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Overview of the EVS codec architecture
TLDR
This paper gives an overview of the underlying architecture as well as the novel technologies in the EVS codec and presents listening test results showing the performance of the new codec in terms of compression and speech/audio quality. Expand
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ITU-T G.729.1: AN 8-32 Kbit/S Scalable Coder Interoperable with G.729 for Wideband Telephony and Voice Over IP
TLDR
This paper describes the scalable coder - G.729 based on three embedded stages: narrowband cascaded CELP coding at 8 and 12 kbit/s, time-domain bandwidth extension (TDBWE) at 14 kbps, and split-band MDCT coding with spherical vector quantization (VQ). Expand
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Bandwidth Extension for Hierarchical Speech and Audio Coding in ITU-T Rec. G.729.1
  • B. Geiser, P. Jax, +5 authors S. Ragot
  • Computer Science
  • IEEE Transactions on Audio, Speech, and Language…
  • 1 November 2007
TLDR
This paper describes a hierarchical speech and audio coding algorithm built on top of a narrowband core codec, which extends the transmitted acoustic bandwidth from the narrowband frequency range (50 Hz-4 kHz) to the widebandfrequency range. Expand
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Low-complexity multi-rate lattice vector quantization with application to wideband TCX speech coding at 32 kbit/s
TLDR
We present a new method, called Voronoi extension, for the design of low-complexity multi-rate lattice vector quantization (VQ). Expand
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Parametric stereo extension of ITU-T G.722 based on a new downmixing scheme
TLDR
We present a novel, frequency-domain stereo to mono downmixing technique, which preserves the energy of spectral components and avoids setting the left or right channel as a phase reference. Expand
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ITU-T EV-VBR: A robust 8-32 kbit/s scalable coder for error prone telecommunications channels
TLDR
This paper presents ITU-T Embedded Variable Bit-Rate (EV-VBR) codec being standardized by Question 9 of Study Group 16 (Q9/16) as a scalable solution for compression of 16 kHz sampled speech and audio signals. Expand
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Standardization of the new 3GPP EVS codec
TLDR
A new codec for Enhanced Voice Services (EVS), the successor of the current mobile HD voice codec AMR-WB, was standardized by the 3rd Generation Partnership Project (3GPP) in September 2014. Expand
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Low complexity LSF quantization for wideband speech coding
State-of-the-art narrowband speech coders operating from 4 to 16 kbit/s are mostly based on the code-excited linear predictive (CELP) model. They achieve a good synthesis quality usually at theExpand
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A low complexity packet loss concealment algorithm for ITU-T G.722
TLDR
This article presents ITU-T G.722 appendix IV which is a packet loss concealment (PLC) algorithm recently standardized for G. 722 decoding in the presence of frame erasures. Expand
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Wideband LSF quantization by generalized voronoi codes
TLDR
We present a method for quantizing the wideband line spectrum frequencies with a specific class of near-ellipsoidal lattice codes referred to as “generalized Voronoi codes”. Expand
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