Abstract: A digital signal processing circuit for processing and recording data at various selectable rates, having an input/output circuit for receiving and outputting a digital signal; a recording circuit for generating a recording signal based on a digital signal received by the data signal processing circuit; a playback circuit for retrieving recorded data; and a demodulation circuit for demodulating retrieved data. The processing and recording rates are determined by control data supplied to the circuit either via an operator or from a recorded signal.

Abstract: A digital signal processing circuit has a memory circuit to store reproduction data and recording information, a reproduction signal processing circuit for demodulating a reproduction signal to thereby obtain the reproduction data and the recording information and for storing the reproduction data and the recording information into the memory circuit, an error detecting and correcting circuit for executing an error detecting and correcting process on the reproduction data, and a data output circuit for outputting the reproduction data stored in the memory circuit on the basis of the recording information.

Abstract: A digital signal processing circuit for use in different types of digital audio tape recorder that record a standard track format using different arrangements of rotary drum and the like. The circuit provides a record signal having a transmission speed and timing switched in accordance with the structure of the rotary drum and the like.