JP3085708U - FF / REW control device and video device - Google Patents

Abstract

(57) [Summary] (With correction) [Problem] If the hub diameter cannot be determined, FF / REW must be continued at a low speed to protect the video tape, and the time required for FF / REW becomes longer. There were challenges. SOLUTION: When executing high-speed FF / REW, a system controller 20 calculates an A value based on rotation periods Ts and Tt, and determines a hub diameter of the video tape based on the A value. When the hub diameter can be determined, the hub diameter is set to R
It is stored in AM21. Therefore, even when the hub diameter cannot be determined based on the A value, high-speed tape feeding can be performed at a tape speed corresponding to the hub diameter stored in the RAM 21. Therefore, it is not necessary to execute the high-speed tape feeding for the thick hub type with respect to the thin hub type video tape, and the time required for the high-speed FF / REW can be reduced.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an FF / REW control device and a video device, and more particularly, to an FF / REW control device and a video device capable of performing high-speed FF or high-speed REW.

[0002]

[Prior art]

 As a conventional FF / REW control device, an FF / REW control device employed in a tape device disclosed in Japanese Patent Application Laid-Open No. H11-110853 is known. In this FF / REW control device, in order to safely and reliably reduce the time required for FF / REW while taking into account the tape hub diameter, the tape running speed is reduced when the tape running speed is determined and the tape running speed is determined to be small. Is set to the high feed rate again.

[0003]

[Problems to be solved by the invention]

 In the conventional FF / REW control device described above, the hub diameter cannot be determined depending on the tape position. In this case, even if the hub is a thin hub, the FF / REW must be continued at the reduced tape running speed. However, there is a problem that the time required for FF / REW becomes longer. The present invention has been made in view of the above problems, and provides an FF / REW control device and a video device capable of shortening the time required for FF / REW even when the hub diameter cannot be determined. The purpose is to:

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 comprises a tape feeding means for loading a video tape and executing FF / REW so that the tape traveling speed can be changed, a supply reel and a take-up reel for the video tape. And a rotation cycle detecting means for detecting the rotation cycle of T as Ts and Tt, respectively, and an A value determined by an arithmetic expression of A = Ts ** 2 + Tt ** 2 (**; power) is calculated, and based on this A value, Hub diameter discriminating means for discriminating the hub diameter of the video tape; and tape feed control means for causing the tape feeding means to execute high-speed tape feeding corresponding to the hub diameter determined by the hub diameter discriminating means. In the FF / REW control device, the FF / REW control device includes hub diameter storage means for storing the hub diameter determined by the hub diameter determination means, When the hub diameter cannot be discriminated by the hub diameter discriminating means, the high-speed tape feeding corresponding to the hub diameter stored in the hub diameter storing means is executed by the tape feeding means. When the high-speed tape feed corresponding to the hub diameter stored in is executed, the rotation cycle detection means detects the rotation cycle of the supply reel and the take-up reel, and the hub diameter determination means The hub diameter of the video tape is determined based on the detected rotation cycle, the hub diameter storage means updates the hub diameter stored with the determined hub diameter, and the hub diameter storage means When the loaded state of the video tape is canceled, the stored hub diameter is erased.

In the invention according to claim 1 configured as described above, the rotation cycle detecting means detects the rotation cycles of the video tape supply reel and the take-up reel as Ts and Tt, respectively. Then, the hub diameter determining means calculates an A value determined by an arithmetic expression of A = Ts ** 2 + Tt ** 2 (**; power), and determines the hub diameter of the video tape based on the A value. The tape feed controller causes the tape feeder to execute a high-speed tape feed corresponding to the hub diameter determined by the hub diameter determiner. At this time, the hub diameter storage means stores the hub diameter determined by the hub diameter determination means. When the hub diameter discriminating means cannot determine the hub diameter based on the A value, the tape feeding control means performs high-speed tape feeding corresponding to the hub diameter stored in the hub diameter storage means. To run. Therefore, even when the hub diameter cannot be determined, FF / REW can be performed at a tape speed corresponding to the hub diameter of the video tape. Therefore, it is possible to efficiently reduce the time required for FF / REW while protecting the video tape.

