JP2548169B2 - Control method of information recording medium reproducing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a control method of an information recording medium reproducing apparatus such as a video disc player and a VTR.

Background Art Optical or electrostatic or magnetic information recording media (hereinafter simply referred to as recording media) such as video discs for video or audio information that complements articles in publications such as encyclopedias and manuals.
To supplement the contents of the publication.

In such a case, a code such as a so-called bar code is printed together with the article of the publication in order to clarify the correspondence between the article of the publication and the recorded information of the recording medium or to predetermine the reproduction mode of the recording medium information suitable for the article content. If a means for reading the print code is provided in the information recording medium reproducing apparatus and the print code is input to the information recording medium reproducing apparatus as necessary, the information recording medium reproducing apparatus is designated by the print code. The recording medium is played in a manner. Regarding this method, the applicant of the present invention has applied the Japanese Patent Application No.
It has already been proposed in 043132.

On the other hand, the structure of the interleaved 2 of 5 type bar code, which is widely used at present, is a set of unit codes composed of even digits of decimal digits sandwiched between start and stop marks. Then, for each unit code, play command, pause command, frame advance command,
And the like, the commands for designating the operation mode, the commands for specifying the range of reproduction, the commands for executing the video reproduction, the audio reproduction, the stereo-monaural selection command, and the like are associated with each other.

For example, when an instruction having a content of “search chapter 10 and perform stereo playback together with video playback” is represented by a barcode, The mark indicates a unit code. Each unit code is usually
It is a two-digit decimal number sandwiched between start and stop marks. In this case, eight unit codes are required, and the barcode as a whole has a considerable length, which may occupy a large printing space or require a large-capacity buffer memory.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an information recording medium reproducing apparatus control method capable of expressing an information recording medium reproducing apparatus control command with a code signal having a small number of digits.

In the information recording medium reproducing apparatus control method according to the present invention, in reading the print code signal and determining the content of the code signal, the total number of digits of the read code signal and the content of each digit are sequentially detected and detected. The control command is identified by the total number of digits and the content of each digit.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an information recording medium reproducing device and a control device for executing the control method of the information recording medium reproducing device according to the present invention. In the figure, in the playing section of a video disc player as an example of the information recording medium reproducing apparatus,
The video disk 2 is rotated by a turntable (not shown) rotated by the spindle motor 1. It is well known that there are CAV type and CLV type video discs. Further, it is natural that not only a video disk but also a so-called compact disk and other information recording disks can be used. The pickup 3 is carried by a slider (not shown) that is moved in the radial direction of the turntable by a slider motor 4, and the information detection point (reading spot in the case of an optical type) of the pickup 3 is freely movable in the radial direction of the disc 2. Positioned. Various servo systems such as a spindle servo system, a tangential servo system, and a tracking servo system are provided, but are not shown because they are well known.

A so-called RF signal obtained from the pickup 3 is divided into an audio channel component and a video channel component by a first filter 5 which passes only an audio channel component and a second filter 6 which passes only a video channel component, and is respectively divided into first and second demodulations. The circuits 7 and 8 demodulate into an audio signal and a composite video signal, and further, an audio reproduction processing circuit 9 and a video reproduction processing circuit.
According to 10, the L and R channel audio signals are output to the L and R channel terminals and are supplied to the monitor screen display as video signals.

From the composite video signal, so-called V-sync, H-sync and other control signals are separated and extracted by a signal separator 12 and supplied to a CPU 13 as control means. The CPU 13 performs an arithmetic operation based on data or a program stored in a memory 15 such as a ROM or a RAM in response to a command input from an operation unit 14 such as a keyboard, and then performs an audio reproduction processing circuit 9, a video reproduction processing circuit 10, A control command is supplied to the playing section control circuit 16. Further, the barcode 18 printed in the article of the book 17 can be read by the scanner 19, and the code signal from the scanner 19 is detected by the detector 20 and supplied to the CPU 13.

