JPH01227289A - Elapsed time displaying method - Google Patents

Abstract

PURPOSE:To correctly display elapsed time even with a few communication lines by delaying a reproducing signal read from a recording medium by a prescribed time, outputting it and sending an elapsed time display start signal to an operation/display part by a player main body. CONSTITUTION:A main processor 13 of a player main body 1 delays the reproducing signal read from the recording medium by a prescribed time (n) seconds and outputs it to an acoustic circuit 4. At the same time, an elapsed time display start signal MST is sent to an operation/display part through a communication line 3. A sub-processor 21 of the display part 2 times the elapsed time by using a clock signal outputted by a clock signal generator 22 after (s) seconds passes after the display start signal MST is received, and displays it on a display part 23 through a display driver 24. Consequently, when a display start signal transfer time is (m), by making s=n-m, the actual elapsed time can be made to coincide with the display time.

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a method for displaying elapsed time, and is particularly applicable to audio devices and AV devices in which an operation/display section and a player body are connected via a communication line. The present invention relates to an elapsed time display method suitable for application to equipment.

<Prior Art> In a CD player, control data called subcoping is recorded for each predetermined frame along with an audio signal in the program area (area where songs are recorded) of a compact disc.

Then, in the subcoding, the P channel indicates the beginning of the song, and the Q channel indicates (1) song number, (2) index (indicates the text of the song, etc.) according to the current position of the pickup. 3) The elapsed time (performance time) and frames from the beginning of the song number, (4) the absolute elapsed time from the beginning, etc. are specified and displayed on the display section of the operation panel as appropriate.2) reactor. Figure 4 shows the recording status of the gorogram area (schematic diagram).
i (i = 1.2. . . ) is from time Ts to time T5. Each song is recorded with a predetermined interval between each song. In addition, subcoding is recorded for each predetermined frame, and the song numbers (01
, 02, 03, ...), each episode is divided into several movements, and the index 00 is specified between songs and for each movement.
．． 01. ...is instructed. Furthermore, the Q channel of subcoding indicates the elapsed time for each song (P time) and the elapsed time from the beginning (A time).

Now, in an integrated device where the CD player body and the operation/display section are sub-parts of one control microcomputer, if data such as elapsed time is sent from the signal processing section, the control microcomputer will immediately receive this information without delay. can be displayed on the display.

Therefore, there is no difference between the actual elapsed time of the song and the displayed elapsed time.

However, recently, a configuration was proposed in which the operation/display section (operation panel) and the booya main body were installed apart from each other, and a wire was connected between them. For example, C
D: A CD device with a t-changer, an audio device with a centralized operation/display section, or an AVI device.

In such separately installed equipment, the larger the number of communication lines, the better in terms of communication volume and communication speed, but the smaller the number is better in terms of cost, noise, installation dimensions, and installation method, and the latter is preferred. . Then, the control microcomputer in the main unit of the printer gives priority to human power, etc., rather than display.

For this reason, the elapsed time (P time) of a song cannot be displayed accurately in terms of time. In other words, the P time display is 70. '0
(It takes more than 1 second to change from J to = 0.01j,
There is a gap of 1 second or more between the actual elapsed time and the displayed elapsed time, making it impossible to accurately display the elapsed time. Therefore, conventionally, the elapsed time is not displayed on the display section, and only disk NO0 and rack NO0 are displayed.

<Problems to be Solved by the Invention> However, in such a conventional display, the elapsed time of the song is not 8, and the display only shows the disc number 0 and track number 9.
It does not look like a CD player, in other words, it loses its high-end image, and it is inconvenient to make copies because the playing time is not known, and furthermore, it is frustrating because the playing time is not known.

From the above, an object of the present invention is to provide a method for displaying elapsed time that can accurately display elapsed time even with a small number of communication lines.

Means for Solving the Problems> FIG. 1 is a block diagram of a separately installed CD device according to the present invention.

1 is the player body, 2 is the operation/display section, 3 is the communication line, 4
is an acoustic circuit, 12 is a signal processing section, 13 is a control microcomputer (main processor), 21 is a control microcomputer (subprocessor), 22 is a clock signal generator,
23 is a display section.

The operation/display unit 2 is installed apart from the player body 1,
They are connected to each other via a communication line 3.

Function> The player main body 1 delays the reproduction signal read from the recording medium by a predetermined time of n seconds and outputs it to the audio circuit 4, and also sends an elapsed time display start signal (song start signal) MST to the operation/display section 2. The processor 21 of the operation/display section 2 measures the elapsed time using the clock signal of the operation/display section 2 after S seconds have elapsed after receiving the display start signal MST, and displays it on the display section 23.

