ManageChatDiscover
187951

Hardware Implementation of Continuously Variable Slope Adaptive Delta Modulator.

Article

Last updated: 04 Jan 2025

OverviewSimilar Items

Subjects

-

Tags

Electrical Engineering

Abstract

Adaptive Delta Modulation (ADM) coding is economical method of digitally encoding speech signals. It is a one-bit differential coding scheme which compares the source signal x(t) to an approximate signal xˆ(t) which is then increased or increased by a predetermined step size. This step size is adapted in proportion to the recent average slew rate of the input signal.
For a given average signal slope, there is an optimum step size which will result in the maximum signal-to-quantisation noise ratio (SNR) q , and it is desirable to adapt accordingly.
In this paper, design and implementation of the continuously variable slope adaptive delta modulation (CVSD) are considered. To study the effects of channel errors and data encryption (scrambling) on the performance of the system, a channel simulator, noise generator, and encrypter/decrypter are also design and constructed. Experiments showed that the system provides high quality speech reproduction at bit rates of 32 kbps and ISdẞ SNR on transmission channel.  transmission channel. Moreover, a good quality speech reproduction is obtained at 16 kbps and 20dẞ SNR on transmission channel.
The system reported here may be suitable for secure military communication, in a half-duplex mode, over noise corrupted channels.    

DOI

10.21608/bfemu.2021.187951

Authors

First Name

Fayez

Last Name

Zaki

MiddleName

W.

Affiliation

Electrical Power Engineering Department., Faculty of Engineering., Mu'tah University., Jordan.

Email

fwzaki2017@gmail.com

City

-

Orcid

-

Volume

16

Article Issue

2

Related Issue

27058

Issue Date

1991-12-01

Receive Date

1991-10-10

Publish Date

2021-08-08

Page Start

39

Page End

56

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 16_Issue 2_Pages 39-56.pdf

PDF . 1.1MB

Link

https://bfemu.journals.ekb.eg/article_187951.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=187951

Order

5

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

Hardware Implementation of Continuously Variable Slope Adaptive Delta Modulator.

Details

Type

Article

Created At

22 Jan 2023