The CPU 13 decodes the code signal obtained from the scanner 19 and supplies command signals such as play, pause, frame advance, and search to the performance section control circuit 16, and further turns on / off the audio reproduction processing circuit. A command, a monaural / stereo designation command, or a current status maintenance command is supplied, and an on / off command or a current status maintenance command is supplied to the video reproduction processing circuit.

In the present invention, the correspondence between code signals and instructions is determined as follows.

1) Independent instructions Is a code signal including a list of four-digit numbers (0 to 9). Here, N1 is the target reader (operator)
ID code that identifies If the ID code is not required, it is fixed to zero, for example. N2 and N3 are two-digit decimal numbers indicating the contents of an instruction. N4 is a checksum, which adds the numerical values from N1 to N3 in decimal and makes them equal to the last digit of the numerical value of the addition result.

An example of the correspondence between the independent instruction code and its content is listed below.

2) Chapter search command Is a code signal composed of a series of six-digit numbers (0 to 9) represented by Here, N1 is an ID code for identifying a target reader (operator). Correction or change is made in the CPU 13 with respect to the contents of the digits representing the instruction contents according to the contents of the ID digits. When the ID code is unnecessary, it is fixed to, for example, zero. N2 and N3 are two-digit decimal numbers indicating the chapter address of the search destination. N4 and N5 are codes representing an accompanying instruction that does not specify the operation mode of the performance section but specifies the reproduction mode of the signal system. For example, the values of N4 and N5 can be associated with the associated instructions as follows.

N6 is a checksum, which is equal to the last digit of the numerical value obtained by decimally adding the numerical values from N1 to N5.

3) Chapter playback instruction Is a series of eight-digit numbers (0 to 9) represented by. The rules for the N1 digit are the same as in the above (1) and (2). N2 and N3 are 2-digit decimal numbers and indicate the start chapter address of the section to be searched and reproduced. N4 and N5 are 2 digits 1
This is a decimal number and indicates the address of the last chapter of the section to be searched and reproduced. N6 and N7 represent auxiliary commands similar to those in the above (2). N8 is a checksum, which is obtained by adding the numbers from N1 to N7 in decimal and taking the last digit. Therefore, for example, in the case of an instruction to reproduce the chapter 3 in stereo and stop at the beginning of the chapter 4,
It becomes 4939. The content of the ID digit is related to the content of the digit representing the command content by correction or change parameters.For example, the target operator is classified into beginner, intermediate, and advanced, and the ID digit Arrange that the contents of the instruction content digit have different meanings depending on the contents. For example, if the instruction code that defines the chapter playback range for beginners is a chapter playback instruction from chapter 2 to chapter 4, the same instruction code will be used when the ID digit is a code indicating that the user is an advanced player. Even if they are the same, it is conceivable that the CPU 13 determines that they are chapter reproduction commands from chapter 1 to chapter 5.

4) Frame search instruction It is a series of 10-digit numbers (0 to 9). Where N1, N2
Is an ID code digit. If not needed, fix to zero.
N3, N4, N5, N6, and N7 are search destination frame addresses, which are 5-digit decimal numbers. N8 and N9 are attached instruction codes, and are according to the above attached instruction code table. N10 is a checksum and adds the numbers N1 to N9 in decimal to make it equal to the last digit. For example, the command to search the frame address 23100 and make the audio stereo while keeping the video as is 0023100938.

5) Segment playback instruction It is a list of 14 digit numbers (0-9). N1 is an ID digit, but is fixed to, for example, zero when unnecessary. N2, N3, N
4, N5 and N6 indicate the first frame addresses of the segments (sections) to be searched for in 5-digit decimal numbers. N7, N8, N9, N
10, N11 is the last frame address of the segment (section) to be searched and reproduced with a 5-digit decimal number. N12 and N13 are digits indicating the associated instruction code. N14 is a checksum, and adds the values from N1 to N13 to take the last digit.
For example, in the case of an instruction to search for the frame address 23100 and play it up to the number 23500, and to keep the video as it is and the audio as 2 / R, it becomes 02310023500927.

