JPH07201131A - Minidisk recorder - Google Patents

Abstract

PURPOSE:To obtain a minirecorder for minidisk, capable of recording from the beginning of music even when recording is late started. CONSTITUTION:The recorder is provided with two recording commencing keys of an ordinary REC key 1 and a monitor REC key 1a and a storage means for writing an input voice data in a memory. The sound data stored in the memory is read out to be written on the disk by the monitor REC key 1a, so that even when the recording is late started, the precedent voice data stored in the memory can be written on the disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mini disk recorder.

[0002]

2. Description of the Related Art Conventionally, when recording is started, when a recording start operation is performed, a recording operation is started from a sound at the start of the operation to a recording start of a recording device, and a writing operation (recording) is performed.
Is started. Similarly, the MD recorder has a memory function of accumulating sound source data, but the original purpose of this memory function is to avoid external shock and to absorb the time difference when passing through the audio compression conversion circuit. , It was possible to record only the sound after the recording start operation was performed.

[0003]

In the conventional recording start operation, it was necessary to predict the sound at the beginning of the next song and perform the recording start operation. The predictive judgment at the start of recording varies greatly depending on the sound source of the source. Even if you predict the sound that will come out and start recording, when the desired sound does not come out, you will record other than the desired sound, and you will also use the recording medium extra. Also, if the sound that was going to be recorded unexpectedly came out, or if recording started after the sound came out and I wanted to record, there was a drawback that the head part was not recorded.

An object of the present invention is to provide a mini disk recorder capable of recording even after the sound to be recorded has elapsed.

[0005]

According to the present invention, in a mini disk recorder for recording a compressed audio signal on a disk, an encoding means for encoding the compressed audio signal and a sound source data encoded by the encoding means are stored. Storage means for storing, a storage capacity control section for controlling writing and reading of sound source data of the storage means, a system control section for transmitting and controlling an operation from the outside, and a storage means for storing input sound source data , A first REC key for performing a recording start operation of the sound source data encoded by the encoding means, and a second REC key for performing a recording start operation of the sound source data read from the storage means. It is a recorder.

[0006]

[Function] Since the second REC key capable of reading out the sound source data stored in the storage means and starting the recording operation is provided,
It is possible to record even after the sound you are trying to record comes out.

[0007]

1 is a block diagram of an MD recorder according to an embodiment of the present invention. In the normal recording operation, when the recording start operation is performed by the normal REC key 1 or the monitor REC key 1a as the key input in FIG. 1, the signal to be recorded is converted into a digital signal by the A / D converter 2. The audio compression / encoding is performed by the audio expansion / compression encoder / decoder 3. The D / A converter 4 digital-analog converts the decoded signal at the time of reproduction and outputs the audio. The vibration-proof semiconductor memory controller 5 writes the data in the semiconductor memory 6, and the vibration-proof semiconductor memory controller 5 sends data to the EFM and the CIRC encoder / decoder 7 simultaneously with the writing operation.

In parallel with this flow, an optical pickup 12 having an objective lens 11 and a recording magnetic head 13 are provided so that the servo controller 8 can start recording by the system controller 10 connected to the display unit 9. Feed motor 14
And the spindle motor 16 to rotate the disk 15. The contents of the data encoded by the EFM connected to the RF amplifier 17 and the address decoder 18 and the CIRC encoder / decoder 7 are written on the disk 15 by the recording magnetic head 13 and the optical pickup 12 via the head drive unit 19.

Next, an embodiment of the present invention will be described with reference to the flow chart shown in FIG. 2 and the time chart shown in FIG. S1 Start of transition processing to stop state (step 1) Indicates the moment when the TOC is read at the place where the entire system is started up or when the stop key is pressed during normal operation to apparently transit to the stop state. . At this time, it is assumed that the display unit 9 in FIG. 1 is displaying the contents indicating the stopped state. This operation shows the time axis 0 in FIG. At this time, it is judged whether or not the set disc can be recorded, and if it is possible, the process proceeds to the next step.

