 Asynchronous sample pulse generator |
| These and other problems are resolved in accordance with the inventive principles to be described ... |
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| Data synchronization |
| OF THE PREFERRED EMBODIMENT Referring now in detail to FIGS. 1 and 2, FIG. 1 shows the ... |
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| Therapeutic subliminal imaging system |
| The invention relates to portable systems for implementing behavior modification therapy wherein a ... |
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| Trinary bus communication system |
| This invention presents a method and means of electrically communicating trinary digital ... |
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| High speed data transfer over twisted pair cabling |
| In accordance with the teachings of the present invention, a method is provided for transmitting ... |
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| Programming logic device with test-signal enabled output |
| In accordance with one aspect of the present invention, there is provided a programmable logic ... |
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| Programmable combinational logic circuit |
| The invention provides a programmable logic circuit which is capable of providing any selected ... |
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| Dynamic random access memory arrangements having WE, RAS, and CAS derived from a single system clock |
| One object of the present invention is to provide an improved means of deriving control signals for ... |
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| Power saving sense amplifier that mimics non-toggling bitline states |
| According to the invention, a sense amplifier selectively prevents formation of the current branch ... |
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Digital recorder for processing in parallel data stored in multiple tracks
| Details |
Inventors: Iizuka, Nobuo; Manabe, Hajime;
Assignee: Casio Computer Co., Ltd. (Tokyo, JP)
Primary Examiner: Epps; Georgia Y.
Assistant Examiner: Huber; P. W.
Attorney, Agent or Firm: Frishauf, Holtz, Goodman, Langer & Chick
A buffer serves as a sub-memory with respect to a hard disk and performs a data recording/reproducing operation. With this arrangement, even if the access rate of data in the hard disk is not so high, data transfer between the hard disk and an audio I/O, a MIDI I/O, and image I/O can be performed, and audio, MIDI, and video data can be simultaneously and selectively recorded/reproduced. |
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DETAILED DESCRIPTION It is therefore an object of the present invention to provide a digital recorder which is designed to suppress the large-scale hardware structure and reduce the load of a CPU.
It is another object of the present invention to provide a digital recorder with a simple structure which can freely edit recorded data without actually rewriting the data.
It is still another object to provide a multimedia recorder which can record/reproduce various data such as audio, video, and sequencer data as integral data by using an external memory device of a random access type, e.
g.
, a hard disk or an optomagnetic disk, and can edit the data.
It is still another object of the present invention to provide an automatic performance apparatus which allows simple reproduction of audio and video data in accordance with a performance of music.
It is still another object of the present invention to provide an automatic performance apparatus which can integrate and record/reproduce performance data, audio data, and video data.
According to one aspect of the present invention, there is provided a digital recorder comprising: signal input/output means for executing a signal input/output operation in association with multiple tracks: buffer means capable of exchanging digital data with the signal input/output means for each track and temporarily storing the digital data in association with the tracks; external memory means of a random access type capable of exchanging the digital data with the buffer means and having a memory area for multiple tracks which is accessible for a read/write operation of the digital data; and data transfer means for executing transfer of digital data for each track between the signal input/output means and the buffer means and transfer of digital data for each track between the buffer means and the external memory means in a time-shared manner while scheduling in accordance with a predetermined priority order.
With the above structure, the data transfer means can execute transfer of digital data such as audio data and video data, etc
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I/O Systems 
