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ARM and Spirit form Strategic Partnership
for Mobile Multimedia. |
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New Low Power Data Converter from Analog Devices. |
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High
Performance Xilinx Spartan-3 FPGA board with USB 2.0 Host Interface. |
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Texas Instruments Introduces
the Industry’s Very Low Cost Floating-Point DSP. |
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Precision 14-bit Data Acquisition Board for the
F2812 eZdsp Development System. |
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New 90nm Lattice ECP2M FPGAs. |
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ip.access selects picoChip technology
for 3G femtocell development. |
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Parsec Announces PMC Module Leveraging
Altera’s Stratix II GX and Stratix FPGAs |
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New Digital Receiver Board
with High-Speed A/D. |
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Spectrum Digital announces the new XDS560R USB JTAG Emulator.
This advanced emulator, selling for $ 2499.00 in North America,
supports TI DavinciTM, OMAP, C6xxx, C5xxx, F28xx, and TMS470
ARM processors. Availability: Aug 1, 2006. more>> |
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16 Ch. Digital Receiver PMC Card with 4 A/Ds
Ideal for Software Radio & more!!!
more>> |
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Kane Computing Limited has cemented
key relationships with TI, TI ASPs and 3rd Party Partners
to provide EVMs, Emulators, SDK's, Codecs and Linux Middleware
for DaVinci, plus UK based advice and support. more>> |
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Blackhawk’s
USB560BP JTAG Emulator for TI DSP’s is not only the
most popular and preferred USB emulator, but also the first
XDS560-class device that requires NO power supply and weighs
under 5 ounces.
Special Offer. more>>
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The FPGA05 family of Xilinx Virtex-5
LX FPGA PMCs from VMETRO merge a new generation
of DSP performance with a choice of I/O options including
analog input/output, LVDS, Camera Link, RS485 and FPDP. more>> |
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The SMT489, is an FPGA PrPMC
module with lots of IO interfaces and a 64 bits, 66MHz
PCI bus support delivering data rate of 500+MB/s. SMT498’s
XC2VP100 FPGA is the largest available from Xilinx. more>> |
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The Dallas Basestation Conference – enabling
mobile broadband networks: 7th – 9th Nov 2006. Bringing
together major global manufacturers, operators, analysts and
service providers in the mobile network infrastructure community.
more>> |
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GSPx Silicon Valley, the International
Signal Processing Conference. October 30-November 2, 2006:
Addressing the needs of design engineers
and developers working on today’s increasingly complex
designs. more>> |
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| Not a DSPStore Member? Register now to receive your FREE copy of the DSPStore e-Newsletter. |
If you would like to feature your product or
article in the next issue of DSPStore e-Newsletter please contact
the editor: Publication
date is 1st November
2006
Andrew Bateman: ab@dspstore.com
Tel: +44 (0)1225 723 349 |
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| Square Root
and Inverse Square Root Approximations -
by Iain Paterson Stephens |
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It is often necessary to
be able to calculate the square root or inverse square root of
a non-negative floating-point number to a high degree of accuracy.
This may be used, for example, when calculating the magnitude
of the output from an FFT or for Feedforward Automatic Gain Control.
A simple, effective and fast algorithm for this is based on the
Newton-Raphson iteration method.
For example, the inverse square root 'x' of the floating point
number 'y' can be calculated as follows. more>> |
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Time
Stretching And Pitch Shifting of Audio Signals by
Stephan M. Bernsee.
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As opposed
to the process of pitch transposition achieved using a simple
sample rate conversion, Pitch Shifting is a way to change
the pitch of a signal without changing its length. In practical
applications, this is usually achieved by changing the length
of a sound using one of the below methods and then performing
a sample rate conversion to change the pitch.
There exists a certain
confusion in terminology, as Pitch Shifting is often also
incorrectly named 'Frequency Shifting'. A true Frequency
Shift (as obtainable by modulating an analytic signal by
a complex exponential) will shift the spectrum of a sound,
while Pitch Shifting will dilate it, upholding the harmonic
relationship of the sound. Frequency Shifting yields a metallic,
inharmonic sound which may well be an interesting special
effect but which is a totally inadequate process for changing
the pitch of any harmonic sound except a single sine wave. more>>
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DSPStore is a publication from Avren International
copyright 2002 - 2006 |
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