Further, when high-speed tape feeding corresponding to the hub diameter stored in the hub diameter storage means is executed, the rotation cycle detection means detects a rotation cycle between the supply reel and the take-up reel. The hub diameter determining means determines the hub diameter of the video tape based on the detected rotation period, and the hub diameter storage means stores the hub diameter stored based on the determined hub diameter. Update. Therefore, if the newly determined hub diameter is the same as the hub diameter stored in the hub diameter storage means, high-speed tape feeding can be continued without changing the tape speed. Then, the subsequent tape speed can be controlled in accordance with the newly determined hub diameter. In this manner, the configuration is useful in that it is possible to reconfirm whether the hub diameter stored in the hub diameter storage means corresponds to the loaded video tape.

Since the hub diameter of the same video tape is stored in the hub diameter storage means from when the video tape is loaded to when the loaded state is released, FF / REW is executed. The hub diameter stored in the memory can be referred to each time it is received. However, when the video tape is replaced, it is necessary to newly determine the hub diameter, and if the hub diameter of the previously loaded video tape is still stored in the hub diameter storage means, the hub is newly loaded. There is a possibility that the tape speed will be higher than the tape speed corresponding to the hub diameter of the selected video tape, and the video tape cannot be sufficiently protected. Therefore, the hub diameter storage means erases the stored hub diameter when the loaded state of the video tape is canceled.

In the first aspect of the present invention, the FF / REW control device is realized by a specific configuration. However, when the hub diameter cannot be determined, the FF / REW control device uses the hub diameter stored in the hub diameter storage means to perform high-speed operation. From the viewpoint that the tape feed can be controlled, the FF / REW control device according to the present invention can be considered in a broader sense. As an example, the invention according to claim 2 includes a tape feeding unit that executes FF / REW so that a tape running speed can be changed by loading a video tape, and a supply reel and a take-up reel of the video tape. A rotation cycle detection means for detecting a rotation cycle; a hub diameter determination means for determining a hub diameter of the video tape based on each rotation cycle detected by the rotation cycle detection means; and a hub diameter determination means. The hub diameter storage means for storing the determined hub diameter, and the high-speed tape feed corresponding to the hub diameter stored in the hub diameter storage means when the hub diameter cannot be determined by the hub diameter determination means. And a tape feed control means to be executed by the control means.

In the invention according to claim 2 configured as described above, when the rotation cycle detecting means detects the rotation cycle of the video tape supply reel and the take-up reel, the hub diameter discrimination means sets the rotation of these hubs. The hub diameter of the video tape is determined based on the cycle. The tape feed controller causes the tape feeder to execute a high-speed tape feed corresponding to the hub diameter determined by the hub diameter determiner. At this time, the hub diameter storage means stores the hub diameter determined by the hub diameter determination means. If the hub diameter cannot be determined by the hub diameter determining means, the tape feeding control means causes the tape feeding means to execute high-speed tape feeding corresponding to the hub diameter stored in the hub diameter storing means. . Therefore, even when the hub diameter cannot be determined, FF / REW can be performed at a tape speed corresponding to the hub diameter of the video tape. Therefore, the time required for FF / REW can be efficiently reduced while protecting the video tape.

[0010] As an example of a method of determining the hub diameter by the hub diameter determining means, the invention according to claim 3 is based on the FF / REW control device according to claim 2. Calculates the A value determined by the arithmetic expression of A = Ts ** 2 + Tt ** 2 (**; power), where Ts and Tt are the rotation periods of the supply reel and the take-up reel, respectively. Then, the hub diameter of the video tape is determined. In the invention according to claim 3 configured as described above, the hub diameter discriminating means, when the rotation cycle of the supply reel and the take-up reel detected by the rotation cycle detection means is input, receives each rotation cycle. Are defined as Ts and Tt, respectively, an A value determined by an arithmetic expression of A = Ts ** 2 + Tt ** 2 (**; power) is calculated, and the hub diameter of the video tape is determined based on the A value. As described above, if the calculation for judging the hub diameter by the hub diameter judging means is simplified, the calculation load on the FF / REW control device can be reduced.

