On comparing speech quality of various narrow- and wideband speech codecs

Rämö, Anssi; Toukomaa, Henri

doi:10.1109/isspa.2005.1581010

Cited by 15 publications

(3 citation statements)

References 2 publications

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“…e memory requirements of the partial Speex port to BelaSigna 300 are presented in Table 3. [28]. In order to evaluate the outcome of the voice codec implementation, a series of tests on the speech quality was performed using ITU-T Perceptual Evaluation of Speech Quality test methodology for automated assessment of the speech quality as experienced by a user of a telephony system [29].…”

Section: Codec Implementationmentioning

confidence: 99%

Embedded Parallelism Enabling Ultralow-Power Zigbee Voice Communications

Μηλιώνης

Touloupis

Perelló

2019

Journal of Computer Networks and Communications

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Short-range wireless technologies are known to transmit voice, audio, image, and video messages in real time. Energy consumption and transmission reach are critical in such networks, especially for portable and power autonomous devices. The purpose of the Voice over Zigbee technology is to provide a competitive offering that excels in these performance aspects. Due to the CSMA-CA mechanism implemented in the 802.15.4 layer, a well-designed strategy must be considered in Zigbee to create a robust, reliable, and full-duplex conversation. In past efforts, we proved that the radio channel of Zigbee has enough bandwidth to support a full-duplex conversation with narrow-band voice codecs. Our embedded implementation of the Speex voice codec targeted the development of a low-cost, ultralow-power, long-range wireless headset using Zigbee technology to transmit voice in full-duplex mode for use with leading PC VoIP programs. Furthermore, we presented the real environment performance evaluation and power consumption tests involving the developed headset prototype. Talk time is comparable to Bluetooth including at the power budget, the codec processing, and analogue audio interface, but its deep-sleep lifetime more than doubles the Bluetooth performance. This was one of the very few successful efforts to port a voice codec on an ultralow-power DSP for use with power sensitive Zigbee applications, which is highly cited in the literature, proving additionally that using an open-source codec can deliver similar voice quality, reducing the total system cost. The current paper elaborates on the embedded parallelism of the Speex implementation and the exploitation of the DSP architectural parallelism which critically enabled the Voice over Zigbee application on the ultralow-power DSP platform. Another significant contribution of this work is towards understanding and resolving the challenges faced when trying to achieve good quality transmission of media over constrained devices and networks. The way to new ultralow-power voice-related Zigbee and constrained network applications is open.

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Section: Codec Implementationmentioning

confidence: 99%

Embedded Parallelism Enabling Ultralow-Power Zigbee Voice Communications

Μηλιώνης

Touloupis

Perelló

2019

Journal of Computer Networks and Communications

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“…In [9] a comparison between narrow and wideband coded speech is presented. The narrowband represents a bandwidth of 300-3400Hz while wideband represents a bandwidth of 50-7000Hz.…”

Section: Limitationmentioning

confidence: 99%

“…In [9] wideband codec is preferred but narrow band codecs gives a much good results which is not discussed here. There is much more maturing is required in these codecs to achieve much better quality.…”

Section: Limitationmentioning

confidence: 99%

A survey on implementation of audio over 802.15.4

Kaur¹,

Gupta²

2017

Int J Recent Sci Res

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ARTICLE INFO ABSTRACTStreaming an audio over wireless networks is gaining very popularity now days. In view of this IEEE 802.15.4 standard is most used protocol for streaming an audio. It is the Wireless Personal Area Network (WPAN) providing low data rate, low power which is need for long battery life. While streaming an audio the most important factor is the available bandwidth, so the speech samples must be compressed. By compressing an audio a lot bandwidth can be saved, this results in the more samples of speech to be sent on the available bandwidth. In this paper we present a survey on the implementation of audio over 802.15.4 by considering different parameters and speech vocoder because of availability of limited bandwidth.

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