Topic
Adaptive Multi-Rate audio codec
About: Adaptive Multi-Rate audio codec is a research topic. Over the lifetime, 1467 publications have been published within this topic receiving 19736 citations. The topic is also known as: AMR & Adaptive Multi-Rate.
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Papers
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13 May 2002
TL;DR: A rapid and noise-robust CODEC adaptation for cellular phone speech recognition in adverse environment is introduced, where the C ODEC type is automatically determined through the recognition process by comparing likelihoods of COD EC-dependent models.
Abstract: In this paper, we introduce a rapid and noise-robust CODEC adaptation for cellular phone speech recognition in adverse environment. Our proposal is to use CODEC-dependent noise models (CDNM) in addition to CODEC-dependent speech models (CDSM) for reducing speech detection errors caused by the background noise and compensating nonlinear speech distortion due to the low-bitrate CODECs. In this approach, the CODEC type is automatically determined through the recognition process by comparing likelihoods of CODEC-dependent models. Experiments on 3k words recognition of noisy speech showed 25% improvement in accuracy, and 46% reduction in early starting point detection errors over the conventional CODEC-independent approach.
1 citations
12 Dec 2008
TL;DR: This paper proposes an effective MD video codec designed based on motion-compensated correlation of video sequences, which is perfectly compatible with the current standard source or channel codec.
Abstract: Multiple description coding is especially promising for video coding due to the very stringent delay requirement in many video applications. In this paper, an effective MD video codec is designed based on motion-compensated correlation of video sequences, which is perfectly compatible with the current standard source or channel codec. The experimental results exhibit better performance of the proposed scheme than other schemes.
1 citations
Journal Article•
TL;DR: The features and theory of operation of ADV202, the single-chip JPEG2000 codec, are introduced, and the typical applications of ADV 202 are also discussed.
Abstract: The ADV202 is a single-chip JPEG2000 codec of Analog Devices Inc.Patented SURF (spatial ultra-efficient recursive filtering)technology enables it has low power and low cost.In this paper,the features and theory of operation of ADV202 are introduced,and the typical applications of ADV202 are also discussed.
1 citations