Further, an additional configuration may be provided to confirm whether or not the hub diameter stored in the hub diameter storage means corresponds to the loaded video tape. As an example, the invention according to claim 4 is a FF / REW control device according to claim 2 or 3, wherein the high-speed tape corresponding to the hub diameter stored in the hub diameter storage means. When feeding is performed, the rotation cycle detecting means detects a rotation cycle of the supply reel and the take-up reel, and the hub diameter determining means determines a hub of the video tape based on the detected rotation cycle. The hub diameter storage means is configured to determine the diameter and update the hub diameter stored with the determined hub diameter. 5. The invention according to claim 4, wherein when the high-speed tape feeding corresponding to the hub diameter stored in the hub diameter storage means is executed, the rotation cycle detection means connects the winding reel with the supply reel. The rotation cycle with the take-up reel is detected, the hub diameter determination means determines the hub diameter of the video tape based on the detected rotation cycle, and the hub diameter storage means stores the determined hub diameter. Update the hub diameter stored in.

Accordingly, when the newly determined hub diameter is the same as the hub diameter stored in the hub diameter storage means, high-speed tape feeding can be continued without changing the tape speed. If is different, the subsequent tape speed can be controlled in accordance with the newly determined hub diameter. As described above, when it is possible to reconfirm whether the hub diameter stored in the hub diameter storage means corresponds to the loaded video tape, the hub is protected while the video tape is protected. High-speed tape feeding is surely performed at the tape speed corresponding to the diameter. Therefore, the time required for FF / REW can be efficiently reduced.

Further, an additional configuration may be provided to reliably prevent the tape from being fed at a speed higher than the tape speed corresponding to the hub diameter of the loaded video tape. For example, in the invention according to claim 5, in the FF / REW control device according to any one of claims 2 to 4, the hub diameter storage means cancels the loaded state of the video tape. Sometimes, the stored hub diameter is deleted. In the device according to claim 5 configured as described above, the hub diameter stored in the video tape is erased when the loaded state of the video tape is canceled, so that when another video tape is loaded. Means that the newly determined hub diameter is stored. For this reason, the tape speed does not become higher than the tape speed corresponding to the hub diameter of the newly loaded video tape, and the video tape can be reliably protected.

By the way, the above-mentioned FF / REW control can be applied to a specific device. As an example, the invention according to claim 6 is based on a supply reel and a take-up reel in a loaded video tape. The video tape has a rotation cycle sensor for detecting a rotation cycle with a reel, has a video mechanism for executing FF / REW so that the tape running speed of the video tape can be changed, and a RAM capable of storing predetermined data; With each rotation cycle detected by the cycle sensor as Ts and Tt, an A value determined by an arithmetic expression of A = Ts ** 2 + Tt ** 2 (**; power) is calculated, and based on the A value, The hub diameter of the video tape is determined and stored in the RAM. When the hub diameter cannot be determined, the high-speed tape feed corresponding to the hub diameter stored in the RAM is performed by the video machine. And a microcomputer for executing the program.

In the invention according to claim 6 configured as described above, when the rotation mechanism detects the rotation cycle of the supply reel and the take-up reel in the loaded video tape by the video mechanism, the microcomputer determines The rotation period detected by the rotation period sensor is defined as Ts and Tt, respectively, and an A value determined by an arithmetic expression of A = Ts ** 2 + Tt ** 2 (**; power) is calculated, and based on the A value, To determine the hub diameter of the video tape. The microcomputer stores the determined hub diameter in the RAM, and if the hub diameter cannot be determined when executing FF / REW, the microcomputer sends the high-speed tape feed corresponding to the hub diameter stored in the RAM to the video. Let the mechanism execute. Therefore, even if the hub diameter cannot be determined, it is possible to perform appropriate high-speed tape feeding at a tape speed corresponding to the hub diameter of the video tape.

