Technical specification of broadcast files for all channels broadcast by Polcast Media Distribution
File Format
MXF container (in accordance with SMPTE 379-2004, SMPTE 377-2004, SMPTE 382M-2007) Pattern – OP1a (in accordance with SMPTE 378-2004)
1.2 XDCAM HD422 codec, 35 Mbps bit rate
2 Video Standard
2.1. 1080/i25
2.2 Video resolution of 1920×1080 pixels
2.3 Aspect ratio 16:9
2.4 Scanning Mode: Interlaced, Top First
3 Audio Standard
3.1 LPCM 16 or 24 bit/sample
3.2 Sampling frequency 48 kHz 4.
Required file organisation
4.1 Each commercial (broadcast) shall be delivered as a single file
4.2 The file must contain a Material Package-Time Code Track in accordance with EBU Recommendation R122
4.3 The MXF image descriptor must contain an AFD (Automatic Format Description) in accordance with SMPTE 2016-1 and SMPTE 2016-3
4.4 Each LPCM audio track shall comply with SMPTE 382-2007 (MXF GC Element, WAV, BFW Container). AIFF container should not be used)
4.5 Audio metadata (if available) shall be provided in accordance with SMPTE 2020
4.6 Test signals shall not be included in the broadcast file.
1 Audio Track Assignment:
5.1 Stereo Recording
A1 LPCM, stereo left channel
5.1.2. A2 LPCM, stereo right channel Audio signal level
6.1 The program signal volume level (advertisement) measured from the beginning to the end of the recording according to EBU-R128 recommendation) should be -23 LUFS. The maximum momentary signal level (“True Peak”) shall not exceed -1 dBTP
6.2 It is required that the dynamic range of the broadcast is appropriate for television broadcasting and takes into account the intelligibility of speech at home listening levels. The Loudness Range (LRA, measured by EBU-R128) should not exceed 15 dB Additional Notes: 7.1 The file to be played back shall meet the requirements of Recommendation ITU-R 601-5. Illegal colors shall meet the requirements of Recommendation EBU R103 and ITU-R BT 709-5 Part 2
7.2 Video signal levels
7.2.1 Tolerance for RGB components -5/+105% (-35 mV/735 mV)
7.2.2. Tolerance for YUV -1/103%, luminance level must be between -7 and 721 mV
7.3 Audio signals shall be recorded in phase with each other.
Compatibility of stereo and mono signals should be preserved. 7.5 The recorded material should have the correct image and sound synchronization. Audio to video delay should not exceed -20/+40 ms (Audio signal cannot be more than 20 ms ahead of video signal and cannot be more than 40 ms behind video signal).
7.6 The Action Safe Area and Graphics Safe Area shall comply with EBU Recommendation R95 “Safe areas for 16:9 television production”.