Specifications include, but are not limited to: A. Provide even distribution of the reinforced sound throughout the designated areas, typically plus or minus 3db SPL (Sound Pressure Level) front to back and side to side for one octave band pink noise centered at 2000Hz. Total variation shall not exceed plus or minus 3dB SPL. B. Provide uniform frequency response throughout the designated areas. Typically, plus, or minus 3dB across the areas with l/3 octave-bands of pink noise from 80Hz to15,000 Hz. C. Provide adequate dynamic range at an acoustic distortion level sufficiently low to reproduce a SPL in excess of 96 dB with no more than .5% total harmonic distortion. The system shall be capable of delivering 96 dB average program level with an additional 10 dB-SPL peaking margin at an acoustic distortion level below 3% THD to all areas at the designated bandwidth. D. System shall be free of short circuits, ground loops, parasitic oscillations, noticeable noise, hum, and instability of any form, including RF interference. E. Video performance: 1. Frame rate: 25 frames per second 2. Widescreen (16:9) 3. Frame size: minimum of 720 x 576 pixels (PAL) 4. HD welcomed: minimum = 1080p 5. Video codec: H.264 6. Video bitrate: minimum of 3 Mbps 7. Audio codec: AAC 8. Audio Frequency: 48000 Hz 9. Audio bitrate: minimum of 128 kbps