<Embodiment> FIG. 1 is a block diagram of a CD Goleya according to the present invention.

1 is the player body, 2 is the operation/display section, 3 is the communication line, 4
5 is an acoustic circuit consisting of a DA converter, a low-pass filter, a low-frequency amplifier, etc., and 5 is a speaker. Operation/display section 2!
It is installed far away from the player body 1, and connected to the communication line 3.
They are connected to each other so that they can send and receive signals.

In the player body 1, 11 is a pickup, 12 is a chair processing section, 13 is a control microcomputer (main processor), and 14! A clock signal generator 15 generates a system clock for the main processor, and a static R signal generator 15 delays digital audio data by n seconds.
AM (hereinafter simply referred to as RAM) and 16 are digital filters.

The pickup 11 optically reads the digital information recorded on the compact disc and transmits the RF signal (not shown).
The signal is input to the signal processing section 12 via an amplifier. The signal processing unit 12 (i) demodulates the input ETF signal and separates audio data and sub-coding, (11) performs error detection/correction processing on the audio data and stores it in the RAM 15,
Then, the acoustic data stored n seconds ago is read from the RAM and inputted to the digital filter 16, and one sub-coding is further inputted to the main processor 13 without delay.

The main processor 13 analyzes the sub-coding Q channel and immediately sends signals MST and MSP to the operation/display unit 2, indicating the current song number of the mortar, the start of the song 9, and the end of the song. Note that the song begins when the subcoding index becomes "01," and the song ends when the index becomes "00."

The digital filter 161 performs a predetermined filtering process on the input acoustic data, inputs it to the acoustic circuit 4, and outputs an acoustic signal from the speaker 5.

In the operation/display section 2, 21 is a control microcomputer (subprocessor) for display and operation, 22 is a clock signal generator that generates a system clock for the processor, and 23 is a device that displays the current song number, playing time, etc. a display section to display;
24 is a display driver, and 25 is an operation unit in which various keys are arranged.

Note that the clock signal generators 14 and 22 each include crystal oscillators 14a and 22a and a pulse generator (inverter) 14b.
, 22b.

FIG. 2 is a flowchart of the processing on the player main body side in the present invention, and FIG. 3 is a flowchart of the processing of the subprocessor of the operation/display section. The flowchart, on the right side, is the flowchart of the main processor 13.

The signal processing unit 12 takes in the digital data read from the CD by the pickup 11 (step 101).
), after error detection and correction processing is performed on the digital data, the sub-coding is sent to the main processor 13 (steps 102 and 103), and the acoustic data is statically R
At the same time as storing it in the AM 15, the acoustic data stored n seconds ago is read from the RAM, and the acoustic data is input to the acoustic circuit 4 via the digital filter 16 (104.1
05). As a result, the sound is output to the sound field with a delay of n seconds after being played.

Thereafter, the signal processing section 12 performs the signal processing from step 101 until the reproduction operation is completed, and ends the signal processing upon completion of the reproduction operation (step 106).

On the other hand, the main processor 13 is performing predetermined processing necessary for playback operation (step 201), and when subcoding is input, it checks whether the index included in the subcoding is 701 (step 202).
If "01.", a music start signal (elapsed time display start signal) MST is immediately sent to the sub-processor 21 of the operation/display section 2 (step 203), and the process returns to step 201.

However, in step 202, the index is “01
If it is not "700", it returns to step 201, and if it is "00", it is the end signal of the song (elapsed time display stop signal) M S P ? !
The information is sent to the operation/display unit 2 (step 205), and the process returns to step 201.

On the other hand, when the sub-processor 21 of the operation/display unit 2 receives the elapsed time display start signal MST from the main processor 13, the sub-processor 21 uses the clock signal generated from the clock signal generator 22 after S seconds have elapsed after receiving the elapsed time display start signal MST. Measure the elapsed time by 70. Starting from OOJ (steps 301, 302
). Note that the elapsed time display is initially ro, 03. Also, the relationship between the delay time of the sound W signal (n seconds) and the delay time of 8 seconds for starting elapsed time measurement is as follows, assuming that the delay time from when index 701 is detected to being notified to the subprocessor 21 is m seconds. n=m÷S. In other words, n
The time measurement start delay time S is determined so that = m + s holds. However, the above equation does not necessarily have to hold true strictly.

