Disc recording and reproducing device and disc recording and reproducing method
View Patent ↗A disc recording and reproducing device and method record video data using a new file system other existing device cannot recognize. However, when a disc thus recorded is loaded in the existing device, the user is prevented from being instructed to format the disc (initialize the file system) or inadvertently erasing data thereon. The disc recording and reproducing device comprises the following elements. A first write-enable state setting unit checks a write inhibit flag when a disc is loaded, and sets the flag on the disc to a write-enable state when the flag is in a write-protect state. A first write-protect state setting unit checks information in a record history information storage when the disc is unloaded, and sets the flag on the disc to the write-protect state when data is recorded thereon or the flag in the memory is in the write-protect state and no data is recorded.
1. A disc recording and reproducing device using a disc as a recording media, the device comprising:
a write inhibit flag readout and judging unit for reading out a write inhibit flag for protecting a recorded portion of the disc;
a write inhibit flag writing unit for writing the write inhibit flag;
a write inhibit flag memory for storing the write inhibit flag read out by the write inhibit flag readout and judging unit, when the disc is loaded;
a first write-enable state setting unit for checking the write inhibit flag stored in the write inhibit flag memory when the disc is loaded, and for setting the write inhibit flag on the disc to a write-enable state when the write inhibit flag in the memory is in a write-protect state;
a recording history information storage for storing a history of recording information on the disc; and
a first write-protect state setting unit for checking information in the recording history information storage when the disc is unloaded, and for setting the write inhibit flag on the disc to the write-protect state when data is recorded on the disc or the write inhibit flag stored in the write inhibit flag memory is in the write-protect state and no data is recorded on the disc.
2. The disc recording and reproducing device of claim 1 , further comprising:
a record protection mode selection unit for selecting one of an automatic record protection mode and an ordinary record protection mode; and
a mode controller for stopping control of the write inhibit flag taken by the first write-protect state setting unit and the first write-enable state setting unit, when the ordinary record protection mode is selected.
3. The disc recording and reproducing device of claim 1 , further comprising a third write-enable state setting unit for checking information in the recording history information storage when the disc is unloaded, and setting the write inhibit flag to the write-enable state when no information is recorded on the disc.
4. A disc recording and reproducing device using a disc as a recording media, the device comprising:
a write inhibit flag readout and judging unit for reading out a write inhibit flag for protecting a recorded portion of the disc;
a write inhibit flag writing unit for writing the write inhibit flag;
a write inhibit flag memory for storing the write inhibit flag read out by the write inhibit flag readout and judging unit, when the disc is loaded;
a second write-enable state setting unit for checking a state of the write inhibit flag stored in the write inhibit flag memory when recording information onto the disc is started, and setting the state of the write inhibit flag on the disc to a write-enable state when the flag in the write inhibit flag memory is in a write-protect state; and
a second write-protect state setting unit for setting the state of the write inhibit flag on the disc to the write-protect state, when recording is stopped.
5. The disc recording and reproducing device of claim 4 , further comprising:
a record protection mode selection unit for selecting one of an automatic record protection mode and an ordinary record protection mode; and
a mode controller for stopping control of the write inhibit flag taken by the second write-protect state setting unit and the second write-enable state setting unit, when the ordinary record protection mode is selected.
6. The disc recording and reproducing device of claim 5 , further comprising a third write-enable state setting unit for checking information in a recording history information storage when the disc is unloaded, and setting the write inhibit flag to the write-enable state when no information is recorded on the disc.
7. The disc recording and reproducing device of claim 2 , further comprising a third write-enable state setting unit for checking information in the recording history information storage when the disc is unloaded, and setting the write inhibit flag to the write-enable state when no information is recorded on the disc.
8. A disc recording and reproducing method using a disc as a recording media, the method comprising:
a step of reading out and judging a write inhibit flag for protecting a recorded portion of the disc;
a step of writing the write inhibit flag;
a step of storing the write inhibit flag read out by the write inhibit flag reading out and judging step into a memory, when the disc is loaded;
a first write-enable state setting step of checking the write inhibit flag stored in the memory when the disc is loaded, and for setting the write inhibit flag on the disc to a write-enable state when the flag in the memory is in a write-protect state;
a step of storing a history of recording information on the disc; and
a first write-protect state setting step of checking information in the step of storing the history of recording information when the disc is unloaded, and for setting the write inhibit flag on the disc to the write-protect state, when data is recorded on the disc or the write inhibit flag stored in the memory is in the write-protect state and no data is recorded on the disc.
9. A disc recording and reproducing method using a disc as a recording media, the method comprising:
a step of reading out and judging a write inhibit flag for protecting a recorded portion of the disc;
a step of writing the write inhibit flag;
a step of storing the write inhibit flag read out by the write inhibit flag reading out and judging step into a memory, when the disc is loaded;
a second write-enable state setting step of checking a state of the write inhibit flag stored in the memory when recording information onto the disc is started, and setting the state of the write inhibit flag on the disc to a write-enable state when the flag in the memory is in a write-protect state; and
a second write-protect state setting step of setting the state of the write inhibit flag on the disc to the write-protect state, when recording is stopped.