Digital Telephony and Network Integration

Keiser, Bernhard E.; Strange, Eugene

doi:10.1007/978-1-4615-1787-0

Cited by 19 publications

(5 citation statements)

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“…Log Spectral Distortion TTSBEDH [9] 13.56 TTSBEPC [10] 11.56 TTSBEUW [11] 7.12 TTSBEUSC [16] 6.67 Proposed method 2.31 4.2.4 Vigour of concealed data AWGN with SNR ranges from 15 to 35 dB is summed up with CLNB signal [29]. The proposed method's robustness is assessed based on BER.…”

Section: Approachmentioning

confidence: 99%

Hybrid Transform Based Speech Band Width Enhancement Using Data Hiding

Koduri¹,

T²

2022

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The limited narrow band (LNB) speech signal spread in the range of 300 to 3400Hz used in public switched telephone networks results in poor-quality telephony speech. Bandwidth extension techniques are performed to expand the frequency range from LNB speech to a clear wideband (CWB) speech signal range of 50Hz-7000Hz over existing public telephone networks. In this paper, a novel robust speech bandwidth extension algorithm by Discrete Wavelet Transform- Discrete Cosine Transform- Based Data Hiding (DWT-DCT-DH) Hybrid transform model was used to spread the out-of-band (3400Hz to 7000Hz) speech frequencies over the LNB speech. In this proposed technique the out-of-band speech frequencies are embedded in LNB speech and imperceptibly spread over the network. These Embedded out-of-band speech frequencies are recovered steadily at the receiver end to generate a restored CWB telephony speech of considerably better quality. The proposed technique simulation results show more intelligible and better-quality telephony speech generated compared to the other bandwidth extension techniques.

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Section: Approachmentioning

confidence: 99%

Hybrid Transform Based Speech Band Width Enhancement Using Data Hiding

Koduri¹,

T²

2022

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“…AWGN with a signal to noise ratio ranges between 15 and 35 dB [28] is added to the CNAB signal. The evaluation of the robustness of the proposed technique is done by utilizing MSE and is calculated using the formula…”

Section: Robustness Of Hidden Informationmentioning

confidence: 99%

DWT-DCT-Based Data Hiding for Speech Bandwidth Extension

Koduri¹,

Kumar²

2021

RADIOENGINEERING

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The limited narrowband frequency range, about 300-3400Hz, used in telephone network channels results in less intelligible and poor-quality telephony speech. To address this drawback, a novel robust speech bandwidth extension using Discrete Wavelet Transform-Discrete Cosine Transform Based Data Hiding is proposed. In this technique, the missing speech information is embedded in the narrowband speech signal. The embedded missing speech information is recovered steadily at the receiver end to generate a wideband speech of considerably better quality. The robustness of the proposed method to quantization and channel noises is confirmed by the mean square error test. The enhancement in the quality of reconstructed wideband speech of the proposed method over conventional methods is reasserted by subjective listening and objective tests.

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“…The effect of noise corruption is considered now. AWGN is added to the CNB signal Y 1 nb (n), with the signal to noise ratio (SNR) ranging from 15 to 35 dB [26]. The robustness of the proposed technique is evaluated using BER.…”

Section: Robustness Of Hidden Informationmentioning

confidence: 99%

Speech Bandwidth Extension Using DWT-FFT-Based Data Hiding

Kurada¹,

Maruvada²,

Sanagapallea³

2020

RADIOENGINEERING

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A novel transform-domain speech bandwidth extension algorithm is proposed to transmit information about the missing speech frequencies over a hidden channel, i.e., the related encoded spectral envelope parameters are hidden within the narrowband speech signal using discrete wavelet transform-fast Fourier transform-based data hiding (DWTFFTBDH) technique. The hidden information is recovered reliably at the receiver to produce a wideband speech signal of much higher quality. Obtained results confirm the excellent reconstructed wideband speech quality of the proposed method over traditional methods.

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Digital Telephony and Network Integration

Cited by 19 publications

References 0 publications

Hybrid Transform Based Speech Band Width Enhancement Using Data Hiding

Hybrid Transform Based Speech Band Width Enhancement Using Data Hiding

DWT-DCT-Based Data Hiding for Speech Bandwidth Extension

Speech Bandwidth Extension Using DWT-FFT-Based Data Hiding

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