JP2004165858A - Continuous image recording and reproducing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuous image recording and reproducing system capable of recording/reproducing consecutive data over a plurality of recording media. <P>SOLUTION: When detecting an end of a tape while recording the data on the tape with a first cassette DV video deck 3, a control unit 7 consecutively records the data to a hard disk video deck 11. When detecting the end of a tape when reproducing data on the tape with the first DV video deck 3, the control unit 17 consecutively reproduces the data stored on the hard disk video deck 11 synchronously with a reproduction signal on the tape. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a continuous recording / reproducing system for continuously recording and reproducing continuous video / audio by a plurality of devices.
[0002]
[Prior art]
2. Description of the Related Art In recent years, with the development of digital technology, there are various video recording and playback devices. For example, there are various types such as a cassette tape type digital VCR using a video cassette tape, a hard disk VCR using a hard disk, and a DVD deck using an optical recording medium.
[0003]
These digital recording and playback devices can be connected to each other, and can record and edit digital data. In particular, the hard disk VCR is used for editing work called non-linear editing because the recorded video can be accessed randomly, and the video edited with this hard disk VCR is further written to a digital VCR ( Recording), and can be played back on those devices (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2001-318463 A
[0005]
[Problems to be solved by the invention]
However, although these recording and playback devices can be connected to each other and exchange recorded data with each other, one device cannot record and play back continuous video and audio on a plurality of recording media.
[0006]
For example, in the case of a cassette tape type VCR, recording can only be performed for a time that depends on the capacity of the video cassette tape and the recording mode. Continuous recording with a cassette tape is not possible. This is because even if a digital VCR is equipped with a cassette changer that automatically changes video cassette tapes, data cannot be recorded and reproduced during the replacement of video cassette tapes. It is not something that can be recorded.
[0007]
The same applies to the case of a hard disk video deck, in which continuous data (video and / or audio) cannot be recorded beyond the capacity of the hard disk.
[0008]
The present invention has been made in view of the above, and an object of the present invention is to provide a continuous recording and reproducing system capable of recording and reproducing continuous data on a plurality of recording media.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided an exchangeable recording / reproducing apparatus in which a recording medium capable of storing moving image and audio data contents is exchangeably built, and the moving image and audio data can be stored. A fixed recording / reproducing device, a device for taking in content, a communication bus controlled by a serial interface capable of bidirectionally transmitting a plurality of contents and control commands to these devices, and the exchangeable bus via the communication bus. This is a continuous recording / reproducing system having a control device for storing the video and audio data in a recording / reproducing apparatus or a fixed recording / reproducing apparatus.
[0010]
The control device monitors a state of the replaceable recording / reproducing device, sets the recording medium, and recognizes the replaceable recording / reproducing device storing the content; and When the recording capacity of the recording medium set to is equal to or less than a predetermined capacity, instead of the replaceable recording / reproducing device, means for recording the content in the fixed recording / reproducing device,
Means for storing a recording position and a recording time zone in the fixed recording / reproducing apparatus as data at the time of exchanging a storage medium in accordance with the recording of the content to the fixed recording / reproducing apparatus; When the playback position information of the storage medium of the playback device matches the data at the time of replacing the storage medium, the video and audio data corresponding to the data at the time of replacement of the storage medium of the fixed recording / reproducing device are recognized. Means for outputting to the interchangeable recording / reproducing apparatus via the communication bus.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 is a block diagram showing a configuration of a continuous recording and playback system to which the present invention is applied.
[0013]
This continuous recording / reproducing system 1 includes a first digital video deck 3 (DV deck shown), a second digital video deck 5, and a third digital video deck 7, which are used by exchanging cassette video tapes, and a digital video with a built-in cassette changer. It comprises a deck 9, a hard disk video deck 11, a television tuner unit 13, an AV monitor 15, and a control device 17 for controlling recording and playback in each video deck, and these are connected as a network by an IEEE 1394 bus. The IEEE 1394 is a high-speed serial interface having a transmission speed of 100M, 200M, 400Mbps or the like, and can simultaneously transmit a plurality of compressed moving images such as MPEG (data can be exchanged between a plurality of devices). It can also be used to transmit uncompressed digital video.
[0014]
In the following description, the first to third digital video decks 3, 5, 7, the cassette changer built-in digital video deck 9, the hard disk video deck 11, and the like may be collectively referred to simply as a video deck.
[0015]
The first to third digital video decks 3, 5, and 7 are interchangeable recording / reproducing devices, each of which can set only one video cassette tape 19, and the recordable capacity of the set video cassette tape 19. If the recording is performed beyond the limit, the video cassette tape 19 needs to be replaced.
[0016]
Further, a television monitor 21 is further connected to the first and second digital video decks 3 and 5 so that images from the connected video deck can be viewed. Video and audio from the TV tuner unit 13 and other video decks connected to the IEEE 1394 bus can be viewed.
[0017]
The third digital video deck 7 is a digital video deck for a small video cassette tape cassette used in the movie video camera 23.
