What is the primary function of an ISDN codec in radio broadcasting?

The primary function of an ISDN (Integrated Services Digital Network) codec in radio broadcasting is to transmit high-quality audio. ISDN codecs are designed to facilitate the transmission of audio signals over digital telephone lines, ensuring that the sound quality remains high during the transfer. This capability is essential for radio broadcasters who need to maintain clarity and fidelity in their audio, whether it be live broadcasts, interviews, or remote reporting.

ISDN codecs work by converting analog audio signals into digital data, which allows for efficient and reliable transmission. This digital process minimizes loss and distortion, making them a preferred choice for professional radio applications where audio quality is paramount.

While compressing audio signals is a function associated with codecs in general, the unique advantage of ISDN codecs lies in their ability to deliver high-quality audio directly over telephone infrastructure. Recording audio and amplifying sound waves, while important in the context of broadcasting, are not the primary functions of an ISDN codec. The focus is specifically on the effective, high-quality transmission of audio.