UK & ROI Subtitle & Audio Description Technical Specifications XDCAM

All files uploaded to Peach Connect are immediately run through an Auto QC process. To ensure files are not rejected please adhere to the guidelines below.

File Layout

Files must be frame accurate and include 10” of pre-roll (7” Clock/Slate + 3” black). No post-roll such as black, hold or freeze is required.

The first and last 6 frames of the commercial must be mute.

Please Note: This applies to channel 1, 2 & 3, but not Channel 4 (Please see audio layout below).

Clock/Slate must include the following information:

Clock Number

Advertiser

Product

Title

Duration

Video Levels

Levels must be in accordance with ITU BT.709 for HD content, and EBU R103-2000 recommendations: 

Luma = Level 16-235 (not RGB 0-255 level), equivalent to 0% - 100% or 

0mV - 700mV. Chroma = Level 16-240, equivalent to maximum 100% RGB.

All content should be upper/first field dominant throughout and must be free of encoding artefacts, dropout, glitches, blocking, interlace issues or excessive aliasing and considered broadcast quality throughout.

Audio Levels

The Programme Loudness Level must be normalised to -23 LUFS (±0.5 LU) and -1 dBTP max, according to EBU R128 recommendation.

Audio should be free of any distortion, glitches or excessive sibilance and must be in phase and in sync with the video throughout.

Safe Area

Please ensure all On Screen Text is free from spelling and grammatical errors, and within the relevant Safe Area in accordance with EBU R95-2017 recommendations

HD Safe Area 1920x1080 Interlaced

Audio Layout

The audio channel layout is as follows:

Channel 1 - Stereo L

Channel 2 - Stereo R

Channel 3 - Audio Description/Mute

Audio Description must be -23 LUFS (±0.5 LU) and -1 dBTP max, with the first and last 6 frames of the commercial mute.

Channel 4 - Control Track/Mute

Control Track should be running continuously throughout the whole spot at -29.9dBTP

Channel 5 - Mute 

Channel 6 - Mute

Channel 7 - Mute

Channel 8 - Mute

Note: Both Audio Description and Control Track are mandatory for Audio Description files.

If Audio Description is not required Channels 3 & 4 must be Mute.

Subtitles

Subtitle captions are required to be OP-47 compliant within the MXF file according to SMPTE ST 436-1 for VANC data.

The subtitles are required to be on Line 12 / Field 2 (577) / Teletext PAGE 888 and should not be present in the first or last 5 frames of the commercial. 

Packet31 test data and dummy headers should not be present.