[0018]
The digital video deck 9 with a built-in cassette changer is a kind of a replaceable recording / reproducing apparatus, and a plurality of video cassette tapes 19 are previously mounted on the cassette changer. For example, when recording beyond the recordable capacity of one video cassette tape, or when reproducing data recorded over a plurality of video cassette tapes, the video cassette tape automatically provided Is exchanged for a recorded or reproduced video cassette tape. However, recording and playback cannot be performed during the replacement work.
[0019]
The hard disk VCR 11 is a fixed recording medium recording / reproducing apparatus, and has a hard disk as a recording medium. Data recorded on the hard disk can be randomly accessed, and video editing such as non-linear editing can be performed. One of the advantages of the hard disk VCR 11 is that the hard disk VCR itself manages the free space of the hard disk, and in recording, recording can be performed in an open portion until the storage capacity of the built-in hard disk is full. That is.
[0020]
The TV tuner unit 13 includes a TV tuner 27 that receives a TV signal from the antenna 25 and an analog-digital converter 29 that converts the received TV signal into a digital video / audio signal.
[0021]
The AV monitor 15 can watch the video from each video deck connected to the IEEE 1394 bus.
[0022]
The control device 17 centrally controls the operation of all VCRs, and inputs and outputs video signals to and from each VCR, as well as individual operation commands (playback, recording, stop, fixed-speed fast-forward, fixed-speed rewind, Control of various operations such as pause).
[0023]
The first VCR 3 and the TV monitor 21 are in the room of Mr. A, the second VCR 5 and the TV monitor 21 are in the room of Mr. B, and the cassette changer 19 and the AV monitor 15 are in the main room. Suppose you are.
[0024]
FIG. 2 is a block diagram showing a configuration inside the control device.
[0025]
Inside the control device 17, two buffer memories (first memory 31 and second memory 33) for temporarily storing video data, reading and writing of data from and to two memories, and switching of output data are controlled. A memory and data switch controller 35, a data output switch 37 for switching data to be output according to an instruction of the memory and data switch controller 35, an operation command controller 39 for issuing an operation command to each VCR, A continuous state memory 41 is provided for storing whether the data is recorded in such an order.
[0026]
Here, the first memory 31 is used to temporarily store data from the digital video decks (first to third digital video decks), and the second memory 33 temporarily stores data from the hard disk video deck 11. Has been used for. Note that the first and second memories 31 and 33 are appropriately allocated to the two video decks used, and are not necessarily fixed to the allocations as illustrated. Therefore, this allocation is, for example, to allocate the data from the device that has started recording earlier to the first memory 31 and the device that has started recording later to the second memory 33.
[0027]
The memory and data switch controller 35 manages reading and writing of data in the two memories, and instructs the data output switch 37 from which of these two memories the signal is output.
[0028]
The continuous state memory 41 is a continuous state storage unit, and is a memory for storing which data is sequentially recorded from which recording medium to which recording medium. The continuous state memory 41 also stores a recording position on the hard disk VCR 11. Further, the continuous state memory 41 stores which device started recording first and which device started reproduction first.
[0029]
In the control device 17, the distribution of the recording stream to each medium of data and the status of each VCR (tape end point detection, cassette recording preparation, etc.) are performed to the cassette type VCR and the hard disk VCR 11. Control of recording execution / stop.
[0030]
The situation detection is performed using an IEEE 1394 AV protocol command.
[0031]
As a method of detecting that the control unit 17 has reached the tape end point in the cassette type video deck, a method of reading the time code data from the DIF stream by the control unit 17 and judging from the value, a method of IEEE 1394 AV protocol command The playback execution command is transmitted to the cassette type VCR side, and when "Reject" is returned, it is determined that the tape end point has been reached. Similarly, a vendor option command in the AV protocol command is set, and the cassette type VCR is set. And a method of instructing the controller of the video deck 3 to reach the tape end point.
[0032]
The DIF stream is a digital video standard that defines a digital signal transmission system, and a transmission signal conforming to the standard is called a DIF stream. This DIF stream contains, for example, information such as time code data, recording date and time, and recording time as subcode information, in addition to the video / audio / data signal. This subcode information can be read even in a fast-forward or rewind state.
[0033]
In the IEEE 1394 bus, control signals for controlling each video deck are exchanged between devices in addition to video signals based on the IEEE 1394 standard. In the IEEE 1394 standard, a unique device number called a node ID is assigned to each connected device. Therefore, each of the first to third digital video decks 3, 5, and 7, the digital video deck 9 with a built-in cassette changer, the hard disk video deck 11, the TV tuner unit 13, the AV monitor 15, and the control device 17 are all unique. Node ID is assigned.