S2 Input voice is converted into compressed data and written in semiconductor memory (step 2) Next, after the sound to be recorded comes out, in order to record the sound (using the monitor REC key), it has passed. Since it is necessary to store the audio data stored in the semiconductor memory, the input audio is converted into audio compression data by the audio expansion / compression encoder / decoder 3 shown in FIG. It is assumed that the memory is sequentially rewritten.

In step S3, it is detected whether the recording key is pressed. (Step 3) Or the normal REC key 1 in the key input unit 1 shown in FIG.
It indicates that the monitor REC key 1a is pressed and the system controller 10 recognizes it. At this time, normal REC
If the key is pressed, the data already written in the semiconductor memory is cleared.

S4 The servo is set to the recording start state (step 4). When the REC key is pressed, the servo is set to the recording startable state on the disk. Further, the data in the memory is read and sent to the EFM and CIRC encoding unit 7 and encoded into an EFM signal. This operation shows time axes 1 to 5 in FIG. That is, focus search, focus servo ON, spindle motor start-up, servo ON, tracking servo ON, and disk recording start position search are performed to start the next recording.

S5 Memory data recorded on disk
(Step 5) The data encoded into the EFM signal is recorded on the disk by the recording magnetic head 13 and the optical pickup 12 via the head drive unit 19 of FIG. During this period, the input voice is written in the semiconductor memory 6. This operation is shown after 5 on the time axis in FIG. 3 (recording start).

Here, as a standard for setting the size of the storage capacity, the operation time up to the start of recording can be classified into four items. The items are "initial setting time", "recording recognition time", "recording operation time" and "recording start time". "Initial setting time" is about 6 seconds depending on the initial situation such as whether or not the disc to be recorded is attached to the set, and 0 seconds when the disc is not required to be attached. The amount of time that can be spent. The "recording recognition time" is a time required for recognizing whether or not a voice comes out and tries to record, and is about 5 seconds.

The "recording operation time" is about 4 minutes before the recording operation is performed after the recognition and recording operation.
When the recording start time is about 1 second after the recording operation and the recording is started on the disc, if the disc is not loaded in the initial state, the "initial setting time" + "recording time" Recognition time ”+“ Recording operation time ”+
“Recording start time” = “6S” + “5S” + “4S” + “1S” = 1
It becomes 6S, and as the capacity to store the voice of the storage capacity,
If you have a capacity of 16 seconds or more, you can record even after the sound to be recorded comes out.

[0016]

According to the present invention, the recording operation can be performed even after the sound to be recorded comes out within the fixed time set by the storage capacity of the semiconductor memory or the like. In addition, the recording start operation while predicting can be performed even after the sound to be recorded comes out, so that it is possible to prevent the recording of a head break or an abnormal head sound.

[Brief description of drawings]

FIG. 1 is a block diagram of an MD recorder showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the MD recorder according to the embodiment of the present invention.

FIG. 3 is a conceptual diagram showing a usage state and a servo state of a semiconductor memory and a time chart thereof according to an embodiment of the present invention.

[Explanation of symbols]

 1 Normal REC key 1a Monitor REC key 2 A / D converter 3 Audio expansion / compression encoder / decoder 4 D / A converter 5 Semiconductor memory controller 6 Semiconductor memory 7 EFM / CIRC encoder / decoder 8 Servo control circuit 9 Display 10 System Controller 11 Objective Lens 12 Optical Pickup 13 Recording Magnetic Head 14 Feed Motor 15 Disk 16 Spindle Motor 17 RF Amplifier 18 Address Decoder 19 Head Drive Unit

Claims (1)

[Claims] 1. A mini disk recorder for recording a compressed audio signal on a disk, and an encoding means for encoding the compressed audio signal, and a storage means for storing the sound source data encoded by the encoding means. A storage capacity control unit that controls writing and reading of sound source data in the storage unit, a system control unit that transmits and controls an operation from the outside, and a unit that holds the input sound source data in the storage unit. , A first REC key for performing a recording start operation of the sound source data encoded by the encoding means, and a second REC key for performing a recording start operation of the sound source data read from the storage means. And a mini disk recorder.