Feasibility study of a real-time operating system for a multichannel MPEG-4 encoder

Olli Lehtoranta; Timo D. Hamalainen

doi:10.1117/12.593631

14 March 2005 Feasibility study of a real-time operating system for a multichannel MPEG-4 encoder

Olli Lehtoranta, Timo D. Hamalainen

Proceedings Volume 5684, Multimedia on Mobile Devices; (2005) https://doi.org/10.1117/12.593631
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

Abstract

Feasibility of DSP/BIOS real-time operating system for a multi-channel MPEG-4 encoder is studied. Performances of two MPEG-4 encoder implementations with and without the operating system are compared in terms of encoding frame rate and memory requirements. The effects of task switching frequency and number of parallel video channels to the encoding frame rate are measured. The research is carried out on a 200 MHz TMS320C6201 fixed point DSP using QCIF (176x144 pixels) video format. Compared to a traditional DSP implementation without an operating system, inclusion of DSP/BIOS reduces total system throughput only by 1 QCIF frames/s. The operating system has 6 KB data memory overhead and program memory requirement of 15.7 KB. Hence, the overhead is considered low enough for resource critical mobile video applications.

Citation Download Citation

Olli Lehtoranta and Timo D. Hamalainen "Feasibility study of a real-time operating system for a multichannel MPEG-4 encoder", Proc. SPIE 5684, Multimedia on Mobile Devices, (14 March 2005); https://doi.org/10.1117/12.593631

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