[0034]
Such a continuous recording / playback system 1 may be one in which video decks and the like are dispersedly arranged in one house and networked by an IEEE1394 bus. For example, the first digital VCR 3 and the television monitor 21 connected thereto are a study, the second digital VCR 5 and the television monitor 21 connected thereto are a children's room, the third digital VCR 7, a digital device with a cassette changer. The VCR 9, the hard disk VCR 11, the TV tuner unit 13, the AV monitor 15, and the control device 17 are preferably arranged in a living room and connected to each other by an IEEE 1394 bus.
[0035]
Next, the operation of the continuous recording / playback system will be described.
[0036]
(Recording)
First, the recording operation of the continuous recording and playback system 1 will be described.
[0037]
FIG. 3 is a diagram for explaining an outline of a recording operation in the continuous recording and reproducing system.
[0038]
Here, a case will be described in which during recording on the digital video deck 9 with a built-in cassette changer, the recording capacity of the set video tape becomes insufficient for recording.
[0039]
Therefore, the input data stream to be recorded is larger than the recording capacity of one video cassette tape 19, as shown in FIG. Here, the recording capacity of the video cassette tape 19 is one hour (60 min) depending on the recording mode.
[0040]
First, in order to record the data (program) of the input data stream, an arbitrary video cassette tape 19 (cassette A in the figure) is selected and set on the digital video deck 9 with a built-in cassette changer. Then, a recording mode is selected and recording is started.
[0041]
In the digital video deck 9 with a built-in cassette changer, the position just before the tape completely runs out can be determined as the tape end point from the reel rotation speed of the cassette, etc., so that the recording time available for the cassette A is near the end, and this tape Data is recorded on the cassette A until the end point is detected.
[0042]
When the tape end point is detected in the digital video deck 9 with a built-in cassette changer, the control device 17 detects it and starts recording data (HDD (1)) on the hard disk video deck 11 (d1). At this time, the controller 17 stores in the continuous state memory 41 that continuous data has been recorded from the cassette A to the hard disk VCR 11 and that the data has been recorded in the HDD (1) area.
[0043]
When the recording of data in the hard disk video deck 11 is started, the recording of the cassette A ends, and the recording preparation for the next cassette (the cassette B in the figure) is performed.
[0044]
Preparation for recording on the cassette B is performed by exchanging the video cassette tape 19 from the cassette A to the cassette B in the digital video deck 9 with a built-in cassette changer. Then, when the preparation for recording on the cassette B is completed, the digital video deck 9 with a built-in cassette changer starts recording on the cassette B.
[0045]
When the recording to the cassette B is started, the controller 17 detects the start and stops the recording of the data (HDD (1)) on the hard disk VCR 11. At this time, the control device 17 stores in the continuous state memory 41 that continuous data has been recorded in the cassette B from the HDD (1) area of the hard disk video deck 11.
[0046]
Thereafter, the recording on the cassette B is continued until the tape end point of the cassette B is detected.
[0047]
When the tape end point is detected in the digital video deck 9 with a built-in cassette changer, the control device 17 detects it and starts recording data (HDD (2)) on the hard disk video deck 11. At this time, the controller 17 stores in the continuous state memory 41 that continuous data has been recorded from the cassette B to the HDD (2) area of the hard disk VCR 11. In the data recorded on the hard disk VCR 11, the recording of the data by the hard disk VCR 11 is distinguished as HDD (1), and the subsequent recording is classified as HDD (2).
[0048]
When the recording on the hard disk VCR 11 is started, the recording on the cassette B is completed, and the recording on the next cassette C is prepared. Preparation for recording on the cassette C is performed by exchanging the video cassette tape 19.
[0049]
When the preparation for recording on the cassette C is completed, recording on the cassette C is started in the digital video deck 9 with a built-in cassette changer.
[0050]
When the control device 17 detects that the recording on the cassette C has started, the recording on the hard disk VCR 11 (HDD (2)) is stopped. At this time, the control device 17 stores the fact that continuous data has been recorded from the HDD (2) area of the hard disk video deck 11 to the cassette C.
[0051]
In this way, one long input data stream is recorded by the three cassettes and the hard disk VCR 11 as shown in FIG. At this time, as shown in FIG. 3 (c), the time for the cassette A is slightly shorter than 60 mm when the tape completely disappears, the time for the cassette B is less than 60 mm when the tape completely disappears, and the time for the cassette C is halfway. To the end of the input data stream, and are recorded on the hard disk VCR 11 in two different data areas.
[0052]
Then, such continuous recording was recorded from the cassette A to the HDD (1) area, recorded from the HDD (1) area to the cassette B, and recorded from the cassette B to the HDD (2) area. That is, the fact that the data is recorded on the cassette C from the HDD (2) area is stored in the continuous state memory 41 of the control device 17.
[0053]
FIG. 4 is a diagram showing a sequence when recording is transferred from the digital video deck 9 with a built-in cassette changer to the hard disk video deck 11.
[0054]
When the tape end point is detected in the digital video deck 9 with a built-in cassette changer, the signal is output to the control device 17. The control device 17 starts recording data on the hard disk VCR 11 based on the signal of the tape end point detection. After the detection of the tape endpoint, recording is continued until the tape cannot be completely recorded. Therefore, during this time, the same data is recorded in the cassette A and the hard disk video deck 11 in an overlapping manner (the overlapping portion shown in the figure).
