DSP Engineer - Audio Systems Engineer / 5 - 8 Years / Bangalore


Posted 09 Mar 2017 (138 days ago)

Job Description

Qualification: Graduate/Post graduate in Computer Science / Electrical / Electronics and Communication Engineering with 5 – 8 years of experience Mandatory Skills: - Strong background in integrating and delivering VOIP systems, specifically on the audio media side - Strong working knowledge RTP/ SRTP, RTCP/SRTCP and RFCs commonly used in VOIP systems - Jitter buffer design and implementations - Good knowledge of Speech standards (G729/ AMR/ AMR-WB/ EVRC/ EVRCB/ Opus/ EVS) - Expertise in streaming audio media over UDP preferably as RTP packets (AMR RFC 4867 / RTP Redundancy / DTMF RFC 4733 /etc) - Hands on audio system integration expertise. As an example integration of audio codes; integration of modules like AEC, DTMF detection and generation, Voice Activity Detection (VAD). - Hands on experience with debugging complex issues within a real-time system - Hands on experience on FFMPEG code and libraries for media processing is strongly desired. Trans-coding / Trans-rating using FFMPEG library. - Development experience on multithreaded programming on multi-core Intel processors. Optimization techniques. - Working knowledge of multithreaded code debugging tools on intel platforms is desired. - Strong C / C++ fundamentals. Desired Skills: - Knowledge of design and development necessary for Audio QoE metrics (R-Factor / SLA metrics / MOS etc) - Knowledge of DSP algorithms in Speech Encoders, Speech Decoders, AEC, Noise Reduction, Noise Detection, Voice Activity Detection (VAD) etc.. - Knowledge of implementing automatic rate adaptation in audio based on RTCP feedback. - Knowledge of Intel Assembly language programming (SSE/ SSE2/ SSE3/ AVX/ etc..). - Experience on any one of the scripting language - Python, Perl, shell. - Knowledge of evaluating Speech quality (PESQ), Usage of media analysis tools like Cool Edit, Wireshark, etc.. - Knowledge of SIP protocol. - Knowledge of Version Control tools like Rational ClearCase, PVCS etc. - Knowledge of Agile/Scrum work practices.

Key Skills



Employment Type

Full Time

Job Function


Experience Required

5 - 8 Years

No Of Positions

Salary Offered

INR 1000000 - 1800000

Interview Locations

Client Location - Bangalore(Interview Mode - Face 2 Face)

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