[0016]

[Effect of the invention]

 As described above, the present invention can realize a FF / REW control device capable of shortening the time required for FF / REW even when the hub diameter cannot be determined by a specific configuration. . Further, according to the invention of claim 2, it is possible to provide an FF / REW control device capable of shortening the time required for FF / REW even when the hub diameter cannot be determined. Further, according to the invention of claim 3, it is possible to reduce the calculation load in determining the hub diameter.

Further, according to the invention of claim 4, it is possible to execute high-speed tape feeding at an appropriate tape speed corresponding to the loaded video tape. Furthermore, according to the invention of claim 5, the video tape can be reliably protected. Further, according to the invention of claim 6, it is possible to provide a video device capable of shortening the time required for FF / REW even when the hub diameter cannot be determined.

[0018]

[Embodiment of the invention]

 Here, embodiments of the present invention will be described in the following order. (1) About schematic structure of VCR: (2) About high-speed FF / REW: (3) Summary:

(1) Schematic Configuration of VCR: FIG. 1 is a schematic block diagram showing a VHS type VCR to which an FF / REW control device according to an embodiment of the present invention is applied. In FIG. 1, a signal processing circuit 10 includes a tuner, a VIF, an RF converter, and the like, and generates a signal for video recording by controlling these in an appropriate order. The video signal to be reproduced is output to a television or the like (not shown). The video mechanism 30 according to the present invention controls the running of the video tape, and records a video signal on the video tape or reads a video signal from the video tape during video recording / reproduction.

The head system circuit 31 provided in the video mechanism 30 includes a drum head, an AC head, and the like. At the time of video recording, a video recording signal generated by the signal processing circuit 10 is sent to the head system circuit 31 and recorded on a video tape. On the other hand, at the time of video reproduction, a video signal is generated from information recorded on a video tape and output to the signal processing circuit 10. In addition, the video mechanism 30 detects a rotation cycle of the take-up reel 35 and the supply reel 36 for controlling the tape running during the execution of FF / REW, and a capstan motor 34 for rotating the reel of the video tape. , And end sensors 33a and 33b for detecting the end and start of the video tape. In addition, a capstan motor and a servo circuit (not shown) are provided to control the tape running during video recording / reproduction. These are configured to control the running of the video tape.

In the present embodiment, it is preferable to execute high-speed FF / REW for a video tape of a thick hub (hub diameter of 62 mm) and a video tape of a thin hub (hub diameter of 26 mm). I have. Of course, it is possible to execute high-speed FF / REW even for nonstandard video tapes. The system controller 20, which is a microcomputer according to the present invention, includes a CPU, a ROM, a RAM, and the like (not shown). A predetermined program is stored in the ROM, and the CPU controls the signal processing circuit 10 and the internal devices of the video mechanism 30 while reading the program from the ROM. That is, at the time of video recording, a video tape is sent at a predetermined speed under the control of the system 20, and a signal of a desired channel output from the signal processing circuit 10 is recorded on the video tape by the head system circuit 31. At the time of reproduction, a video signal recorded on a video tape is detected by a head system circuit 31, and after being subjected to predetermined processing by a signal processing circuit 10, is transmitted to a television. As a result, the user can view the reproduced video.

The system controller 20 performs FF / REW control while changing the speed by controlling the capstan motor 34 and the like in the video mechanism 30. That is, the system controller 20 can control the rotation speed and the rotation direction of the capstan motor 34. As shown in the plan view of FIG. 2, when executing FF, the capstan motor 34 is driven to rotate the clutch pulley 34a in the direction of the arrow (clockwise in FIG. 2). Then, the FF / REW idler 34b abutting on the peripheral edge of the clutch pulley 34a moves to the take-up reel base 35a side, presses against the rotating shaft thereof, and rotates in the direction of the arrow (counterclockwise in FIG. 2) to rotate the same. The shaft is rotated in the direction of the arrow (clockwise in FIG. 2) to feed the tape.

