Abstract. An audio fingerprint is a compact content-based signature that summarizes an audio recording. Audio Fingerprinting technologies have attracted attention since they allow the identification of audio independently of its format and without the need of meta-data or watermark embedding. Other uses of fingerprinting include: integrity verification, watermark support and content-based audio retrieval. The different approaches to fingerprinting have been described with different rationales and terminology: Pattern matching, Multimedia (Music) Information Retrieval or Cryptography (Robust Hashing). In this paper, we review different techniques describing its functional blocks as parts of a common, unified framework.

This paper presents a video watermarking technology for broadcast monitoring. The technology has been developed at the Philips Research Laboratories in Eindhoven in the context of the European ESPRIT project VIVA Visual Identity V eri cation Auditor. The aim of the VIVA project is to investigate and demonstrate a professional broadcast surveillance system. The key technology in the VIVA project is a new video watermarking technique by the name of JAWS Just Another Watermarking System. The JAWS system has been developed such that the embedded watermarks i are invisible, ii are robust with respect to all common processing steps in the broadcast transmission chain, iii have a v ery low probability of false alarms, iv have a large payload at high rate, and v allow for a low complexity and a real-time detection. In this paper we present the basic ingredients of the JAWS technology. We also brie y discuss the performance of JAWS with respect to the requirements of broadcast monitoring.

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