CDMA phone sets low-cost bar
Teardown 10/30/2006 Post a comment
LG Electronics' RD3330 CDMA phone for Indian cellular markets keeps component count and feature set to a minimum to meet aggressive production cost targets.
Fixed-Point DSP and Algorithm Implementation
Design How-To 10/25/2006 6 comments
This article provides a primer on the use of fixed-point arithmetic in DSP algorithms. It covers concepts such as two's complement representation, dynamic range, overflow, truncation, and saturation. The article also introduces key filtering concepts.
Tear Down: Inside the Apple 8GB iPod nano
Teardown 10/8/2006 Post a comment
What makes the new 8GB iPod nano are the "mystery chips" that have been widely speculated about. These three Apple packaged components in the latest iPod nano have telltale marks that unequivocally prove the manufacturers.
Open Source Embedded Asterisk-based PBX
Design How-To 10/4/2006 3 comments
Building an embedded IP-PBX represents a significant paradigm shift from existing open source PBX designs that typically use PCI cards on x86 platforms. Until recently, current micro controllers
(e.g. those in the 200MHz ARM & MIPs class) typically lack the DSP
horsepower for multiple channels of speech compression or echo
cancellation that is required for analog line interfaces. The Analog
Device Blackfin chip has changed all this......