[0055]
Here, in the recording on the cassette A, the controller of the VCR records the time code data on the tape as the tape runs, and also outputs the time code data to the IEEE 1394 bus. The output of the time code data is not performed.
[0056]
Therefore, the controller 17 collects the time code output from the detection of the tape end point to the actual stop of the tape from the IEEE 1394 bus, and from the time when the recording by the hard disk VCR 11 is started, The recording time is counted on the hard disk VCR 11 along the same time code as the time code. Therefore, the cassette A time code is recorded such that the count of the recording time in the HDD (1) area coincides in the overlapping portion. This overlapping time code is used for adjusting the reproduction phase at the time of reproduction.
[0057]
Then, when the video cassette tape 19 is replaced, recording on the replaced cassette B is started, and the recording start signal is transmitted to the control device 17.
[0058]
At this time, in the cassette B, the time code data is recorded on the tape by the controller (not shown) of the video deck as the tape runs. If the time code is already recorded in the cassette B, the time code data is incremented from there. If no time code is recorded, the time code data is incremented from zero.
[0059]
Then, after the recording on the cassette B is started, the control device 17 stops the recording on the hard disk VCR 11. During this time, there is an overlapping portion where the same data is recorded between the first portion of the cassette B and the stop of recording on the hard disk VCR 11.
[0060]
At this time, the control device 17 obtains the time code at the time when the recording in the cassette B is started, and changes the time code data in the HDD (2) area to match the time code. Therefore, it is preferable that the time code at the time of starting recording on the cassette B starts from zero. By starting the time code at the time of starting recording on the cassette B from zero, it is only necessary to reset the recording time during recording in the HDD (2) area to zero at that time.
[0061]
The recording from the cassette B to the HDD (2) and the cassette C is performed in the same manner.
[0062]
As described above, recording is performed by the hard disk video deck 11 when a plurality of cassettes and cassettes are replaced, and continuous recording is possible until the recordable time reaches the limit based on the number of turns of the cassettes stored in the cassette changer.
[0063]
Here, the continuous video recording using the digital video deck 9 with a built-in cassette changer and the hard disk video deck 11 has been described, but this may use another digital video deck. For example, in the case of continuous recording by the first digital video deck 3 and the hard disk video deck 11, the user of the first digital video deck 3 is forced to replace the video cassette tape 19 on the way, but one video cassette tape 19 is required. Thus, long-time recording that cannot be completely recorded can be continuously performed.
[0064]
Further, two cassette type VCRs and a hard disk VCR may be used. In this case, a video cassette tape 19 capable of recording is set in advance on both of the two VCRs, recording is started on one of the VCRs, recording is continued on the hard disk VCR, and further recording is performed. If the recording by the digital video deck is continued, the continuous recording by the two video cassette tapes 19 can be automatically performed.
[0065]
(Playback)
Next, reproduction will be described.
[0066]
FIG. 5 is a diagram for explaining an outline of a reproducing operation in the continuous recording and reproducing system.
[0067]
Here, the opposite to the case where the recording was described earlier is described. As shown in FIGS. 5A and 5B, the reproduction of data continuously recorded by three cassettes and the hard disk VCR 11 will be described as an example. I do.
[0068]
As shown in FIG. 5C, first, a cassette (cassette A in the figure) on which data (program) to be reproduced is recorded is selected, and the cassette is set. Then, the reproduction of the data of the cassette A is started.
[0069]
When the recording time of the cassette A is near the end, the tape end point can be determined from the reel rotation speed of the cassette as in the case of recording, and the data in the same cassette is reproduced until the tape end point is detected. .
[0070]
When the tape end point is detected, the reproduction of the data recorded on the HDD (1) of the hard disk video deck 11 is started.
[0071]
At this time, the phase of the output signal is adjusted on the side of the hard disk VCR 11 so that the switching of the reproduction output signal from the cassette A to the hard disk VCR 11 is performed smoothly (so that the video and audio are not discontinuous). This is done by changing the playback speed. Therefore, the reference signal is a reproduction signal of the cassette A whose reproduction has been started first. This control is performed by the control device 17.
[0072]
When the output is switched to the reproduction signal from the hard disk video deck 11, the reproduction of the cassette A ends and the preparation for reproduction of the next cassette (the cassette B in the figure) is made.
[0073]
When the exchange of the video cassette tape 19 is performed and the preparation for reproducing the cassette B is completed, the reproduction from the cassette B is started.
[0074]
At this time, the output signal is phase-matched by changing the reproduction speed of the cassette B so that the reproduction output signal from the hard disk video deck 11 to the cassette B is smoothly switched. Therefore, the reference signal at this time is the reproduction signal of the hard disk VCR 11 whose reproduction has been started earlier.
