JPS6386179A - Digital data reproducing device having editing function - Google Patents

Abstract

PURPOSE:To make editing work easy and prevent interruption of edition by calculating total time of a desired block designated for edition automatically, and when the total time exceeds desired time, recording only the desired block to the part not exceeding the desired time. CONSTITUTION:A CD 15 is loaded, and a CPU 11 transmits to a servo circuit 19, and reads a table of content TOC and records 12. When a recording time key is operated in a keyboard 13, the CPU recognizes only set time and stores in an area C. Then, the content of an area T1M in which registered musics and number of music selections are recorded is set to '0'. A track number is inputted from the keyboard 13, and time for performance is calculated from a TOC and stored in an area T2. T1+T2 is stored in a area T3, and if it is within C, shifted to T1, and M+1 is stored in TN. In case of excess, TN is not registered, and another designation of TN is waited. Completion of registration of TN is displayed 23. By such constitution, registration is permitted unless total time of designated musics does not exceed set time, and registration of designation of excessive musics is refused. Thus, time control of editing work is made easy.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention specifies several desired blocks in advance from a plurality of blocks of digital data recorded on a recording medium and registers their numbers, etc. The present invention relates to a digital data reproducing device with an editing function that can sequentially reproduce digital data of registered blocks.

(Prior Art) Some recording media that record a plurality of blocks of digital data further record content data as time information to represent the amount of data recorded and the recording position of each block. For example, an audio recording medium CD
(Compact disc) has TOC (Table of Contents) data recorded on its inner circumference, including the total time of all recorded songs, the track number of each recorded song, and start time. Therefore, the CD playback device
By reading and storing TOC data, once a desired song is selected, it can be immediately searched and played. Further, many CD playback devices are equipped with an editing function that stores track numbers of a plurality of desired songs in advance and automatically plays back the desired songs in order according to the stored track numbers. For this reason, when copying a CD to an audio tape or the like as a source, by using the above editing function, flexible tape editing can be easily performed.

Therefore, the configuration for performing the above copying operation will be explained using FIG. 3, taking as an example a case where a CD playback device and a cassette deck are used. In the figure, CPU (11) is built into a microcomputer within the CD playback device. This CPU
(11) controls the CD playback device to a predetermined state via the input/output port (14) according to the operation of the keyboard (13) by a program stored in the memory (12). Therefore, when the CD reproducing apparatus receives a command to start copying from the keyboard (13), it performs a search operation according to the track number previously stored in the memory (12), and after the search is completed, performs the reproducing operation described below.

First, the data recorded on the disk (15) is read by the pickup (16), and is supplied to the processor (18) via the head amplifier (17), as well as to the servo circuit (19) and sent to the pickup (16). Performs focus and tracking servo. The processor (18) demodulates the input signal, separates address data including time information, etc., and outputs it to the input/output port (14).
20) is subjected to rotation servo, and furthermore, the address data is separated and the data is supplied to the DA converter (21). The reproduced signal converted back to an analog signal by the DA converter (21) is sent to the output terminal (22). In addition, the CPU (11) has an input/output port (14)
A predetermined display is made on the display (23) via the display.

On the other hand, on the cassette deck side, the signal input to the input terminal (31) is amplified by the recording/playback amplifier (32).
' Supply to (3B). Here, the logic control circuit (34) displays information on the display (37) according to the status of the keyboard (35) and controls the reel motor (3).
6) and a recording/reproducing amplifier (32) to control the tape running of the cassette tape (38) and the recording operation of the head (33). In addition, when the logic control circuit (34) is set to reverse mode, the reverse mechanism (39) detects the end of the tape.
) to reverse the head (33).

In addition, if the CD playback device and cassette deck are designed as a system, the logic control circuit (34)
It is also possible to enable communication between the CPU (11) and the CPU (11).

In such a configuration, all operations such as registration for editing performed before the copying operation described above are performed by the microcomputer of the CD playback device.

(Problems to be Solved by the Invention) By the way, when actually performing a copying operation, the recording time may be limited due to circumstances on the recording side.

Editing work in such cases must be performed while taking the time into consideration, which is a troublesome work for the user. For example, when copying from a CD to an audio tape that is 30 minutes long on one side, you must register the track numbers while keeping in mind that the total playing time of the selected songs does not exceed 30 minutes. - You will need to perform tasks such as canceling previously registered items.

Also, if this is not done, the song may be cut off in the middle, resulting in unsatisfactory editing.

The present invention has been developed in consideration of the above-mentioned problems, and it facilitates operations when editing work is done within a certain limited time, and also prevents interruptions in editing at undesired portions. An object of the present invention is to provide a digital data reproducing device with an editing function that prevents the above.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the digital data reproducing device with an editing function of the present invention performs data processing from a recording medium in advance every time a desired block to be edited is specified. A means for adding time information corresponding to a desired block based on the read content data, and a means for comparing the added time with a preset desired time and finally adding time information when the added time exceeds the desired time. and means for suspending the registration of blocks specified in the block.

(Operation) According to the present invention, the total time of the desired block specified for editing is automatically calculated by the above means, and if the total time exceeds the desired time, the desired block up to the part that does not exceed the desired time is automatically calculated. You can only register.

(Example) An example of the present invention will be described using FIGS. 1 and 2. In the embodiment shown below, a case is taken as an example in which the digital data playback device with editing function of the present invention is applied to a CD playback device, and the circuit configuration of the embodiment is the same as that of the CD playback device shown in Fig. 3. Therefore, the same figure will also be referred to in the explanation.

