Home
Modems
Telephony
Audio
Utilities
Consultancy
Glossary
Index
Contact us

AlgoTron 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 for standard functions such as telephone modems and audio coders.  We can also generate bespoke code to order.  Our target customers are manufacturers wishing to outsource such products and expertise.

The code modules available are categorised thus: modem data pumps, telephony signal interfacing eg DTMF, audio, and utility components such as FFT. They are in two formats: in assembler for the Texas Instruments TMS320C5000 range of DSP processors, and in C for DSP-/micro-processors in general.

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 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.

Individual code modules are operated 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.

Each module 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. The code modules can be purchased under simple licenses, usually for a one-time fee. They are supplied with user's guides and example test files to illustrate code interfaces and operation. Integration support can be provided.

We can also perform general consultancy and contract work in the field of DSP, and are particularly adept in designing and implementing from scratch

Last site update: 15 July 2011 - revamp and addition of C code modules