Signaling of scene information in coded bitstreams was proposed by the authors and adopted into t... more Signaling of scene information in coded bitstreams was proposed by the authors and adopted into the emerging video coding standard H.264 (also known as MPEG-4 part 10 or AVC) as a supplemental enhancement information (SEI) message. This paper proposes some improved error concealment methods for intra coded pictures and scene transition pictures using the signaled scene information. Simulation results show that the proposed methods outperform conventional techniques significantly.
Associatiung a plurality of similar reference frames with a predicted frame
A method of encoding a video signal representing a sequence of pictures, the method comprising re... more A method of encoding a video signal representing a sequence of pictures, the method comprising receiving a current picture for encoding, forming a temporal prediction of the current picture from a default reference picture for the current picture, comparing the default reference picture with at least one further reference picture, calculating a measure of the similarity between the default reference picture and each further reference picture and, if the measure of similarity meets a pre-determined criterion, outputting an indicator identifying the further reference picture and associating the indicator with the temporal prediction of the current frame.
Signaling of scene information in coded bitstreams was proposed by the authors and adopted into t... more Signaling of scene information in coded bitstreams was proposed by the authors and adopted into the emerging video coding standard H.264 (also known as MPEG-4 part 10 or AVC) as a supplemental enhancement information (SEI) message. This paper proposes some improved error concealment methods for intra coded pictures and scene transition pictures using the signaled scene information. Simulation results show that the proposed methods outperform conventional techniques significantly.
The last generation video compression techniques such as MPEG-4 and H.263+, allow presence of sho... more The last generation video compression techniques such as MPEG-4 and H.263+, allow presence of shot-cut detection methods that are usually built into the encoders. Such methods are used to extract key-frames to be encoded as intra frames. This paper presents automated scene change detection techniques, which mainly work over these key-frames to extract scene frames. Proposed techniques aim at unsupervised or semi-automatic scene detection schemes. Preliminary results show that the proposed framework provides near optimal scene frames suitable for video summarization by choosing semantically important key-frames as the scene frames. 1.
MUVIS is a series of CBIR systems. The first one has been developed in late 90s to support indexi... more MUVIS is a series of CBIR systems. The first one has been developed in late 90s to support indexing and retrieval in large image databases using visual and semantic features such as color, texture and shape. During recent years, MUVIS has been reformed to become a PC-based framework, which supports indexing, browsing and querying of various multimedia types such as audio, video, audio/video interlaced and several image formats. MUVIS system allows real-time audio and video capturing, encoding by last generation ...
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Papers by Kerem Caglar