Overview
Enhancement is an Android application developed for educational purposes. This application can be used to illustrate digital signal processing (DSP) methods applied to speech processing in academic institutions or industry. This website is designed to allow users of Enhancement to access resources, information and tutorials to aid in their development.
Enhancement has been specifically designed to coincide with specific classroom and laboratory content for a course in speech processing, it provides a realisation of theoretical content such as the short-time Fourier transform (STFT) in a highly interactive manner. It has been developed to help encourage students and teachers toward the field of digital signal processing, helping to motivate through intuitive interactive content.
Enhancement can be downloaded from the Android market upon its official launch date.
Frame Tool
The Frame analysis tool is apart of the Enhancement application and provides useful information into the short-time Fourier and time domain representations of a speech signal. On this page you will find information on how to use the frame analysis tool.
What is the frame analysis tool?
This tool allows the interpretation of small blocks or slices of the spectrogram both in time and frequency directions, the slice size is the window duration taken from the AMS configuration. If the window duration is changed the time and frequency content in this tool changes.
short time Fourier analysis of a speech signal
How to interpret frame analysis graphs
There are three main components to the frame analysis tool: 1. the time domain of the desired window; 2. The Fourier magnitude spectrum of the desired window; and, 3. the spectrogram (bottom), which is taken from the input speech signal. The AMS configuration, window duration, frame shift and analysis window all have great affects on what is displayed in the frame analysis tool. This is can be used to demonstrate stationarity concerns with a speech signal and windowing methods [1].
How to use the frame analysis tool
This tool is easy to use and only requires you to drag the red cursor across the spectrogram to select the desired frame to view its corresponding time and magnitude graphs. Above and to the right of the spectrogram is the selected frame number and total frame count.
How to view and share frame analysis graphs
Once you choose to view or share in the menu, three images are created. Those three imaged are: 1. short-time magnitude spectrum, 2. time domain graph, and 3. both the magnitude and time graphs. These images are formatted in such away to allow placement directly into academic or educational literature.
These images can be shared through e-mail, bluetooth, social networks and any other supporting applications by pressing:
menu > Share
References
[1] J. Proakis and D. Manolakis, “Digital Signal Processing: Principals,Algorithms, and Applications”. New Jersey, USA: Pearson Prentice Hall, 2007.
Privacy Policy
Your privacy is critically important to us. EnhancementApp.com is owned and operated by DigiPhD, together we have a few fundamental principles:
- We don’t ask you for personal information unless we truly need it. (We can’t stand services that ask you for things like your gender or income level for no apparent reason.)
- We don’t share your personal information with anyone except to comply with the law, develop our products, or protect our rights.
- We don’t store personal information on our servers unless required for the on-going operation of one of our services.
If you have questions about deleting or correcting your personal data please contact DigiPhD on support@digiphd.com.
EnhancementApp.com and Enhancement Android application both adhere to DigiPhD Privacy Policy.