990s is provided including...