When controlling the information recording medium reproducing device and the reproduction signal processing system by reading the print code having the above configuration, the CPU 1
The program that controls 3 is explained below.

FIG. 2 shows an instruction determination routine executed by the CPU 13 at an appropriate interrupt timing. In this routine, first, a signal from the detector 20 is fetched (step S ₁ ). Then, by detecting the start-stop portion in the signal identifying the code signal (step S ₂₎ which is decoding (Step S _3). As described above, the code signal is a sequence of a plurality of digits (0 to 9). The number of digits of the entire code signal including the ID digit and the checksum digit is determined. Is determined according to a predetermined correspondence relationship such as the above-mentioned independent instruction code table (steps S ₄ and S ₅ ). In this case, a method of determining by the number of digits excluding the ID digit and the checksum digit can be considered. In this case, it is determined whether or not the instruction portion has two digits.

Next, if the number of digits is not 4 digits, it is determined whether it is 6 digits (step S ₆ ). If the total number of digits of the code signal is six, it is determined that the code is a chapter search command (step
S _7), should also determine the chapter number of the search destination (step S _8). Then, to determine the contents of incidental instruction by executing the incidental instruction determining routine to be described later (step S _9).

Also, to determine if 8-digit or if even in 6 digits in total number of digits of the code signal 4 digits (step S _10), it is determined that the chapter reproduction instruction if 8 digits (step
S _11), then advance to determine the chapter playback range (step S _12). Then, run the incidental instruction determining routine to be described later (step S _13).

If the total number of digits of the code signal does not correspond to 4, 6, or 8 digits, it is determined whether it is 10 (step
S ₁₄ ), if it is 10 digits, it is determined to be a frame search instruction (step S ₁₅ ), and the search destination frame number is determined (step S ₁₆ ). Then, to execute the associated instruction determining routine (step S _17).

The total number of digits is 4 digit code signal, six digits, 8 digits, when does not correspond to any of the 10 digits, to determine whether 14-digit (step S _18), if a 14-digit segment It determines that the reproduction command (step S _19), advance to determine the start frame number and end frame number of the segment to be reproduced (step S _20). Then, to execute the associated instruction determining routine (step S _21).

If the total number of digits does not correspond to any of 4, 6, 8, 10, and 14 digits, it is determined that an error has occurred.
Naturally, the number of digits to be discriminated changes depending on the structure of the code signal. Code signal interleaved 2
Although it has an even number of digits when it is composed of 5 of 5, it can be considered that it has an odd number of digits if another code system is used. However, when interleaved 2 of 5 has an even number, the first digit is the ID
It is convenient to set the digits and the last digit to be the checksum digit.

Next, an ID digit discrimination correction routine, which will be described later, is executed to change the content of the discriminated instruction (step ₂₂ ). The ID digit determination routine will be described later, but if it is known in advance that the ID digit is not used, the ID digit determination correction routine can be omitted.

After the instruction determination is completed, the CPU1
3 plays, pauses, searches, while monitoring the lock-in state of the servo system of the playing part in cooperation with the playing part control circuit 16.
An operation command such as still is supplied to the playing section control circuit 16, while an audio reproduction processing circuit 9 and a video reproduction processing circuit are provided.
Giving a control command to the 10 signal system et al, determined according to the reproduction mode in the accompanying instruction (step S _23). Specific examples of such a performance section and signal system control are already well known and will not be described in detail here.

Next, the accompanying instruction determination routine will be described with reference to FIG.

First, by extracting two digits higher (earlier) digits from the last digit of the code signal (step S _30), value of the digit is determined whether or not the zero (step S _31), if it is zero It is determined that it is a video off command (step S ₃₂ ). When the numerical value is not zero, it is judged whether or not it is 1 (step S ₃₃ ), and when it is 1, it is judged that it is a video-on command (step S ₃₄ ). Further, when neither 1 determines that there as soon as at 9 (Step S _35), it is determined that a holding instruction if 9 (Step S _36). If it is not 9, it is determined that an error has occurred.