On the other hand, as shown in the plan view of FIG. 3, when executing the REW, the capstan motor 34 is driven in the reverse direction to rotate the clutch pulley 34 a in the direction of the arrow (in FIG. 3, counterclockwise). Then, the FF / REW idler 34b moves in a pendulum toward the supply reel table 36a and presses against the rotating shaft thereof, and rotates in the direction of the arrow (clockwise in FIG. 3). In this case, the tape is fed counterclockwise. The video deck according to the present embodiment can perform so-called high-speed FF and high-speed REW. These high-speed FFs and high-speed REWs have different tape running speeds than ordinary FFs and REWs, respectively, but their basic operations are the same as those described above. Next, the control of the tape running speed during the execution of the high-speed FF / REW will be described in detail.

As shown in FIG. 4, the take-up reel base 35a and the supply reel base 36a are provided with substantially fan-shaped reflectors 35c, 36c on the bottom side of the rotating shafts 35b, 36b at equal intervals in the circumferential direction. It is arranged. Below the respective reflection plates 35c and 36c, rotation period sensors 32a and 32b including phototransistors 32a1 and 32b1 and light emitting diodes 32a2 and 32b2 are arranged. The light emitting surfaces of the light emitting diodes 32a2 and 32b2 are directed toward the reflection plates 35c and 36c, and the phototransistors 32a1 and 32b1 detect the reflected light from the reflection plates 35c and 36c. As a result, four pulses are output from the phototransistors 32a1 and 32b1 each time the rotation shafts 35b and 36b make one rotation.

The output pulses of the phototransistors 32a1 and 32b1 are input to the system controller 20, as shown in FIG. Then, the system controller 20 detects the rotation cycle of the take-up reel table 35a and the supply reel table 36a, and calculates the sum of squares A of the rotation cycle and the rotation cycle ratio N 2. Here, the square sum A value of the rotation cycle is defined by the formula A = Ts ** 2 + Tt ** 2 (**; exponentiation), where Ts is the rotation cycle of the supply reel 36, and Tt is the rotation cycle of the take-up reel 35. Is done. Note that the rotation periods Ts and Tt are obtained by dividing the pulse period of the pulse signals output from the phototransistors 32a1 and 32b1 by “4”.

(2) High-speed FF / REW: The video mechanism 30 is provided with end sensors 33 a and 33 b for detecting the end of the tape, and outputs of these sensors are also input to the system controller 20. When the high-speed FF or the high-speed REW is instructed, the system controller 20 detects this instruction and executes the high-speed FF or the high-speed REW process according to the flowchart of FIG. In the figure, first, a queue review operation is executed to calculate the A value (step S100). Then, the process branches based on the calculated A value (step S110). This A value is a positive value that depends on the diameter of the hub of the reel of the video tape, and it has been found in advance that the classification is performed according to the correspondence shown in FIG. That is, if 1.8 <A ≦ 2.2, it is a video tape of a thin hub type and a tape length of 90 minutes, and if 3.5 <A, it is a video tape of a thick hub c type (steps S120 and S130). .

Note that the range of the A value includes the upper limit and does not include the lower limit, but this is for convenience only. Therefore, the A value for discriminating a video tape of a narrow hub type with a tape length of 90 minutes may be set as 1.8 ≦ A <2.2 or 1.8 ≦ A ≦ 2.2. May be set as follows. Here, the reason why the hub diameter of the reel is determined is that the tape speed at the time of high-speed FF / REW can be changed depending on the hub diameter. In other words, the narrow hub type can wind a longer length of video tape than the thick hub type, so when high-speed FF / REW is performed between tape ends, high-speed tape feeding starts before reaching the tape end. Since there is enough time before the tape can be fed, the tape can be fed at a relatively high speed. On the other hand, in the case of the thick hub type, since the time from the start of high-speed tape feeding to the end of the tape is short, the tape must be fed at a relatively low speed to protect the video tape. Absent.

However, depending on the position of the tape, the range of the A value for the narrow hub type and the range of the A value for the thick hub type overlap, and the hub diameter of the reel cannot be determined using the A value. is there. For this reason, when the system controller 20 can determine the hub diameter of the reel, the system controller 20 stores the determined hub diameter in its own RAM 21 and uses the A value to store the hub diameter of the reel. When the diameter cannot be determined, high-speed tape feeding at a tape speed corresponding to the stored hub diameter can be performed.

