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♪ All about that VANC ♪
The Line parameter sets the VANC line on which caption data will beinserted into the HD video signal. Valid VANC insertion lines for the most common HD video formats. Many caption encoders insert closed captions on line 9 by default. *In interlaced formats, caption data will only be inserted once per frame, in the first… Continue reading
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708 Caption Encoding
Packets in CEA-708 Caption streams are transmitted with many packet wrappers around them. These are the picture user data, which contains the caption data, which contains the cc_data, which contains the Caption Channel packets, which contains the Service Block, which contains the caption streams. These packets are described in detail in this section. But the… Continue reading
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SRT and SCC Caption Alignment Codes
Top-left: {\an7} – Top-center: {\an8}Top-right: {\an9} – Middle-left: {\an4}Middle-center: {\an5} – Middle-right: {\an6}Bottom-left: {\an1} – Bottom-right: {\an3} Continue reading
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Differences between CEA 608 and 708 Captions
608 708 Native Broadcast NTSC Analog DTV HDTV ATSC 1.0 Characters per Row 32 theta columns 42 Baud Rate 960 bps 9600 bps Mapping Grid Based Block Based Container 32 x 15 grid 8 blocks Maximum Horizontal Lines Displayed at One Time 4 Character Colors white white, multiple colors Background Colors block white, multiple colors,… Continue reading
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Monitor’s 16:10 Aspect Ratio Adds Black Letter Box Bars Across Top & Bottom of 16:9 Video
An 2010 Sony LMD-2451W broadcast monitor was diplaying closed captions in too low of a vertical line position. It lacks an internal caption decoder so it’s fed by an EEG DE-285 Decoder. The Sony LMD-2451W monitor adds a black bar at the top and bottom of 16:9 content. I toggled through every menu setting but… Continue reading
About Me
Hello there! My name is Vicki Kipp, and I am a closed caption maker. Making closed captions is time consuming and complicated, so this blog is a collection of all of the knowledge and experiences I have gained. I hope my collection of tips and tricks might help you with your closed caption work the way it has helped me!
Recent Posts
- FCC Website Requirement: FCC Applications Link/Page
- Engineering Perspective: Closed Captioning Broadcast Engineering Videos
- Comments on FCC Docket No. 16-142_ Authorizing Permissive Use of the Next Generation Broadcast Television Standard
- How to Replace a Transmission Line Watchband Spring
- Netflix Subtitle Style Guide 2024