[0075]
When the output is switched to the reproduction signal from the cassette B, the hard disk video deck 11 ends the reproduction. Then, the reproduction from the cassette B is continued until the tape end point of the cassette B is detected.
[0076]
When the tape end point of the cassette B is detected, the reproduction of the data recorded in the HDD (2) of the hard disk video deck 11 is started.
[0077]
After the phase of the reproduction signal on the hard disk VCR 11 is controlled and synchronized with the cassette B reproduction signal, the output is switched to the reproduction signal from the hard disk VCR 11.
[0078]
When the output is switched to the reproduction signal from the hard disk video deck 11, the reproduction of the cassette B ends, and the reproduction of the next cassette (the cassette C in the figure) is prepared. Then, when the cassette C is ready for reproduction, the reproduction from the cassette C is started.
[0079]
When the reproduction signal from the cassette C is phase-controlled and synchronized with the reproduction signal from the hard disk VCR 11, the output is switched to the reproduction signal from the cassette C.
[0080]
When the output is switched to the reproduction signal from the cassette C, the hard disk video deck 11 ends the reproduction.
[0081]
FIG. 6 is a diagram showing a sequence at the time of transition from the digital video deck 9 with a built-in cassette changer to the hard disk video deck 11.
[0082]
When the tape end point is detected in the digital video deck 9 with a built-in cassette changer, the signal is output to the control device 17. The controller 17 starts reproducing data on the hard disk VCR 11 based on the signal of the tape end point detection. At this time, the reproduction position of the hard disk video deck 11 is adjusted in accordance with the reproduction of the tape. Then, when the playback position of the tape matches the playback position of the hard disk VCR 11, the playback signal from the digital video deck 9 with a built-in cassette changer is switched to the playback signal from the hard disk VCR 11.
[0083]
Thereafter, the reproduction of the cassette A is stopped. The operation of adjusting the reproduction position is performed in a portion where the recording on the tape and the recording on the hard disk overlap. The adjustment of the reproduction position by the control device 17 will be described later.
[0084]
Subsequently, when the video cassette tape 19 is replaced, playback of the replaced cassette B is started, and playback from the hard disk VCR 11 and adjustment of the playback position are performed. Then, when the reproduction from the hard disk VCR 11 and the reproduction position of the cassette B coincide, the reproduction signal is switched, and the reproduction by the hard disk VCR 11 is stopped.
[0085]
Reproduction from the cassette B to the HDD (2) and the cassette C is performed in the same manner.
[0086]
As described above, the continuous reproduction by the three cassettes and the hard disk VCR 11 is performed.
[0087]
(Operation of control device)
Next, the operation of the control device 17 in the above-described continuous recording and reproduction will be described.
First, at the time of recording, the recording by the hard disk VCR 11 is started by the detection of the tape end point of the cassette A by the controller 17 as described above. The recording is started when the recording by the hard disk video deck 11 is stopped.
[0088]
On the other hand, during reproduction, the phase of the reproduced video is adjusted with reference to the DIF stream from each video deck.
[0089]
The DIF stream is input from the digital video deck to the memory and data switch controller 35 via the IEEE 1394 bus. Then, the control device 17 monitors the operation status of the digital video deck using the input DIF stream using an IEEE 1394 AV protocol command.
[0090]
When the cassette reaches the tape end point, the memory and data switch controller 35 starts the reproducing operation of the hard disk VCR 11.
[0091]
The DIF streams of both the digital video deck and the hard disk VCR 11 are input to the DIF stream. Both DIF streams are written to the corresponding first and second memories 31 and 33.
[0092]
Since the frame phases of the two input DIF streams are in an asynchronous relationship, a memory output signal synchronized with the frame is obtained by using a common (same timing) frame reset at the time of reading.
[0093]
However, at this stage, the relationship between the two DIF streams is only that the frame start phases match, and there is no guarantee that the frame times (time code values) of both DIF streams at an arbitrary time match.
[0094]
Therefore, each time code data is detected from both DIF streams output from the memory, and the output from the reference side (for example, cassette A) is adjusted with respect to the output on the reference side (for example, cassette A) so that the two values match. The stream phase (time code value) of the output of 11) is adjusted.
[0095]
FIG. 7 is a flow chart showing the phase adjustment procedure (phase adjustment processing procedure) of this stream.
[0096]
First, the time code values on the reference side and the phase adjustment side are detected, and the leading or lagging direction and the time difference are calculated from the detected time code values (S1).
[0097]
When an error is detected in the time code value, interpolation is appropriately performed according to the operation situation at that time.
[0098]
Then, the time code values on the reference side and the phase adjustment side are compared (S2). This comparison is made based on the reference side time code value−the modulation side time code value. If the answer is “n”, if the sign of “n” is positive (+), the phase on the modulation side is delayed with respect to the reference side. When the sign of “n” is negative (−), it means that the tuning side is ahead of the reference side.
[0099]
The operation on the phase adjustment side is specified by the calculation result.