FIG. 8 is a flowchart showing the tape speed control in the system controller 20. In the figure, when the system controller 20 cannot determine whether the hub type is the thin hub type or the thick hub type based on the A value, the result of the previous hub diameter determination is stored in the RAM 21. It is confirmed whether or not there is (Steps S200, S210). If the discrimination result is stored in the RAM 21, the system controller 20 instructs the video mechanism 30 to execute the high-speed tape feeding of the video tape based on the tape feeding speed corresponding to the hub diameter based on the stored discrimination result. To output a control signal. For this reason, when the hub diameter stored in the RAM 21 is a thin hub, the target speed is set to a relatively high value, high-speed tape feeding is executed, and when the hub diameter stored in the RAM 21 is a thick hub, In step (2), the target speed is set relatively low and high-speed tape feeding is executed (steps S220 to S240).

If the determination result is not stored in the RAM 21 in step S 210, the target speed is set to a relatively low speed and the high-speed tape feeding is performed in order to protect the video tape in case of a thick hub. Is executed. Further, when high-speed FF / REW is performed at a tape speed based on the hub diameter stored in the RAM 21, it is possible to reconfirm the hub diameter discrimination result. For example, after starting high-speed tape feeding based on the determination result of a thick hub stored in the RAM 21, when the tape reaches a tape position where the hub diameter can be determined, the determination result indicating that the hub is a thick hub again. If this is obtained, it is possible to confirm that the tape is a thick hub type video tape, and it is possible to continue tape feeding without changing the speed.

On the other hand, if the result of the determination that the hub is a thin hub is obtained, the hub diameter stored in the RAM 21 is updated to the thin hub, and a control signal for executing high-speed FF / REW at a relatively high tape speed. Is output to the video mechanism 30. Then, when the hub type is determined to be a thick hub type despite the thin hub type, the time required for the high-speed FF / REW can be reduced. Here, the hub diameter stored in the RAM 21 is the same as the hub diameter of the reel on the video tape loaded in the video device. Therefore, the hub diameter is the same from the loading of the video tape to the unloading. As long as the video tape is continuously loaded, the determined hub diameter can be used at the time of high-speed FF / REW.

Therefore, the system controller 20 clears the hub diameter stored in the RAM 21 when outputting a control signal for unloading to the video mechanism 30, and next time a video tape having a different hub diameter is loaded. Be prepared. For this reason, even if the loaded video tape changes from a thin hub type to a thick hub type, there is no possibility that a relatively high-speed tape feed for the thin hub type is erroneously executed. It is possible to protect the tape.

(4) Conclusion As described above, the system controller 20 calculates the A value based on the rotation periods Ts and Tt detected by the phototransistors 32a1 and 32b1 when executing the high-speed FF / REW. . The hub diameter of the video tape is determined based on the A value. When the hub diameter can be determined, the hub diameter is stored in the RAM 21. Therefore, even when the hub diameter cannot be determined based on the A value, high-speed tape feeding can be executed at a tape speed corresponding to the hub diameter stored in the RAM 21. Therefore, it is not necessary to execute the high-speed tape feeding for the thick hub type on the thin hub type video tape, and the time required for the high-speed FF / REW can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing a VHS type video deck to which an FF / REW control device according to an embodiment of the present invention is applied.

FIG. 2 is a plan view for explaining an operation when executing the FF.

FIG. 3 is a plan view for explaining an operation at the time of executing REW.

FIG. 4 is a bottom perspective view of a take-up reel base and a supply reel base.

FIG. 5 is a schematic block diagram showing that outputs of various sensors are input to a system controller.

FIG. 6 is a flowchart illustrating an outline of a process performed by a system controller when executing a high-speed FF / REW.

FIG. 7 is a table showing a correspondence between an A value and a type of video tape.

