Broadcast Quality Checking Process.

The Technical Checking or Quality Control QC of broadcast material ensures that all TV broadcast standards and specifications are met and maintained

. Professional QCing enables Distributors and Broadcasters to send material worldwide, safe in the knowledge that programs are fault free. It negates the need to urgently repair or replace material after distribution, thus meeting broadcast deadlines and ensuring client satisfaction.

During the process of QC, the Technician will measure the media parameters of the supplied program and assess its many technical aspects, as well as visually and audibly monitoring for any faults that may have been introduced in the Broadcast Duplication process..

Each tape format is assessed to ensure that the ID board, label and associated cue sheets all match the material on the tape. Audio track allocations are determined for accuracy, as is the programs aspect ratio, frame rate, VITC (Vertical Interval Time Code) and (LTC) Longitudinal time code.

Visually the QC Technician will watch the program - assessing the Vision and Chroma levels, colour timing, and note any errors that may have been introduced via the incorrect operation of equipment or equipment configuration, as well as human error or oversight.

Particular issues to be noted include such errors as dropouts, pixilation, channel condition errors, lag, stepping, Moir, Aliasing, flicker, Subtitles, missing VITC in vision lines, and that supers and subtitles are within the broadcast safe title area. All action is within Safe action, no black holes, continuous timecode, file and archival footage, DVCAM or Low band footage and conversion errors are all measured and noted. Clients may also wish to be notified of film based blemishes such as film scratches, pitting, cue slugs, negative and positive dirt.

Those involved in the broadcast QC process will also monitor all aspects of the programs audio. All audio formats are monitored for dropouts, pops, clicks, peak distortion, recorded distortion, crackle and any other audio issues that may inhibit viewing satisfaction.

These checks include confirming all tracks contain the relevant information for their allocation such as Dolby mixes. Stereo programs are checked for correct phase and Music and Effects tracks are assessed for accurate effects.

At the completion of the QC process, a detailed tech report is completed for the client, highlighting the faults found and the decision as to whether the program meets the clients technical and delivery specifications.

by: Mary-Anne Black

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