[0100]
(A) When the phase adjustment side is behind the reference side, that is, in the case of "+ n", "fast forward" is instructed to the phase adjustment side (S3). By performing this fast-forwarding, the phase adjustment side comes first.
[0101]
(B) In the case where the tuning side precedes the reference side, that is, in the case of “−n”, whether the difference amount is larger than a predetermined value in order to further perform two types of operations according to the difference amount It is determined whether or not it is (S4). Here, the predetermined value is defined based on the capacity of a memory capable of storing video data in the control device 17. That is, the value is obtained by subtracting the fixed value α from the memory capacity, and the difference is divided into a case where the difference amount is larger and a case where the difference amount is smaller.
[0102]
(B-1) When the phase adjustment side largely precedes the reference side, that is, when the difference amount is larger than a value obtained by subtracting a certain value α from the memory capacity, “pause” is instructed to the phase adjustment side. (S5). By performing the pause, the stream on the phasing side is stopped, and the time code difference between the two is reduced.
[0103]
If the difference is very large (for example, if the video cassette tape 19 has not been rewound to the beginning when the transition from the hard disk VCR 11 to the cassette is performed), the "temporary Instead of "stop", "rewind" may be instructed to shorten the time required to reduce the time code difference between the two streams.
[0104]
In this case, the operation command instructing the phase-adjusting device is controlled in five modes of “stop / reproduction / pause / fixed-speed fast-forward / fixed-speed rewind”.
[0105]
(B-2) When the tuning side slightly precedes the reference side, that is, when the difference amount is not larger than the value obtained by subtracting the constant value α from the memory capacity,-constant time (x value in the figure) After "reproduction" is instructed (S6), the read address of the memory assigned to the phase adjustment side (n frames) is skipped (S8) according to the difference amount (n value) (S7).
[0106]
Here, the instruction of "reproducing" for a fixed time is made so that continuous data is stored in the memory so that continuous data can be obtained even if the read address is skipped to an arbitrary address. It is. This is because if the instruction of “fast-forward”, “rewind”, and “pause” is given immediately before skipping, the data input to the memory will be discontinuous, so skip to any address. However, since there is no guarantee that the obtained data is continuous, reproduction is performed for a certain period of time in order to match the order of the stream with respect to the memory address.
[0107]
On the other hand, at the time of writing to the memory, the data is stored in the memory so that the lower addresses are aligned in frame units. Thus, even if the value of the upper address is changed at the time of reading, the frame frequency does not change. Then, the amount of difference between the time codes is calculated, and if the upper address value is changed by that amount, data corresponding to a desired frame can be obtained.
[0108]
The details of such memory reading will be described later.
[0109]
(C) When the reference side and the phase adjustment side are in phase, that is, when the reference side time code value = the phase adjustment side time code value, "play" is instructed to the phase adjustment side as it is (S9). ).
[0110]
Then, if it is confirmed that the phase is continuously adjusted for a certain period of time (y value in the figure), that is, the time code values of the reference side and the adjustment side match (S10), the data output is performed. It instructs the switch 37 to switch the output from the reference side to the phase adjustment side (S11). The value of y is a value for checking whether or not the phase is reliably adjusted. The value of y may be arbitrarily determined. Becomes slower, and it becomes impossible to switch the reproduction output in the overlapping area portion.
[0111]
After switching the output, an instruction is given to stop the reproduction on the reference side (S12).
[0112]
This ends the phase adjustment operation.
[0113]
In the data to be output, the node ID of the output destination is specified as the output destination of the data. This is because, by specifying the node ID of the output destination for the data to be output, the user can continuously view the video on the TV monitor 21 connected to the device that started the reproduction even if the device being reproduced changes. This is to make it possible.
[0114]
For example, if the device that started the reproduction first is the first digital VCR 3, it is assumed that the user who is watching the reproduced video is the TV monitor 21 connected to the first digital VCR 3. Because the video cassette tape 19 is being reproduced on the first digital video deck 3, the reproduced video is naturally displayed on the television monitor 21 connected to the first digital video deck 3. If the data is switched to playback from the hard disk VCR 11 in the middle and the output destination of the data is not specified, the video being played from the hard disk VCR 11 is displayed on the TV monitor connected to the first digital VCR 3. 21 and cannot be watched.
[0115]
Therefore, the control device 17 specifies the first digital video deck 3 as the output destination node ID for the data to be output, so that the control device 17 is connected to the first digital video deck 3 even if the playback device changes. The video can be continuously viewed on the television monitor 21. Note that the node ID of the device that has started the reproduction first is stored in the continuous state memory 41.
[0116]
Next, address skipping of memory reading will be described.
[0117]
FIG. 8 is a diagram showing a memory map of the first memory and the second memory.
[0118]
Here, it is assumed that the first memory is a memory assigned to the reference side (digital video deck) and the second memory 33 is an assigned memory to the phase adjustment side (hard disk video deck 11). The large / small difference setting for the difference amount is set in consideration of the memory capacity, the time lag of the mechanical control, the reproduction execution time when skipping the read address of the phase adjustment side memory, and the like.
