Robust speech coding with EVS

Rämö, Anssi; Vasilache, Adriana; Toukomaa, Henri

doi:10.1109/globalsip.2015.7418302

Cited by 3 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As explicitly stated in the Abstract, the algebraic code-excited linear-prediction (ACELP)-based speech coding technique [1][2][3][4][5][6] has the double advantage of low bit rate and high speech quality. Accordingly, it is most widely used in speech communication systems, and adopted in many speech codec standards, such as G.723.1, G.729 [1] in International Telecommunication Union (ITU), adaptive multi-rate narrowband (AMR-NB) [2] and wideband (AMR-WB) [3], and in the codec for enhanced voice services (EVS) [4,5] in the 3rd Generation Partnership Project (3GPP).…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, it is most widely used in speech communication systems, and adopted in many speech codec standards, such as G.723.1, G.729 [1] in International Telecommunication Union (ITU), adaptive multi-rate narrowband (AMR-NB) [2] and wideband (AMR-WB) [3], and in the codec for enhanced voice services (EVS) [4,5] in the 3rd Generation Partnership Project (3GPP). Among such standards, the AMR-WB speech codec with a 16 kHz sampling rate is applied to modern mobile communication systems as a way to improve the speech quality in handheld devices, e.g., smartphones.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Search Complexity Improvement of Vector Quantization to Immittance Spectral Frequency Coefficients in AMR-WB Speech Codec

2016

View full text Add to dashboard Cite

An adaptive multi-rate wideband (AMR-WB) code is a speech codec developed on the basis of an algebraic code-excited linear-prediction (ACELP) coding technique, and has a double advantage of low bit rates and high speech quality. This coding technique is widely used in modern mobile communication systems for a high speech quality in handheld devices. However, a major disadvantage is that a vector quantization (VQ) of immittance spectral frequency (ISF) coefficients occupies a significant computational load in the AMR-WB encoder. Hence, this paper presents a triangular inequality elimination (TIE) algorithm combined with a dynamic mechanism and an intersection mechanism, abbreviated as the DI-TIE algorithm, to remarkably improve the complexity of ISF coefficient quantization in the AMR-WB speech codec. Both mechanisms are designed in a way that recursively enhances the performance of the TIE algorithm. At the end of this work, this proposal is experimentally validated as a superior search algorithm relative to a conventional TIE, a multiple TIE (MTIE), and an equal-average equal-variance equal-norm nearest neighbor search (EEENNS) approach. With a full search algorithm as a benchmark for search load comparison, this work provides a search load reduction above 77%, a figure far beyond 36% in the TIE, 49% in the MTIE, and 68% in the EEENNS approach.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Search Complexity Improvement of Vector Quantization to Immittance Spectral Frequency Coefficients in AMR-WB Speech Codec

2016

View full text Add to dashboard Cite

show abstract

Evaluation of EVS, AMR-WB and AMR-NB Codecs Under Different Background Noise Scenarios

Clarke,

Keklikkoca,

Ozyurek

et al. 2023

2023 13th International Conference on Information Science and Technology (ICIST)

View full text Add to dashboard Cite

EVS Channel Aware Mode Robustness to Frame Erasures

Rämö

Kurittu²,

Toukomaa

2016

Interspeech 2016

Self Cite

View full text Add to dashboard Cite

This paper discusses the voice and audio quality characteristics of the EVS, the recently standardized 3GPP Enhanced Voice Services codec. Especially frame erasure conditions with and without channel aware mode were evaluated. The test consisted of two extended range MOS listening tests. The tests contained both clean and noisy speech in clean channel as well as with four frame erasure rates (5%, 10%, 20% and 30%) for selected codecs and bitrates. In addition to subjective test results some additional objective results are presented. The results show that EVS channel aware mode performs better than EVS native mode in high FER rates. For comparison also AMR, AMR-WB and Opus codecs were included to the listening tests.

show abstract

Robust speech coding with EVS

Cited by 3 publications

References 14 publications

A Search Complexity Improvement of Vector Quantization to Immittance Spectral Frequency Coefficients in AMR-WB Speech Codec

A Search Complexity Improvement of Vector Quantization to Immittance Spectral Frequency Coefficients in AMR-WB Speech Codec

Evaluation of EVS, AMR-WB and AMR-NB Codecs Under Different Background Noise Scenarios

EVS Channel Aware Mode Robustness to Frame Erasures

Contact Info

Product

Resources

About