JP2615859B2 - Recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention divides a recordable area of a disk-shaped recording medium into a plurality of blocks for each data recording amount for recording data of a predetermined data amount, The present invention relates to a recording apparatus that records data on a disk-shaped recording medium capable of recording a predetermined amount of data as a whole by recording data on the plurality of blocks.

[Conventional technology]

Based on the Still Video Floppy standard established by the Still Video Floppy Roundtable, not only video but also audio can be recorded. In that standard, audio is time-compressed, FM modulated, and magnetically recorded on one or more tracks of a video floppy.
The time compression rate is 3 for 525 lines and 60 fields.
The recording time per track is about 5 seconds, about 10 seconds, and about 20 seconds, respectively. When an audio signal is recorded over a plurality of tracks, a group of the series of audio signals is called a sequence. In the still video floppy, images or sounds can be arbitrarily recorded on each of the 50 tracks.

2. Description of the Related Art Conventionally, in this type of recording / reproducing apparatus, at the time of audio recording or standby for audio recording, it is checked whether all tracks of the still video floppy have been recorded or not, and the number of remaining recordable tracks or the recorded / unrecorded state. Is displayed in the form of a map. For example, figures or symbols (for example, "bar" or "block") equal in number to the number of recorded tracks or the number of remaining tracks that can be recorded
There is a display method in which a track is displayed as a graphic, or a recorded track and an unrecorded track are distinguished by different symbols or figures, or turned on or off, and all tracks are displayed.

[Problems to be Solved by the Invention]

However, when a recording medium having a large number (50) of tracks, such as a still video floppy disk, is used, a wide display area is required, and it tends to be visually complicated. In particular, in the case of recording narration by inputting a narration from a microphone or the like, since the voice is recorded while reading the original, it is difficult for the user to visually recognize the number of remaining tracks on the display as in the conventional example. There is a disadvantage that.

In order to solve this, as shown in FIG. 6, a method of displaying the number of remaining tracks in figures or symbols in units of, for example, 10 tracks may be considered. There is a disadvantage that the number of tracks cannot be accurately grasped.

Therefore, an object of the present invention is to provide a recording apparatus having a function of appropriately displaying the data recordable capacity remaining on a disk-shaped recording medium.

[Means for Solving the Problems]

The recording apparatus according to the present invention divides the recordable area of the disk-shaped recording medium into a plurality of blocks for each data recording amount for recording data of a predetermined data amount, and separates data for each of the plurality of blocks. An apparatus for recording data on a disk-shaped recording medium capable of recording a predetermined amount of data as a whole by recording, detecting information indicating a data recordable capacity remaining on the disk-shaped recording medium. Information holding means for holding, and display means for non-linearly displaying information on the data recordable capacity indicated by the information held in the information hold means in accordance with the amount of the data recordable capacity. Features.

[Action]

According to the above-described means, the data recordable capacity remaining on the disc-shaped recording medium is displayed in an easy-to-understand manner depending on whether it is large or small.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In this embodiment, information on the number of remaining tracks on the magnetic disk is displayed by using a normal reproducing circuit for reproducing a magnetic disk which is a still video floppy disk.

In FIG. 1, 10 is a system controller, 12 is a magnetic disk 12, 14 as a recording medium, a reproducing head, 16
Is a spindle motor for rotating the magnetic disk 12, 18
Is a sensor for detecting the PG yoke of the magnetic disk, 19 is a preamplifier, 20 is an FM demodulation circuit, 22 is a de-emphasis circuit,
Reference numeral 26 denotes a video reproduction circuit that outputs a standard television signal. 28 is an audio signal de-emphasis circuit, 30 is an A / D converter, 32 is an audio memory, 34 is a D / A converter, and 36 is a D / A converter
This is a decoder that decodes the analog output and performs noise reduction processing. 38 is a flag detection circuit for detecting a start flag and a stop flag, 40 is a control code detection circuit for detecting a control code, 42
Is the address for outputting the write address signal of the audio memory.
A counter 44 is an address counter for outputting a read address signal of the audio memory.