[0119]
Reproduced signals are stored in the first and second memories in frame units for each address.
[0120]
First, time code data is read from the first and second memories 31 and 33 storing both the reference side and the phase adjustment side streams. Then, as described above, the two are compared, and the memory address of the frame to be extracted is skipped according to the difference. That is, when the frame x is read from the first memory 31 on the reference side and the frame x + 2 is read from the second memory 33 on the phasing side, the difference n is +2. It is instructed to skip the address read from the second memory 33. As a result, both streams of the first and second memories 31 and 33 become coincident, so that the output signal is switched from the first memory 31 to the second memory 33.
[0121]
By performing the above-described phase control, the operation command of each device is controlled in four modes of “stop / play / pause / fixed-speed fast-forward” or “stop / play / pause / fixed-speed fast-forward / fixed”. By the control in the five modes of “fast rewind”, output streams from a plurality of devices can be phased.
[0122]
At this time, by using the IEEE 1394 standard, an extra control signal line such as a clock, a flip-flop signal, a command signal for mechanical control, and an analog / PWM signal for motor control is not required.
[0123]
The fast-forward or rewind may be a fast-forward search or a rewind search, and the same result can be obtained by moving the playback start position at a speed faster than the normal playback speed. Comparing the setting speed of fast forward and rewind with the setting speed of fast forward search and rewind search of many devices, the fast forward search and rewind search are often slower. Therefore, from the viewpoint that it is easy to finely adjust the reproduction start position, it can be said that the fast-forward search and the rewind search with a low speed are easier to handle.
[0124]
In order to perform such fine adjustment, in addition to a fast-forward search and a rewind search having a low speed, for example, further control may be added according to the difference between the reference side and the phase adjustment side.
[0125]
The control to be added is performed when the phase of the phase is slightly ahead of the phase of the reference in the phase adjustment procedure described above, that is, when (reference time code value <phase time code value: difference amount). Then, "play" and "pause" are alternately instructed to the phase adjustment side.
For example, control is performed such that "pause" is inserted once in several frames, and "reproduction" is instructed in a later period.
[0126]
As a result, each time "pause" is performed, the time code difference between the two is reduced, and when used together with "reproduction", the difference is gradually reduced.
[0127]
The ratio between the “reproduction” instruction period and the “pause” instruction period is set in consideration of the time lag of the mechanical control.
[0128]
This process is also effective when a time lag occurs between the input and output of the memory due to the setting of the memory capacity. That is, a delay of several frames occurs during a period from the detection and determination of the time code to the mechanical control and the reflection on the output stream.
[0129]
The memory capacity setting is set to an appropriate value in consideration of the reaction speed of the mechanical control with respect to the reception of the mode instruction command of each recording device, but if this delay is considered to be a non-negligible amount, the above additional processing is performed. Thus, a smoother phase adjustment control process becomes possible.
[0130]
As described above, according to the present embodiment, a long time data that cannot be recorded by one cassette tape type VCR can be automatically and continuously recorded and reproduced by a plurality of cassettes and the hard disk VCR 11. Becomes possible.
[0131]
Further, for example, even when the remaining amount of the video cassette tape 19 is exhausted during recording with one cassette tape type video deck, the recording is continued by the hard disk video deck 11 during tape replacement. In addition, it is possible to prevent video and audio from being missed during tape exchange. In addition, when the video cassette tape 19 is reproduced, even if the intermediate video or audio is recorded on a remote device, the reproduction data from the device is transmitted to the device that started the reproduction. In addition, the user can continuously view the content on the television monitor 21 connected to the device that has started the reproduction.
[0132]
As described above, according to the present embodiment, it is assumed that a family has a dedicated interchangeable recording / reproducing apparatus in each room and basically wants to perform recording using the interchangeable recording / reproducing apparatus. In such a case, in a short period of time when exchanging exchangeable recording media such as tapes, the fixed recording / reproducing device installed in another room as a common use for the family is continuously used. Recording and reproduction can be performed conveniently.
[0133]
The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment. For example, in the above-described embodiment, the continuous state memory 41 is arranged in the control device 17 as a storage unit for storing which medium the continuous data is recorded on. At the time of continuous recording by the hard disk VCR 11, it may be recorded as it is the data continuing from the video cassette tape 19 to the hard disk VCR 11, and similarly, the data continuing from the hard disk VCR 11 to the video cassette tape 19 may be recorded. It may be recorded that it is a record.
[0134]
The exchangeable recording / reproducing apparatus may be a digital video deck using the video cassette tape 19 or a DVD apparatus capable of recording / reproducing.
[0135]
Further, in the above-described embodiment, a network is formed by connecting the respective devices by the IEEE 1394 bus. However, instead of the IEEE 1394 bus, a network using Ethernet (registered trademark) or a wired or wireless network such as Bluetooth may be used. , Various networks can be used.
[0136]
It goes without saying that various modifications can be made by those skilled in the art.
