Data reading and writing apparatuses and data reading and writing methods
AssigneeHuawei Technologies Co., Ltd.
InventorsHongwei TANG, Jun XU
Life of this patent
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Abstract
Data reading and writing apparatuses and data reading and writing methods are provided. In the data reading apparatus or the data writing apparatus, an optical head array including a plurality of laser heads is disposed, so that a quantity of laser heads for reading/writing data is increased. In addition, each laser head is improved, and a plurality of focal points are disposed in each laser head, so that in one data reading/writing process, parallel reading/writing of a plurality of pieces of data may be implemented by using the plurality of laser heads and the plurality of focal points in the laser head, and a data read/write throughput of an optical storage medium may be improved.
Claims17
A data reading apparatus, comprising:
- an optical signal generator, configured to generate an optical signal;
- an optical head array, comprising a plurality of laser heads, wherein each laser head comprises a plurality of focal points;
- and the plurality of laser heads are configured to receive the optical signal, and apply the optical signal to a plurality of data points of an optical storage medium by using the plurality of focal points of each laser head, to obtain a plurality of data signals;
- and
- a processing module, configured to receive the plurality of data signals, and process the plurality of data signals to obtain read data.
A data writing apparatus, comprising:
- an optical signal generator, configured to generate an optical signal;
- a plurality of optical modulators, wherein each of the plurality of optical modulators is configured to receive the optical signal, and modulate the optical signal based on to-be-stored data to obtain a plurality of modulated signals;
- and
- an optical head array, comprising a plurality of laser heads, wherein each laser head comprises a plurality of focal points;
- the plurality of laser heads are configured to receive a plurality of modulated signals sent by the plurality of optical modulators, and respectively control on/off of a plurality of corresponding focal points based on the received plurality of modulated signals, to write the to-be-stored data in parallel into an optical storage medium;
- and one laser head receives a plurality of modulated signals sent by one optical modulator.
A data reading method, wherein the data reading method is performed by a data reading apparatus, the data reading apparatus comprises an optical signal generator, an optical head array, and a processing module, and the method comprises:
- generating, by the optical signal generator, an optical signal, wherein
- the optical head array comprises a plurality of laser heads, each laser head comprises a plurality of focal points, and the plurality of laser heads receive the optical signal, and apply the optical signal to a plurality of data points of an optical storage medium by using the plurality of focal points of each laser head, to obtain a plurality of data signals;
- and
- receiving, by the processing module, the plurality of data signals, and processing the plurality of data signals to obtain read data.
A data writing method, wherein the method is performed by a data writing apparatus, the data writing apparatus comprises an optical signal generator, a plurality of optical modulators, and an optical head array, and the method comprises:
- generating, by the optical signal generator, an optical signal, wherein
- each of the plurality of optical modulators receives the optical signal, and modulates the optical signal based on to-be-stored data to obtain a plurality of modulated signals;
- and
- the optical head array comprises a plurality of laser heads;
- each laser head comprises a plurality of focal points;
- the plurality of laser heads receive a plurality of modulated signals sent by the plurality of optical modulators, and respectively control on/off of a plurality of corresponding focal points based on the received plurality of modulated signals, to write the to-be-stored data in parallel into an optical storage medium;
- and one laser head receives a plurality of modulated signals sent by one optical modulator.
Dependencies are inferred from the claim text.