Patent ID: 6795385
Filing Date: 2004-09-21
Classification: G11B

Abstract:
An optical disk recording and reproducing apparatus comprising:a buffer circuit configured to receive and store data input via an interface and output the stored data; an EFM modulation circuit connected to the buffer circuit for receiving data output from the buffer circuit, adding at least a frame synchronous signal and sub-code data with respect to the data, subjecting these items of data to the EFM modulation to create record data to be recorded on an optical disk; a buffer remaining amount control circuit connected to the interface and the EFM modulation circuit for detecting the remaining amount of data stored in the buffer circuit; a record control circuit connected to the EFM modulation circuit and the buffer remaining amount control circuit for conducting the control for temporarily suspending the recording operation with respect to the optical disk at an arbitrary position of the main data of the record data excluding the frame synchronous signal and the sub-code data in the case where the detection result of the remaining amount of data in the buffer remaining amount control circuit corresponds to the state in which a data transmission rate of an input data to the buffer circuit is lower than a data transmission rate of an output data from the buffer circuit to the EFM modulation circuit at a time of recording data on the optical disk; and a record restarting position detection circuit connected to the record control circuit for receiving data obtained by reproducing the optical disk on which the recording operation is temporarily suspended in the midst of recording the record data and detecting the position of the disk on which the recording operation is temporarily suspended; wherein the record control circuit conducts a control for restarting a recording operation with respect to the optical disk from the record restarting position on the disk detected with the record restarting position detection circuit in the case where the detection result of the remaining amount of data in the buffer remaining amount detection circuit corresponds to the state in which the data transmission rate of the input data to the buffer circuit is higher than the data transmission rate of the output data from the buffer circuit to the EFM modulation circuit.