Patent ID: 6430356
Filing Date: 2002-08-06
Classification: G11B,H04N

Abstract:
An information recording and reproducing apparatus, in which a main digital information signal recorded in a first track of a first recording medium and an auxiliary signal recorded in a second track of the first recording medium are reproduced in a reproducing apparatus and the main digital information signal and the auxiliary signal reproduced by the reproducing apparatus are dubbed and recorded in a second recording medium in a recording apparatus, the reproducing apparatus comprising:main information signal reproducing means for reproducing the main digital information signal recorded in the first track of the first recording medium; auxiliary signal reproducing means for reproducing the auxiliary signal recorded in the second track of the first recording medium in synchronization with the reproduction of the main digital information signal in the main information signal reproducing means, the auxiliary signal being composed of a plurality of pulses arranged in series, a particular group of pulses in the auxiliary signal being set to a special duty ratio, and the other pulses of the auxiliary signal being set to an ordinary duty ratio; identification signal detecting means for detecting the particular group of pulses as an analog identification signal from the auxiliary signal reproduced by the auxiliary signal reproducing means; identification code preparing means for preparing an identification code corresponding to the analog identification signal in cases where the analog identification signal is detected by the identification signal detecting means; and packet preparing means for preparing a packet defined according to a prescribed serial interface to arrange the main digital information signal reproduced by the main information signal reproducing means and the identification code reproduced by the auxiliary signal reproducing means in the packet, and the recording apparatus comprising: packet detecting means for detecting the packet transmitted from the packet preparing means; main information signal detecting means for detecting the main digital information signal from the packet detected by the packet detecting means; main information signal recording means for recording the main digital information signal detected by the main information signal detecting means in a first track of the second recording medium; identification code detecting means for detecting the identification code from the packet detected by the packet detecting means; auxiliary signal generating means for generating a recording auxiliary signal composed of a plurality of recording pulses arranged in series, the recording pulses being set to a recording ordinary duty ratio; pulse duty ratio adjusting means for detecting a particular group of recording pulses, in synchronization with the detection of the identification code in the identification code detecting means, from the recording auxiliary signal generated by the auxiliary signal generating means, and adjusting the recording ordinary duty ratio of the particular group of recording pulses to a recording specific duty ratio; and auxiliary signal recording means for recording the auxiliary signal, in which the particular group of recording pulses is set to the recording specific duty ratio by the pulse duty ratio adjusting means, in a second track of the second recording medium in synchronization with the recording of the main digital information signal in the main information signal recording means.