Chekib - Développeur ASSEMBLEUR

2004-2008 Video/DSP engineer at Scientific Atlanta, a Cisco Company. Tunis DSP team leader.

General skills:
• Video knowledge:
o Standards: H.264, MPEG2: I’m almost 100% familiar with the H.264/MPEG2 bit-stream syntax. I have also a good understanding of all the blocks of the H.264 codec.
o Video Quality :

 I have a good understanding of the Video value of most of the video features in the H.264 standard: inter modes (16x8, 8x16), intra search based on source or on reconstructed pixels, Mode decision based on predicted or reconstructed SAD, MBAFF, PICAFF, First pass encoding, Adaptive quantization, MB classification.

 Good understanding of the causes of some video artifacts (Blurriness, breathing, trailing, Mosquito noise,…)
o Video applications: Video conferencing, broadcasting.

• C64x TI DSPs knowledge:
o Good optimization skills: Writing assembly code, Caching, memory conflicts, code/Data sectioning,
o Internal/external memory DMA transfers: Design code to avoid DMA waiting problems, linking/chaining transfers
o DSP/FPGA communication: synchronizing Event triggered transfers, EMIF configuration.
o Multi-threading

 Semaphores: pending, posting , HWI, Tasks, PRD
o Other peripheral communication: Video Port, PCI, HPI.
• HD Davinchi: good knowledge of its architecture and capabilities.
• I have also good management skills: I was managing the DSP team in Tunis for more than 3 years.
• Communication & team work: I enjoy working within a team. I have good communication (verbal/written) skills; I talk almost weekly to other teams in Vancouver/Atlanta and Toronto to discuss project progress.
• Member of the video architecture team of new SA encoder product.

Main Projects:
• Optimization of the H.264 LifeSize Encoder: TMN8 Rate Control & Chroma DMA transferring.

• Redesign of the H.264 CABAC implementation for TI C6416 for PIP resolutions. C and assembly implementation.
o My good understanding of the H.264 standard helped me in breaking the data dependency in the Re-normalizer block allowing to change the design to be MB based,
o Speeding up the original code to run 150% faster and making a PIP encoder running real time on a single C6416 DSP.

• SONY IPELA Product:
o Strong participation of the design of the decoder product: I have computed the DSPs required bandwidth (through Video port and EMIF), Required cycles, and Required internal memory. I have also designed the packet communication scheme (required types of packets and their contents).
o Team leader of the decoder Library.

• Integration of New Video quality features (special effect algorithms) from the simulation software to run real time on the system D9054 SA product. Successful demo at NAB 07, & best stable product at EBU 07!

• Video quality improvement
o using Adaptive dead-zoning: better texture especially in soft texture (grass, clay-court)
o Removing of trailing artifact in player’s edges.

• Strong contribution in the design of next generation product:
o Evaluation of third party products: HD Davinchi, Ambarella, MobliyGen, TandbergTV,…
o Study of best motion search region (tradeoff: video quality/complexity); inspired from the properties of the HVS.
o Study of the value of Dual-pass encoding (video quality/complexity).
o Study of end-to-end delay, especially for the low delay applications.