Search found 17 matches

by Max
Sun Apr 17, 2011 12:31 pm
Forum: Microcontrollers
Topic: 16F877A isn't working with External Oscillator (HI-TECH C)
Replies: 1
Views: 1403

16F877A isn't working with External Oscillator (HI-TECH C)

Hi guys I designed a small circuit with Microchip PIC16F877A micro. Non of the programs compiled with HI-TECH C compiler worked on the unit. I used the same programmer for several other systems. There is not much difference in this circuitry other than the 8MHz crystal oscillator I used. Even a smal...
by Max
Mon Apr 05, 2010 8:33 pm
Forum: Digital Signal Processors
Topic: What is the purpose of cache memory in a DSP application
Replies: 2
Views: 3773

Cache Mapping and Associativity

Your questions are all related to theories in Cache Mapping and Associativity.

See Cache Mapping and Associativity for a detailed explanation.
by Max
Mon Apr 05, 2010 8:31 pm
Forum: Digital Signal Processors
Topic: Cache Mapping and Associativity
Replies: 0
Views: 2330

Cache Mapping and Associativity

A very important factor in determining the effectiveness of the level 2 cache relates to how the cache is mapped to the system memory. What this means in brief is that there are many different ways to allocate the storage in our cache to the memory addresses it serves. Let's take as an example a sys...
by Max
Sat Apr 03, 2010 2:00 am
Forum: Electronics & Electrical Engineering
Topic: Line Isolation Monitor
Replies: 4
Views: 3435

Re: Line Isolation Monitor

A Line Isolation Monitor (LIM) monitors the integrity of an isolated power system. Isolation transformers produce non-grounded power sources. All AC wiring and AC operated electrical devices have the potential for direct resisting capacitance, or inductive leakage currents to occur via the casing of...
by Max
Thu Oct 15, 2009 6:18 pm
Forum: Graphics & Vision
Topic: Discrete Cosine Transformation (DCT)
Replies: 2
Views: 7688

Re: Discrete Cosine Transformation (DCT)

Lambda(i) should be Lambda(u) in the 1-D form. https://robot.lk/download/file.php?id=454 I think it is right as Sigma i is used and refer to https://robot.lk/download/file.php?id=455 Or else I do not understand your point. I'm open to discuss :) Also, I have copied this article from a site as per r...
by Max
Wed Sep 30, 2009 2:46 am
Forum: Digital Signal Processors
Topic: Format for representing fixed point numbers
Replies: 0
Views: 1024

Format for representing fixed point numbers

Fixed point numbers and number notation: In Fixed-point numbers the imaginary binary point plays a significant role while interpreting numbers. When dealing with numbers the digits to the left of imaginary binary point represents the integer and the digits to the right of binary point represents fr...
by Max
Wed Sep 30, 2009 2:42 am
Forum: Graphics & Vision
Topic: JPEG Image Compression Explained
Replies: 0
Views: 5825

JPEG Image Compression Explained

What is Compression? Representing the data (Image, Audio, Video, Speech or Voice..) with the fewer number of bits than what it exactly requires to represent. Basic Need of Compression Effectively utilizing transmission bandwidth .Utilization of the storage media to the maximum. Types of Compression...
by Max
Wed Sep 30, 2009 2:35 am
Forum: Graphics & Vision
Topic: Discrete Cosine Transformation (DCT)
Replies: 2
Views: 7688

Discrete Cosine Transformation (DCT)

The discrete cosine transformation (DCT) helps separate the image into parts (or spectral sub-bands) of differing importance (with respect to the image's visual quality). The DCT is similar to the discrete Fourier transform: it transforms a signal or image from the spatial domain to the frequency do...
by Max
Wed Sep 30, 2009 2:22 am
Forum: Graphics & Vision
Topic: Introduction to Image Registration (IR)
Replies: 0
Views: 1860

Introduction to Image Registration (IR)

Image registration (IR) is a process of overlaying images (two or more) of the same scene taken at different times from different viewpoints, and/or by different sensors. The registration geometrically aligns two images. Approaches: The reviewed approaches are classified according to their nature 1....
by Max
Thu Sep 24, 2009 3:23 am
Forum: Digital Signal Processors
Topic: Pitch Shifting Using The Fourier Transform
Replies: 0
Views: 1592

Pitch Shifting Using The Fourier Transform

With the increasing speed of desktop computer systems today, a growing number of computationally intense tasks such as computing the Fourier transform of a sampled audio signal have become available to a broad base of users. Being a process traditionally implemented on dedicated DSP systems or rathe...

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