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: telephone modem data pumps, telephony signal interfacing eg
Caller ID, DTMF, audio and speech coding, and utility components such
as FFT. The modules have 2 software formats: assembler for the
Assembler (asm) code: the TI ‘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 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. The code here runs on both the 'C55x and 'C54x sub-ranges, being written in the ‘C54x ssembler.
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 code modules have many novel elements 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 is passed normally by a single address pointer. This allows the user much flexibility in implementing multiple channels and in overlaying memory. All functions, 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.