46 is a timing signal generation circuit that outputs various timing signals in accordance with the rotation phase signal from the sensor 18; 48 is a memory that holds recorded / unrecorded track information of the magnetic disk 12 and a variable that holds a calculation variable to be described later; , 52 is an oscillator, 5
6 is a display device for performing visual display, and 58 is a switch for inputting various instructions. Reference numeral 60 denotes a head drive circuit that moves the head 14 in the radial direction of the magnetic disk 12, 62 denotes an ID demodulation circuit that demodulates an ID signal included in the reproduction output of the reproduction head 14, and 64 denotes an empty track detection circuit that detects an empty track. It is.

The operation will be described with reference to FIGS. 2A, 2B and 3. After the initialization (S1), the system controller 10 initializes necessary variables K, M, N and L (1) to L (7) and stores them in the memory 48 (S2). Next, when it is confirmed that the magnetic disk 12 is loaded or that the magnetic disk 12 is loaded (S3), the spindle motor 16 is rotated to check the recording state of the magnetic disk 12, that is, the use state.
First, the magnetic head 14 is sequentially positioned from the first track to the last (50th) track of the magnetic disk 12 by the head drive circuit 60, and each track is searched (S4).

Specifically, the output of the head 14 is passed through the preamplifier 19
FM demodulation circuit 20, ID demodulation circuit 62 and empty track detection circuit 64
The system controller 10 determines whether this track has been recorded or not recorded from the empty track detection signal output of the empty track detection circuit 64. The system controller 10 also sets an empty track code in the case of an unrecorded (empty track) and stores it in the memory 48 together with the track number. It is determined whether or not the recording signal of this track is a video, and if it is a video, it is further determined whether it is a field recording or a frame recording, and a field track code or a frame track code is set, respectively. Store. If it is not video, it is determined whether or not it is audio. That is, the output of the FM demodulation circuit 20 passes through the de-emphasis circuit 28 and is applied to the flag detection circuit 38 and the control code detection circuit 40, and the system controller 10 controls the flag detection circuit 38 and the control code detection circuit 40. From the output, it is determined whether or not the track is an audio track (a track on which an audio signal is recorded). In the case of an audio track, an audio track code is set and stored in the memory 48 together with the track number.

When this series of operations is performed for each track, the memory
48 stores information on recorded / unrecorded, audio / video, and field / frame for video in each track.

After the information of the recorded contents of all the tracks of the magnetic disk 12 is stored in the memory 48 in this manner, the system controller 10 checks the number of empty tracks from this data of the memory 48 and substitutes it for a variable K ( S5).

When the operator selects and instructs the recording operation by the mode setting switch included in the switch device 58, the system controller 10 checks the empty track number variable K, and when K is 0, displays "recording disabled". To end the operation (S1
9) If it is not 0, calculation and display for displaying the number of empty tracks K are performed (S8). FIG. 3 shows a detailed flowchart of this calculation and display.

In FIG. 3, first, the system controller 10 reads the K value and the initial setting value N (= 7) from the memory 48, and further reads L (N), that is, L (7). And M =
The calculation of KL (N) is performed (S31), and it is checked whether M is 0 or more (S32). As long as M is negative, N is decremented (S33, 34) and M is recalculated. As a result, N that gives the latest L (N) less than the number K of empty tracks can be known. From this N, N blocks are image-displayed (S35).

That is, when K is 0, no block is displayed and K
Is 1, if one block, 2 ≦ K <5, 2
Blocks, if 5 ≦ K <10, 3 blocks, 10 ≦
If K <15, four blocks are displayed, if 15 ≦ K <25, five blocks, if 25 ≦ K <50, six blocks, and if K is 50, seven blocks are displayed.

Returning to FIG. 2A again, when the display is performed in S8, the switch group
Wait for operation of the 58 start switch (S9). When the start switch is pressed, the input audio signal of the audio input terminal is sequentially written to the audio memory for time axis compression (S10). During the writing, the stop switch of the switch group 58 and the next track are written. It is checked whether or not the track changeover switch for instructing the changeover is pressed (S11, 12). If it is pressed, recording on the magnetic disk is executed (S14). If not, writing to the audio memory is performed. When the amount reaches the predetermined amount (S12), recording on the magnetic disk is performed (S14).
This recording system and its signal processing itself are known.

When a signal is recorded on one track in S14, the system controller 10 subtracts 1 from the number K of empty tracks (S15), and performs a calculation display shown in FIG. 3 based on the new K (S16). . For example, if K is 5 before recording in S14, the number of display blocks, that is, N is 3. S15
, K becomes 4, and when recalculated in the calculation display routine of FIG. 3, N becomes 2, and two blocks are displayed.

