The studios make thousands of copies at different facilities, and maybe one of the facilities did not use a captioned master video asset. If there are no captions on a video, the master video asset used to make the copies may not have had captions.
Why are some home videos labeled as being captioned, but there are no captions on the movie?Ī. It also is possible that the new program provider received an uncaptioned master video asset and was not aware that a captioned version was available. Any changes to a program will affect the captions. Once a program is captioned, the captions should stay with that program for rebroadcast unless the program has been edited. Why does a program appear on one channel with captions and is repeated on another channel without captions?Ī. A weak transmission of a television signal, poor reception of the television signal as it travels into the home, or cable problems in the home can also garble captions or cause white boxes to appear within captions. Since the caption data is inserted directly into the television transmission signal, anything blocking the signal path will cause the captions to become garbled or disappear altogether. Captioning problems can occur for a variety of reasons and the problems can stem from different sources depending on the type of broadcast, such as network, syndication or cable. Why are captions missing from programs? Why are they garbled?Ī.
#WHAT IS CLOSED CAPTIONING SOFTWARE#
Live display (also known as punchback) captioning is used when a program script is available beforehand for a live event broadcast.Īutomated Speech Recognition (ASR) produces captions using voice recognition software with no human intervention. Real-time captioning is used for live programs such as news and sports. Off-line captions are used for prerecorded programs and are prepared before the programs are shown on television. A variety of types of captioning are used depending on the need:
Closed Captioning is the process of displaying text on a television, video screen, or other visual display to provide additional or interpretive information.