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LOLA (Low Latency audio visual streaming system)

Lola is a high-quality audio/video transmission system designed for interactive musical tasks, network music performances, and education. Its functions include connection negotiation, audio/video data transmission, and a graphical user interface for easy control. Developed by experts in music and technology, Lola aims to provide the lowest possible delay with optimal AV presentation quality. This system is ideal for managing synchronous audio/video streams over packet networks and is tailored for musical performances that rely on both aural and visual communication. Lola ensures minimal delay requirements for interactive tasks and music performances, making it suitable for educational purposes as well.

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LOLA (Low Latency audio visual streaming system)

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  1. LOLA (Low Latency audio visual streaming system) A LOW LATENCY, HIGH QUALITY AUDIO/VIDEO TRANSMISSION SYSTEM FOR NETWORK MUSICAL PERFORMANCES AND INTERACTION Speakers Nicola Buso, Carlo Drioli

  2. LOLA (Low Latency audio visual streaming system) Production Conservatorio di musica G. Tartini - Trieste Implementation Paolo Pachini: general coordination Carlo Drioli: programming Nicola Buso: testing and musical advice Claudio Allocchio (Consortium GARR): testing and networking advice Massimo Parovel: conception and supervision

  3. Motivations and Objectives • Target applications: interactive musical tasks • Network musical performances • Network music education and training • Challanges • Management of synchronous audio video streams over packet networks • Minimal delay requirements for interactive task and music performances • Optimal balance between AV presentation delay and quality • Targets of the project • A system suitable for musical performances relying on both aural and visual communication • Providing lowest possible delay using available technology • Low cost and portable equipment • Oriented to dedicated networks (LightNet Project, GARR Consortium)

  4. Functions and networking Connection negotiation and management • Send/receive and manage connection requests • Negotiation of audio/video formats and compatibility check Video: 640*480, 30-60 fps, BW/Color Audio: 44100, 16/24 bit, mono/stereo, etc • Transmission of raw audio and video streams, monitoring

  5. Functions and networking Audio/Video data grabbing and transmission • Grabbing and Tx with low latency devices Video: Grabber BitFlow, BW progressive scan camera Audio: RME HDSP9632 Network: 1GBps Ethernet Card • Presentation delays (no Tx): < 5 msec (audio and video) • Delays due to Network: from 1 msec (LAN/WAN) to >10-20 msec, depending on the distance • On actual networks, jitter buffers are required (delay vs quality balance) • At present, tests are ongoing on dedicated GARR network setups

  6. Functions and networking Graphical user interface GUI functions • Controls for connection negotiation and management • Audio/Video buffering controls • Visualization options, audio mixer, etc • Recording

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