Thus, every time recording is performed on the magnetic disk, the calculation display routine of FIG. 3 is executed to update the display of the number of empty tracks. Of course, if the recording is erased, the number of empty tracks will increase.
The calculation display routine shown in the figure is executed to update the display of the number of empty tracks.

After updating the display of the number of empty tracks in S16, it is determined whether or not recording on the magnetic disk continues to the next track (S1).
7) If it does not continue, display the end of recording and end the recording operation. Also, when continuing to the next track,
It is checked whether or not K is 0 (S18). If K = 0, there is no empty track, so that recording is not possible and the process is terminated.
If so, the process returns to S10, and the routine following the capture to the audio memory is continued.

Note that when performing the above-described audio recording operation, audio dubbing can be performed by reproducing and displaying the corresponding image. In this case, the reproduction operation of the corresponding video track is performed immediately before writing to the memory in S10.

By setting any non-linear numerical value in L (1), L (2),..., L (7), the number of remaining recordable tracks can be displayed in a non-linear unit. In the present embodiment, N = 7, but N corresponds to the maximum number of blocks to be displayed, and therefore may be set according to the number of possible displays on the display device 56. If the value of L (i) [i = 1 to N] is set by a logarithmic function, the number of remaining recordable tracks can be efficiently displayed. FIG. 7 shows the case where N = 6. In this case, L (1) = 1, L (2) = 2, L (3) = 5, L (4) = 10,
L (5) = 25 and L (6) = 50.

FIG. 4 shows a flowchart in the case where the flowchart of FIG. 2B is modified so that recording of a video signal is also performed at the same time. After starting writing to the voice memory (S10),
It is determined whether or not to perform video recording (S40). If not, the procedure is the same as that in FIG. 2B. However, when performing video recording, it is determined whether to perform field recording or frame recording. Investigation (S41), in the case of field recording, after the track movement, field image recording is performed (S42), 1 is subtracted from K (S43), and the track is moved to perform audio recording (S14). In the case of frame recording, after moving the track, frame image recording is performed (S44).
Subtract 2 from K (S45), start the track, and perform audio recording (S14). Steps after S14 are the same as those in FIG. 2B.

As described above, in the present embodiment, the information on the data recordable capacity remaining on the disc-shaped recording medium is displayed in a non-linear manner according to the amount of the data recordable capacity (for example, compression according to a logarithmic function). Display, etc.), when the data recordable capacity is small and caution is required when performing new data recording, information on the data recordable capacity is displayed in detail and the data recordable capacity is reduced. If there is no need to pay attention when performing new data recording, information on the data recordable capacity is coarsely and roughly displayed. Display can be performed, and more information can be effectively displayed in a small display area.

〔The invention's effect〕

As described above, according to the present invention, it is possible to provide a recording apparatus having a function of appropriately displaying the data recordable capacity remaining on a disc-shaped recording medium.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the construction of an embodiment of the present invention, FIGS. 2A and 2B are operation flowcharts of FIG. 1 for displaying the number of remaining recordable tracks, and FIG. S8
FIG. 4 is a flowchart of a calculation display routine of S16 in FIG. 2B, FIG. 4 is a modified example of FIG. 2B, FIG. 5 is a division example for non-linear display, FIG.
FIG. 7 shows an example of display by blocks in this embodiment. 10 ... System controller, 12 ... Magnetic disk,
14… Read head, 16… Spindle motor, 18 ……
PG sensor, 62: ID demodulation circuit, 64: Empty track detection circuit, 48: Memory, 56: Display device, 58: Switch group

Claims (1)

(57) [Claims] 1. A recordable area of a disk-shaped recording medium is divided into a plurality of blocks for each data recording amount for recording data of a predetermined data amount, and data is recorded on each of the plurality of blocks. Thus, an apparatus for recording data on a disk-shaped recording medium capable of recording a predetermined amount of data as a whole, detecting and holding information indicating a data recordable capacity remaining on the disk-shaped recording medium An information holding unit; and a display unit for non-linearly displaying information on the data recordable capacity indicated by the information held in the information hold unit in accordance with the amount of the data recordable capacity. Recording device.