FIG. 8 is a flowchart illustrating a procedure of tape speed control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Signal processing circuit 20 ... Syscon 30 ... Video mechanism 31 ... Head system circuit 32a, 32b ... Rotation cycle sensor 32a1, 32b1 ... Phototransistor 32a2, 32b2 ... Light emitting diode 33a, 33b ... End sensor 34 ... Capstan motor 35 ... Winding Take-up reel 35a ... Take-up reel base 36 ... Supply reel 36a ... Supply reel base 35b, 36b ... Rotating shaft 35c, 36c ... Reflector

Claims (6)

[Utility model registration claims] 1. A tape feeding means for executing FF / REW so that a tape running speed can be changed by loading a video tape, and detecting a rotation cycle of a supply reel and a take-up reel of the video tape as Ts and Tt, respectively. A rotation cycle detecting means, and an A value determined by an arithmetic expression of A = Ts ** 2 + Tt ** 2 (**; power), and a hub diameter for determining the hub diameter of the video tape based on the A value An FF / REW control device comprising: a discrimination means; and a tape feed control means for causing the tape feed means to execute a high-speed tape feed corresponding to the hub diameter determined by the hub diameter discrimination means. The apparatus includes hub diameter storage means for storing the hub diameter determined by the hub diameter determination means, and the tape feed control means determines the hub diameter by the hub diameter determination means. If it cannot be determined, the high-speed tape feed corresponding to the hub diameter stored in the hub diameter storage means is executed by the tape feed means, and the high-speed tape feed corresponding to the hub diameter stored in the hub diameter storage means is executed. The rotation cycle detection means detects the rotation cycle of the supply reel and the take-up reel, and the hub diameter determination means determines the hub diameter of the video tape based on the detected rotation cycle. The hub diameter storage means updates the stored hub diameter with the determined hub diameter. The hub diameter storage means stores the stored hub diameter when the loaded state of the video tape is canceled. FF / REW control device, characterized in that: 2. A tape feeding means for loading a video tape and executing FF / REW so as to change a tape running speed, and a rotation cycle detection means for detecting a rotation cycle of a supply reel and a take-up reel of the video tape. Hub diameter discriminating means for discriminating the hub diameter of the video tape based on each rotation cycle detected by the rotation cycle detecting means; hub diameter storing the hub diameter discriminated by the hub diameter discriminating means Storage means; and tape feed control means for causing the tape feed means to execute high-speed tape feed corresponding to the hub diameter stored in the hub diameter storage means when the hub diameter cannot be determined by the hub diameter determination means. FF / REW control device characterized by performing. 3. The hub diameter discriminating means sets the rotation cycles of the supply reel and the take-up reel to Ts and Ts, respectively.
The method is characterized in that an A value determined by an arithmetic expression of A = Ts ** 2 + Tt ** 2 (**; power) is calculated as t, and the hub diameter of the video tape is determined based on the A value. The FF / REW control device according to claim 2. 4. When high-speed tape feeding corresponding to the hub diameter stored in the hub diameter storage means is executed, the rotation cycle detection means detects a rotation cycle between the supply reel and the take-up reel, The hub diameter determining means determines the hub diameter of the video tape based on the detected rotation period, and the hub diameter storage means updates the hub diameter stored with the determined hub diameter. The FF / REW according to claim 2 or 3, characterized in that:
Control device. 5. The hub diameter storage means according to claim 2, wherein the hub diameter storage means erases the stored hub diameter when the loaded state of the video tape is canceled. The FF / REW control device according to the above. 6. A video mechanism having a rotation cycle sensor for detecting a rotation cycle of a supply reel and a take-up reel in a loaded video tape, and executing FF / REW so as to change a tape running speed of the video tape. A = Ts ** 2 + Tt ** 2 (**; exponentiation) where Ts and Tt are the rotation cycles detected by the rotation cycle sensor, respectively, and a RAM capable of storing predetermined data. The A value determined by the equation is calculated, the hub diameter of the video tape is determined based on the A value, and stored in the RAM. When the hub diameter cannot be determined, the hub diameter stored in the RAM is used. A video apparatus comprising: a microcomputer for causing the video mechanism to execute a corresponding high-speed tape feed.