TY - JOUR ID - TI - Improved Slant and Walsh-Hadamard transforms for audio signals using watermarking as application with comparison to DCT, DWT, FWHT, LWT and Wav-Decomposition تطوير محولات Slant,Walsh-Hadamard للملفات الصوتية واستخدامها في تطبيقات العلامة المائية, مع مقارنة بين الانواع المطورة وانواع اخرى مثل DCT,DWT,HWHT,LWT,wav-dec AU - Hala B. Abdul Wahab AU - Abdul-Mohssen J. Abdul-Hossen1 AU - Sana Ahmed Kadhom² PY - 2017 VL - IS - 1 SP - 95 EP - 106 JO - Journal of College of Education مجلة كلية التربية SN - 18130380 AB - Audio signals are transmitted and recorded in time (or spatial) domain, transformed to frequency domain when compressed, watermarked or encrypted. The transformation is done by using some form of transform like Discrete cosine transform(DCT), Fast Fourier transform(FFT), Discrete wavelet transform( DWT), Fast Walsh Hadamard transform(FWHT) and many others. Slant transform(SLT) was mainly produced and used for images; it was proved that Slant had better performance measurements than Walsh-Hadamard transform, although they have many common characteristics, SLT has fast and simple computations ; In this paper a modified Slant transform that has the ability to work efficiently with audio files and modified WHT were introduced. The modified and other transforms were used especially in audio watermarking as one of the most important applications on both ‘transforms and audio’. The new improvements were tested on many audio files and compared to other transformers using SNR, BER, Time and other metrics.

يتم تسجيل الصوت في المجال الزمني ويتم تحويله الى المجال الترددي في حالات معينة كالضغط والاخفاء والترميز باستخدام المحولات. وهناك انوع محولات عديدة معروفة ومستخدمة. يهدف البحث الى تطوير نوعين من المحولات ومقارنتها مع الانواع المعروفة من عدة نواحي وتطبيقها على اخفاء علامة مائية داخل الملف الصوتي ER -