The global migration of television (TV) from analogue to digital broadcasting will result in more spectrum bands (known as TV white space), previously used in analogue broadcasting, becoming available and unoccupied. A question is on how much white space is available and how can it be used opportunistically and dynamically without causing harmful interference to licensed users? In this paper, w...

This paper describes the development of the cu-con system which participated in the 1996 ARPA Hub 4 Evaluations. The system is based on Abbot, a hybrid connec-tionist-HMM large vocabulary continuous speech recognition system developed at the Cambridge University Engineering Department 4]. The Hub 4 Evaluation task involves the transcription of broadcast television and radio news programmes. Thi...

Transcription of broadcast news shows (radio and television) is a major step in developing automatic tools for indexation and retrieval of the vast amounts of information generated on a daily basis. Broadcast shows are challenging to transcribe as they consist of a continuous data stream with segments of different linguistic and acoustic natures. Transcribing such data requires addressing two m...

The home of the future will have an all-digital network for all media, backed by multi-terabyte storage. Users will be able keep an entire lifetime of personal media, and vast collections of media that may be of interest for future viewing, reading, or listening. MyLifeBits is a personal store for a digital life, designed to support efficient organization, search, browsing, annotation, and view...

| Spectrum sensing is the very task upon which the entire operation of cognitive radio rests. For cognitive radio to fulfill the potential it offers to solve the spectrum underutilization problem and do so in a reliable and computationally feasible manner, we require a spectrum sensor that detects spectrum holes (i.e., underutilized subbands of the radio spectrum), provides high spectral-resolu...