[0137]
【The invention's effect】
As described above, according to the present invention, long-time data that cannot be recorded by one recording medium can be continuously recorded using a plurality of recording media, and Even if the storage capacity is lost on the way, data can be recorded on another recording medium continuously.
[0138]
When the control device stores the content in the storage medium of the exchangeable recording / reproducing device and the storage medium runs out of space, the content is continuously fixed until the storage medium is newly inserted again. In addition to the storage in the recording / reproducing apparatus, the position of the replaceable recording / reproducing apparatus until the storage medium is inserted and the time zone are stored as data for replacing the storage medium.
[0139]
Then, at the time of reproduction, the content stored in the fixed recording / reproducing apparatus that matches the position information of the replaceable recording / reproducing apparatus and the storage medium exchange data corresponding to the reproduction time is transmitted to the fixed recording / reproducing apparatus.
[0140]
For this reason, a user in a room provided with the replaceable recording / reproducing apparatus can reproduce the content without interruption even when the remaining capacity of the storage medium is lost. In other words, it is possible to use a storage medium that stores its own content regardless of the remaining capacity of the storage medium.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a continuous recording and playback system to which the present invention has been applied.
FIG. 2 is a block diagram showing a configuration inside a control device.
FIG. 3 is a drawing for explaining an outline of a recording operation in the continuous recording / reproducing system.
FIG. 4 is a diagram showing a sequence when recording is transferred from a digital video deck with a built-in cassette changer to a hard disk video deck.
FIG. 5 is a diagram for explaining an outline of a recording operation in the continuous recording and reproducing system.
FIG. 6 is a diagram showing a sequence at the time of transition from a digital video deck with a built-in cassette changer to a hard disk VCR.
FIG. 7 is a flowchart illustrating a phase adjustment procedure (phase adjustment processing procedure) of a stream.
FIG. 8 is a diagram showing a memory map of a first memory and a second memory.
[Explanation of symbols]
1 Continuous recording and playback system
3 First digital video deck
5 Second digital video deck
7 Third digital video deck
9 Digital VCR with cassette changer
11 Hard disk VCR
13 TV tuner unit
15 AV monitor
17 Control device
19 Video cassette tape
21 TV monitor
23 Movie Video Camera
25 Antenna
27 TV tuner
29 analog-digital converter
31 1st memory
33 2nd memory
35 Memory and Data Switch Controller
37 Data output switch
39 Operation command controller
41 Continuous state memory

Claims (4)

A replaceable recording / reproducing apparatus having a built-in exchangeable recording medium capable of storing moving image and audio data content, a fixed recording / reproducing apparatus capable of storing the moving image and audio data, an apparatus for capturing content, A communication bus controlled by a serial interface capable of transmitting a plurality of contents and control commands to the device in two directions at a high speed; and the video and audio are transmitted to the exchangeable recording / reproducing device or the fixed recording / reproducing device via the communication bus. A continuous recording and playback system having a control device for storing data,
The control device includes:
Means for monitoring the status of the replaceable recording and playback device, setting the recording medium, and grasping the replaceable recording and playback device storing the content;
Means for causing the fixed recording / reproducing apparatus to record the content in place of the replaceable recording / reproducing apparatus when the recording capacity of the recording medium set in the replaceable recording / reproducing apparatus becomes equal to or less than a predetermined capacity. When,
Along with the recording of the content to the fixed recording and playback device, means for storing the recording position in the fixed recording and playback device, and the recording time zone as storage medium replacement data,
At the time of the reproduction, when the reproduction position information of the storage medium of the replaceable recording / reproducing apparatus matches the data at the time of replacing the storage medium, the video / audio corresponding to the data at the time of replacing the storage medium of the fixed recording / reproducing apparatus. Means for outputting data to the exchangeable recording / reproducing apparatus which has grasped the data via the communication bus. At the time of reproducing the data on the storage medium of the replaceable recording / reproducing apparatus, the reproduction from the replaceable recording / reproducing apparatus and the reproduction from the fixed recording / reproducing apparatus are synchronized based on the data at the time of replacing the storage medium. 2. A continuous recording / reproducing system according to claim 1, further comprising means for controlling said fixed recording / reproducing device and / or said exchangeable recording / reproducing device. The control device, when recording data, when the content is continuously stored in the fixed recording / reproducing device, the fixed recording / reproducing device matches the time code being recorded on the recording medium. Means for recording the time code in
At the time of data reproduction, means for controlling a later reproduction state so that the time code of the recording medium that has started reproduction later with reference to the time code from the recording medium that has been reproduced earlier matches. 3. The continuous recording / reproducing system according to claim 1, wherein: At the time of reproduction, the control device compares the time code from the previously reproduced recording medium with the time code of the recording medium reproduced later, and reproduces the latter according to the difference between the two time code values. 4. The continuous recording / reproducing system according to claim 1, 2 or 3, wherein an instruction of a pause, a fast-forward, or a reproduction is instructed to the apparatus that performed the operation.

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