§16§The Pacific-Rim Conference on Multimedia (PCM) was held in Hong Kong, at the City University of Hong Kong, during December 11-14, 2007. Started in 2000, PCM has been held in various places around the Pacific Rim, including Sydney, Beijing, Hsinchu, Singapore, Tokyo, Jeju, and Zhejiang in chronological order. PCM is a major annual international conference organized as a forum for the dissemination of state-of-the-art technological advances and research results in the fields of theoretical, experimental, and applied multimedia analysis and processing. PCM 2007 was organized into 5 different tracks with a total of 247 submissions from 26 countries and regions including Australia, Belgium, Canada, China, Japan, Korea, New Zealand, Singapore, Spain, Taiwan, the UK and the USA. Among the five tracks, "multimedia analysis and retrieval" received the most number of submissions (34% of the submissions). After a rigorous review process, 73 papers were accepted for oral presentations, giving §16§ an acceptance rate of under 29% for PCM 2007. In addition, 21 papers were accepted for poster presentations. We would like to thank all the Track Chairs and the reviewers for their timely handling of the paper reviews. We are particularly grateful to Chong-Wah Ngo and his team for their support of the Web-based review system throughout the process. We are also indebted to the Special Sessions Chairs, Qi Tian and Timothy Shih, for the organization of the two special sessions on "The AVS China National Standard" and "Multimedia Information System for Biomedical Research," respectively. §04§Session-1: Image Classification and Retrieval.- Special Session-1: The AVS China National Standard - Technology, Applications and Products.- Session-2: Human Face and Action Recognition.- Session-3: H.264 Video Coding.- Session-4: Video Analysis and Retrieval.- Session-5: Media Security and DRM.- Best Paper Session.- Session-6: Audio, Speech and Sound Processing.- Session-7: Digital Watermarking.- Poster Session.- Special Session-2: Multimedia Information Systems for Biomedical Research.- Session-8: Media Delivery.- Session-9: Video Communication and Systems.- Session-10: Video Compression and Processing.- Session-11: Face and 3D Model Analysis.- Session-12: Multimedia Applications.- Session-13: Image Indexing, Identification and Processing.- Session-14: Multimedia Processing. §04§onvolution Ensembles.- Session-5: Media Security and DRM.- A Hybrid Content-Based Image Authentication Scheme.- Implementing DRM over Peer-to-Peer Networks with Broadcast Encryption.- A New Video Encryption Scheme for H.264/AVC.- Best Paper Session.- Tattoo-ID: Automatic Tattoo Image Retrieval for Suspect and Victim Identification.- Auto-Annotation of Paintings Using Social Annotations, Domain Ontology and Transductive Inference.- Value Combination Technique for Image Authentication.- A Novel Multiple Description Approach to Predictive Video Coding.- Video Multicast over Wireless Ad Hoc Networks Using Distributed Optimization.- Session-6: Audio, Speech and Sound Processing.- Acoustic Features for Estimation of Perceptional Similarity.- Modeling Uncertain Speech Sequences Using Type-2 Fuzzy Hidden Markov Models.- A New Adaptation Method for Speaker-Model Creation in High-Level Speaker Verification.- Dynamic Sound Rendering Based on Ray-Caching.- Session-7: Digital Watermarking.- Sp §04§read-Spectrum Watermark by Synthesizing Texture.- Design of Secure Watermarking Scheme for Watermarking Protocol.- Digital Watermarking Based on Stochastic Resonance Signal Processor.- A DWT Blind Image Watermarking Strategy with Secret Sharing.- Poster Session.- Using Enhanced Shape Distributions to Compare CAD Models.- Wavelet-Based Salient Region Extraction.- Color-Based Text Extraction for the Image.- Text Segmentation in Complex Background Based on Color and Scale Information of Character Strokes.- Design of a Decentralized Video-on-Demand System with Cooperative Clients in Multicast Environment.- Low Computing Loop Filter Using Coded Block Pattern and Quantization Index for H .264 Video Coding Standard.- A Low Complexity Block-Based Video De-interlacing Algorithm for SIMD Processors.- Fast Normalized Cross Correlation Based on Adaptive Multilevel Winner Update.- Hierarchical Intra-mode Restriction Technique in H.264/MPEG4-AVC Video.- A Fast Global Motion Estimation
