Optical disc device capable of recording or reading with high efficiency
AssigneeSanyo Electric Co., Ltd.
InventorKatsuki Hattori
Life of this patent
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Abstract
High efficiency recording is carried for recording recording data generated by a second recording system signal processing circuit 11 to a recording disc corresponding to an existing first standard, and in this case the recording data generated by the second recording system signal processing circuit 11 is selectively recorded to the first recording disc based on one of a first or a second standard. In this way, high efficiency recording is possible regardless of whether data has a recording format corresponding to the first standard or the second standard.
Claims4
An optical disc device, for recording data having a data format of a second standard that has a higher data format efficiency than a first standard, to a first recording disc on which a PCA is provided as an area for performing test writes and a PMA is provided as an area for temporary period storage of data until a session is closed during recording, both the PCA and the PMA being located on a side closer to the center of the disc than a lead-in area in accordance with a recording disc format of the first standard, comprising:
- a first recording system signal processing circuit for subjecting input data to signal processing in order to generate recording data corresponding to a data format conforming to the first standard;
- and
- a second recording system signal processing circuit for subjecting input data to signal processing in order to generate recording data corresponding to a data format conforming to the second standard, wherein,
- when recording to the first recording disc corresponding to the first standard, it is possible to selectively use one of the first or second recording system signal processing circuits, and in the event that the recording data generated using the second recording system signal processing circuit is recorded to the first recording disc, a control processing format is switched for selectively recording the recording data generated using the second recording system signal processing circuit to the first recording disc based on a recording format conforming to one of the first or second standards, the entire PMA region is subjected to padding using special data, and disc information to be stored in the PMA according to the recording disc format of the first standard is recorded to the lead-in area.
An optical disc device, for reading a high efficiency recording mode disc on which a PCA is provided as an area for performing test writes and a PMA is provided as an area for temporary periods storage of data until a section is closed during recording, both the PCA and the PMA being located on a side closer to the center of the disc than a lead-in area in accordance with a recording format of a first standard, having recording data having a data format of a second standard that has a higher data format efficiency than the first standard, having a disc discrimination function for determining that there is a high efficiency recording mode disc, and selectively carrying out reading operations corresponding to a recording format based on the first and the second standard using a host device, comprising:
- a first reading system signal processing circuit for carrying out signal processing for read out data read out from a disc in order to decode record data corresponding to a data format of a first standard;
- a second reading system signal processing circuit for carrying out signal processing for read-out data read out from a disc in order to decode record data corresponding to a data format of a second standard;
- and
- recording format determining means for determining a recording format of the data when it has been discriminated that there is a high efficiency recording mode disc, wherein,
- whether read-out data read out from a disc corresponding to the first standard corresponds to a data format conforming to the first standard or the second standard is determined by reading special data padded in the PMA, such that, when it can be determined based on the read special data that the disc is a recording disc of the first standard, it is determined that the data is recorded in accordance with the data format of the first standard, and, when it cannot be determined based on the read special data that the disc is a recording disc of the first standard, it is determined that the data is recorded in accordance with the data format of the second standard, and
- when it is discriminated that the data corresponds to the data format conforming to the first standard, the readout data is sent to the first reading system signal processing circuit, and when it is discriminated that the data corresponds to the data format conforming to the second standard, the readout data is sent to the second reading system signal processing circuit, and,
- said host device, comprising:
- a first standard system reading function for reading the recording data recorded on the disc corresponding to the first standard using a high efficiency recording mode with a recording format based on the first standard, and
- a second standard system reading function for reading the recording data recorded on the disc corresponding to the first standard using a high efficiency recording mode with a recording format based on the second standard, and
- when it is discriminated that the data corresponds to a data format conforming to the second standard, one of the first or second standard system reading functions built-in to the host device is selectively operated according to the recording format of the recording data determined by the recording format determination means.
Dependencies are inferred from the claim text.