Software for Telecoms & Audio
supply quality software for DSP-related functions in the field of electronics.
Specialising in telecoms and audio applications, we have a range of code
modules in the following
categories: modem data pumps, telephony signal interfacing eg
DTMF, audio, and utility components such as FFT. The modules have 2 software
formats: assembler for the
Assembler (asm) code: the ‘C5000 range of fixed-point DSPs is well established in many applications, from mobile phones to digital cameras. The range features high processing power, large on-board memory, low current consumption and low unit cost. The code here is in the ‘C54x sub-range assembler which also runs on the ‘C55x sub-range. The assembler format is highly efficient in minimising DSP processing power, data-, and program-memory usage. Each module has a C “wrapper” if required but can be operated at the assembler interface. Some legacy code is also available for the earlier TI 'C2xx/ 'C5x DSPs.
C code: in this form, the code modules can operate on any processor that has an ANSI C compiler. The C coding is designed especially for efficient operation on low-cost fixed-point DSP- and general-purpose micro-processors. All data memory is specified as 16-bit integer words. Multiplies are integer 16x16-bit with 32-bit products. The assembler and C versions of each particular function are “bit-exact” in execution.
Code module design: each has been carefully crafted to give excellent signal performance whilst minimising processor resource usage. For example, the modem software has many novel features to give excellent error rate / signal-to-noise ratio (SNR) figures over both flat and poor channels.
Code module features: operation is by callable subroutines with uncomplicated interfaces. Permanent data memory for use by the routines is passed normally by a single address pointer. This allows the user much flexibility in implementing multiple channels and in overlaying memory. All functions are single-processor based and, apart from resource needs, are platform-independent. The source code is thoroughly commented for easy maintenance.
Code module purchase: is under simple licenses, usually for a one-time fee. Modules are supplied with user's guides and example test files to illustrate code interfaces and operation. Integration support can be provided.
site updates: 27
Dec 2012 - addition of exchange tone detection and P.56 speech meter C
Last site updates:
27 Dec 2012 - addition of exchange tone detection and P.56 speech meter C code modules