4 From the Top Down: Program Services
This chapter covers the process of assembling the program audio and program related text into a monolithic package to hand off to lower layers of the NRSC-5 protocol. It begins with a discussion of audio codecs, despite the lack of a specified codec in NRSC-5. This will provide the necessary background in the role of the codec to create context for the discussion of the program service protocols. This chapter discusses the Audio Transport Protocol, as well as two protocols that supply program related data to the audio transport—the Program Service Data protocol and the Program Service Data Transport protocol. ...
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