5 papers
Daala: A Perceptually-Driven Still Picture Codec
Jean-Marc Valin, Nathan E. Egge, Thomas Daede +2
Daala is a new royalty-free video codec based on perceptually-driven coding techniques. We explore using its keyframe format for still picture coding and show how it has improved o…
Improved Noise Weighting in CELP Coding of Speech - Applying the Vorbis Psychoacoustic Model To Speex
Jean-Marc Valin, Christopher Montgomery
One key aspect of the CELP algorithm is that it shapes the coding noise using a simple, yet effective, weighting filter. In this paper, we improve the noise shaping of CELP using a…
Low-Complexity Iterative Sinusoidal Parameter Estimation
Jean-Marc Valin, Daniel V. Smith, Christopher Montgomery +1
Sinusoidal parameter estimation is a computationally-intensive task, which can pose problems for real-time implementations. In this paper, we propose a low-complexity iterative met…
An Iterative Linearised Solution to the Sinusoidal Parameter Estimation Problem
Jean-Marc Valin, Daniel V. Smith, Christopher Montgomery +1
Signal processing applications use sinusoidal modelling for speech synthesis, speech coding, and audio coding. Estimation of the model parameters involves non-linear optimisation m…
A High-Quality Speech and Audio Codec With Less Than 10 ms Delay
Jean-Marc Valin, Timothy B. Terriberry, Christopher Montgomery +1
With increasing quality requirements for multimedia communications, audio codecs must maintain both high quality and low delay. Typically, audio codecs offer either low delay or hi…