FIG. 1 is a flowchart showing execution means in an embodiment of the present invention. To explain according to this flowchart, first, when a disc (15) is inserted into the CD playback device with the power turned on, the CPU (11)
supplies a control signal to the servo circuit (19) and the like, reads TOC data, and stores it in the memory (12) (step Sl). After reading the TOC data, the CD reproducing apparatus enters a standby state and waits for an input operation of any key on the keyboard (IS) (step S2). If the operated key is a key other than the recording time setting key, corresponding processing is performed (steps S3 and S4). For example, in the case of the play key, the performance starts. Note that the recording time setting key is a key for setting the recording time in advance when performing a copy operation, and is a key corresponding to the tape length of the audio tape, or a composite key such as a predetermined key plus a numeric key.

Therefore, if the operated key is the recording time setting key (Yes in step S3), the CPU (11) recognizes the set time and stores it in the storage area C of the memory (12) (step S5). Subsequently, the contents of area T1 where the total performance time (memory total) of the registered songs is stored and area M where the number of registered songs (memory number) is stored are each reset to 0 (step SS
, S7).

Next, the state enters a waiting state for song designation (step S8), and when the track number TN is input from the keyboard (13), the playing time of that song is entered into the TO memory stored in step S1.
Calculated using C data, area T of memory (12)
2 (step S9).

The method for calculating the performance time TNt1a+e of multiple songs is T
.

Contents of C data, that is, multi-track start time TOC (TN)
From the total performance time TOC(S) of all songs, the following equation is obtained.

TNtime -TOC(TN+1) -TOC(T
N) ...(1)TNtlme-TOC(S)
-TOC(TN) ・(2) However, formula (2)
is the calculation formula when TN is the maximum track number on the disc. Furthermore, when considering the search time during the copy operation or inserting a certain time between songs, a predetermined time may be added to the above calculation result.

Subsequently, the contents of storage areas T1 and T2 of the memory (12) are added and stored in storage area T3 (step 51).
0). That is, the total time of the performance time of the registered song and the performance time of the newly designated song is calculated. Then, the contents of the storage area T3 and the C stored in step S5 are
If the contents of T3 do not exceed the contents of C, that is, the total time of the specified song does not exceed the set time, move the contents of T3 to the storage area T1 (Step 512). , the memory number of storage area M is incremented by 1 (step 513), and step S is added to the storage area MA (M) corresponding to that memory number.
The track number TN specified in step 8 is stored (step 514). At this point, the song with track number TN has been registered.

Here, if the registration end key is operated (step S1
5), the registration operation is completed; otherwise, the operations from step 88 onwards are repeated.

In addition, in the comparison in step S11, if the total time of the designated songs exceeds the set time (Yes in step S11)
), the processing in steps S12 to SL4 is not performed, that is, the (last at that point) track number TN input in step S8, which caused the set time to be exceeded.
is not registered, and waits for an operation to end the registration in step S15 or for designation of another track number.

Note that the user is informed by the display (23) whether the specified track number has been registered or not.

By doing this, in this embodiment, registration is permitted as long as the total time of the specified song does not exceed the set time, and registration is refused if the specified song exceeds the set time, so editing operations This makes it easier to manage your time.

In this embodiment, the copy operation after registration is to sequentially read out the track numbers stored in the storage area MA (M) of the memory (12) starting from M-1, and play back the songs with the read track numbers in order. It turns out.

Next, another embodiment of the present invention will be described using FIG. 2. It should be noted that the parts in this embodiment that are common to the previous embodiment are given the same step numbers in FIG. 2 as in FIG. 1, and the description thereof will be omitted. In this embodiment, if the comparison result in step Sll is Yes, that is, if the total time of the specified song exceeds the set time, the display (2
3) to notify the user (step 52).
1) If the user attempts to register knowingly,
Upon receiving a predetermined operation (key operation, etc.) (Yes in step S22), the registration operations in steps S12 to SL4 can be executed. In this way, as in the previous embodiment, time management during editing operations is facilitated, and editing operations that respect the user's intentions are made possible.

The embodiments of the present invention have been described above, but the present invention
It goes without saying that the present invention is not intended only for D playback devices, and the present invention is not limited to the above-described embodiments but can be modified in various ways.

[Effects of the Invention] As explained above, the digital data reproducing device with an editing function of the present invention facilitates operations when performing editing work within a certain limited time, and prevents editing in undesired portions. It is possible to prevent breakage, etc.

[Brief explanation of the drawing]

FIG. 1 is a flowchart for explaining the execution means in one embodiment of the present invention, FIG. 2 is a flowchart for explaining the execution means in another embodiment of the invention, and FIG.
The figure is a block diagram showing an outline of a copy system using a digital data reproducing device with an editing function. 11...CPU, 12...Memory,
13...Keyboard, 81~SL5. S21. S22...Operation step of execution means.

Claims (1)

[Claims] means for reading said data from a recording medium in which a plurality of blocks of digital data and content data representing time information for each block of said digital data are recorded; means for storing said read said content data; means for specifying and registering a desired block; means for setting a desired time; means for extracting time information corresponding to the specified desired block from the content data; and means for specifying the extracted time information as the desired block. and a means for adding the desired block every time a desired block is specified, and comparing the added time and the desired time every time a desired block is specified, and registering the last specified desired block if the added time exceeds the desired time. 1. A digital data reproducing device with an editing function, characterized in that it is provided with means for suspending data.