Effect Of Using Window Type On Time Scale Modification On Voice Recording Using Waveform Similarity Overlap and Add

Saputri, Nanda; Suprapto, Yoyon K.; Wulandari, Diah Puspito

doi:10.1109/isitia.2018.8711203

Cited by 1 publication

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“…Since speech frame 4 cannot be recovered using the FEC mechanism, the WSOLA mechanism will stretch the surrounding frames (3 and 5) to fill the gap. The WSOLA implementation is explained as follows [23,30,32]:…”

Section: Implementing the Wsola Plc In Our Proposed Fec Schemementioning

confidence: 99%

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Enhanced forward error correction scheme in ACELP based codec for voice over IP network services

Gueham

Merazka

2022

Preprint

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Forward Error Correction (FEC) is a packet loss concealment (PLC) mechanism used to recover lost packets via the transmission of a set of redundant packets along with the original ones. Given its performance in improving the end-to-end error recovery capability of lossy networks as well as maximizing the end-to-end quality of service (QoS), FEC is usually considered to be an interesting choice for real-time applications like voice over Internet protocol (VoIP). Note that this mechanism has a low efficiency against consecutive packet losses, which heavily affects the perceptual speech quality in a VoIP environment and could even produce a total desynchronization between the coder and the decoder. The objective of this paper is to introduce a new FEC scheme that can address the aforementioned issue. We use also a Time Scale Modification (TSM) procedure that enhance the performance of our proposed FEC scheme in order to further improve the performance of our scheme under severe network conditions. Subjective and objective evaluation metrics are used to evaluate the efficiency of the proposed method. Results show that the new FEC method achieves a Perceptual evaluation of speech quality (PESQ) value exceeding 3.5 at a 10% frame erasure rate with a noticeable enhancement in voice perception.

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Section: Implementing the Wsola Plc In Our Proposed Fec Schemementioning

confidence: 99%

“…This method allows smooth phase transitions and minimizes the pitch discontinuities in both sides of the speech PL. However, this technique is unable to reproduce speech signals with the same time scale precision due to ambiguities in replication/deletion of pitch periods (known as transient doubling or stuttering) [30,31].…”

Section: Introductionmentioning

confidence: 99%

Enhanced forward error correction scheme in ACELP based codec for voice over IP network services

Gueham

Merazka

2022

Preprint

View full text Add to dashboard Cite

show abstract

Effect Of Using Window Type On Time Scale Modification On Voice Recording Using Waveform Similarity Overlap and Add

Cited by 1 publication

References 0 publications

Enhanced forward error correction scheme in ACELP based codec for voice over IP network services

Enhanced forward error correction scheme in ACELP based codec for voice over IP network services

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