The sub-processor 21 measures the elapsed time T and checks whether a predetermined period of time, for example 1 second, has elapsed (step 303).
, the elapsed time T is displayed on the display unit 23 via the display driver 24 (step 304).

After that, check whether the song end signal (stop display of elapsed time (number i) MSP) has been sent (step 305), and if not, repeat the process from step 302 onwards to display the elapsed time. If the elapsed time has been sent, the elapsed time is reset to "rOooo" and the elapsed time display process is ended (step 306).

Although the case of a CD device has been described above, the present invention can be similarly applied to a DAT device, AV equipment, etc.

Also, the above is the case of elapsed time display during play, but when forwarding or fast reversing is applied, if the fast forward is designed to be n times faster, the elapsed time will be displayed every time 1/n (seconds) elapses. Increments or decrements the display by 1 second. Then, when the play is restarted, the main processor 13 sends the elapsed time (P time) at that point to the sub-processor 21, and the sub-processor 21 calculates the elapsed time from step 301 in FIG. 2 based on the elapsed time. Perform display processing.

In the above, the elapsed time display start signal MST and the elapsed time display stop signal MSP are operated from the player main body side 1 and displayed on the display unit 2.
In this case, the sub-processor 21 measures and displays the elapsed time using a clock (no. 13 to the operation/display section 2, and then displayed on the display section 23 after an 8-second delay.In other words, the signal processing 1i12 of the booker main body 1 processes the audio data out of the captured digital data. At the same time, the main processor 13 sends the P time (elapsed time) included in the sub-coding to the operation/display section 2, The processor 21 is configured to display the elapsed time on the display unit 23 after s (=n−m) seconds have passed after receiving the elapsed time.

<Effects of the Invention> According to the present invention, the player main body outputs the playback signal read from the recording medium with a predetermined delay of n seconds, and also operates and outputs the elapsed time display start signal without delay.
This is because the processor of the operation/display section measures the elapsed time using the clock signal of the operation/display section after S seconds have passed after receiving the display start signal, and displays the elapsed time on the display section. , YabaS where the transfer time of the display start signal is m
By setting = n - m, it is possible to match the actual elapsed time with the displayed time.

Further, according to the present invention, the number of communication lines can be reduced without considering the transmission of elapsed time data, and therefore the outer shape of the communication line group can be made thinner, and installation can be made easier, and cost is reduced; Daure 1. Noise can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a separate CD device according to the present invention, Fig. 2 is a flow chart of processing on the player main body side, Fig. 3 is a flowchart of the first section of processing on the operation/display side, and Fig. 4 is a block diagram of a separately installed CD device according to the present invention. FIG. 3 is an explanatory diagram of subcoding. 1. Player body, 2. Operation/display section, 3. Communication line, 4. Sound circuit, 11. Pickup, 12. Signal processing section, 13. Main processor, 15. Status RAM. 21...Subprocessor, 22...Cock signal generator, 23...Display unit, Patent applicant A: Agent for Vine Co., Ltd.
Patent Attorney Wi Fuji Chiki Figure 2 Figure 3

Claims (5)

[Claims] (1) In a method for displaying elapsed time in a device in which the operation/display unit and the player body are connected via a communication line, the player body outputs the playback signal read from the recording medium with a predetermined delay of n seconds, and An elapsed time display start signal is sent to the operation/display unit, and the processor of the operation/display unit measures and displays the elapsed time using the clock signal of the operation/display unit s seconds after receiving the display start signal. A method for displaying elapsed time characterized by displaying the elapsed time in a section. (2) If the transfer delay time of the display start signal is m seconds, then s=
The elapsed time display method according to claim 1, characterized in that the elapsed time is displayed as nm. (3) The processor of the player body sends an elapsed time display stop signal to the operation/display unit via the communication line, and the processor of the operation/display unit resets the elapsed time display based on the display stop signal. A method for displaying elapsed time according to claim 1. (4) The elapsed time is the playing time of the song, the display start signal is sent to the operation/display section at the beginning of the song, and the display stop signal is sent to the operation/display section at the end of the song. An elapsed time display method according to claim 3. (5) In a method for displaying elapsed time in a device in which the operation/display section and the player body are connected via a communication line, the player body transfers the elapsed time read from the recording medium to the operation/display section, and The elapsed time is characterized in that the reproduced signal read from the elapsed time is output after being delayed for a predetermined time by n seconds, and the processor of the operation/display unit displays the elapsed time on the display unit after s seconds have elapsed after receiving the elapsed time. Display method.