Next, the order of magnitude higher than the final digit by extracting (previous) digit (step S _37), the number is determined there as soon as zero (step S _38), is an audio-off command if zero Is determined (step _S39 ). If non-zero,
Determine is Do soon as at 1 (step S _40), and determines that the output instruction of only the channel 1 or L if 1 (step S _41). If the numerical value is not 1, it is determined as soon as it is 2 (step _S42 ).
Alternatively, it is determined that the output command is only R (step
S _43), the number is determined there as soon as at 3 when neither 2 (step S _44), when a 3 determines that is the stereo output command (step S _45). If the numerical value does not correspond to any of 0 to 3, it is determined as soon as it is 9 (step _S46 ), and if it is 9, it is determined that the instruction is a hold (maintain current state) command (step _S47 ). If none of 0 to 3.9, it is determined that an error occurs in this case. However, if an instruction is assigned to a numerical value of 4 to 8, it is natural that the determination must be made on that numerical value. .

Incidentally, it is preferable that an accompanying instruction is arranged in the lower digit of the code signal, the performance part control instruction is discriminated first, and the accompanying instruction routine is executed thereafter, which is consistent with the temporal order of the operation of the entire system.

Next, the ID determination correction routine will be described with reference to FIG. In this routine, first, a predetermined ID digit (for example, a leading digit) is extracted from the code signal (step S).
₅₀ ). When the value of the extracted digit is 0, it is determined that there is no ID designation or that the instruction operator does not need to change the command, for example, that the target operator is a beginner, and the process is terminated. If the numerical value is not zero, it is determined as soon as it is 1 (step _S52 ).
If the target operator is an intermediate person, for example,
The chapter reproduction range that has already been determined is changed by a predetermined relational expression (step S ₅₃ ). As the predetermined relational expression,
For example, an expression is such that F ₁ + ΔF ₁ → F ₁ and F ₂ + ΔF → F ₂ when the _first chapter of the reproduction range is F ₁ and the last chapter is F ₂ . Further, it is conceivable to add or delete a reproduction range separately, add a segment reproduction command, or make various changes. If the numerical value is not 1, it is judged as soon as it is 2 (step S ₅₄ ), and if it is 2, it is judged that the target operator is an expert and the contents of the command already judged are changed for the expert. . As described above, various changes can be made.

As is apparent from the above, in the player control method according to the present invention, the control command is defined by the print code, the print code is read, the print code is determined, and the determination result is stored. The control method is based on the stored contents, and the total number of digits and the contents of each digit are sequentially detected in determining the print code, and the control command is determined according to the total number of digits and the contents of each digit. Therefore, it is preferable that the length of the print code can be shortened and the capacity of the buffer memory used in the reading process or the reading means can be saved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a player to which a player control method according to the present invention is applied, and FIGS. 2 to 4 are flowcharts showing a control method according to the present invention. Explanation of reference numerals of main parts 2 ... information recording disk 3 ... pickup

Front page continuation (72) Inventor Kuniaki 426-10 Hanazono, Tokorozawa-shi, Tokorozawa Plant Pioneer Co., Ltd. (72) Takao Yamada 4-2610 Hanazono, Tokorozawa-shi, Tokorozawa Plant (56) References Special Features Open Sho 60-205887 (JP, A) Actual Open Sho 62-142762 (JP, U)

Claims (1)

(57) [Claims] 1. A reading process for reading a print code composed of a plurality of digits having different numbers of digits corresponding to the contents of each of a plurality of operation commands, a determining process for determining a read code signal, and the determining process. In the control step of supplying an operation command to the information recording medium reproducing apparatus in accordance with the determination result in the step of determining the total number of digits of the code signal and the content of each digit. A control method characterized by detecting and detecting a corresponding operation command among the operation commands according to the number of digits and the content of each digit.