JP2677061B2 - Time series data editing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time series data editing device for video, audio, etc., and more particularly to an edit point search mechanism.

[0002]

2. Description of the Related Art In editing processing of digital audio data or the like, a function capable of precisely monitoring the vicinity of a candidate point is required in order to determine an editing point intended by a user. Conventionally, a method called shuttle search or jog search is known as such a function. In this method, the vicinity of the candidate point is reproduced and monitored at a low speed, the edit target data located at the edit point is determined, and a data frame number such as a time code assigned to this data is acquired. FIG. 6 shows a typical data structure. In a data frame with a data frame number of m, an n-word data body is arranged following the data frame number.

In an editing machine such as a digital audio system, generally, an audio data body having a period of about 30 msec is used as a unit data frame, and a data format in which a so-called time code is assigned to each of them is used. In the field where accuracy is required, a function of accurately acquiring a data frame number, that is, a time code and a data word number in a frame is required as a data number of an edit point in edit point search.

In order to obtain an accurate data number of this editing point, for example, a professional digital audio editing machine has an editing system configuration shown in FIG. 4 and a search mechanism shown in FIG. In FIG. 4, 1 is a controller 5
2 is a disk interface unit (here, the disk 6 is excluded), 3 is a search processor, and 4 is an external input / output unit connected to the tape recorder 7 and the monitor 8. Further, in FIG. 5, a data number process block 10 and a main data process block 20 are provided as a search mechanism for acquiring a data number.

The above data number process block 10
Is a read / write controller 11 that outputs a read or write control signal based on a mode control signal from the system, a data frame number register 12a that captures or reads a data frame signal based on the read or write control signal, and a read Alternatively, an address offset register 13a that takes in a data word address based on a write control signal, and the data frame number register 12 based on the input of a data number request signal
A data number format unit 14 is provided for answering back to the system as the data frame number and the word address of the edit point as the data number using the data frame number fetched in a and the address offset from the address offset register 13a.

The main data process block 20 includes a read / write controller 21 which outputs a read or write control signal and an address control signal based on a mode control signal from the system, and a read or write address based on the address control signal. Generating an address generator 22a, a data memory 2 in which main data is taken in or read based on input of a read or write control signal and a read or write address.
3 is provided.

Next, a method of acquiring the data number of the edit point will be described mainly with reference to the search mechanism shown in FIG. (1) Data acquisition First, the user performs normal reproduction or the like to roughly search for candidate points. At this time, the mode control signal instructs the read / write controller (hereinafter, referred to as R / W controller) 21 of the main data process block 20 to fetch the main data into the data memory 23. Then
The address generator 22a generates a write address of the data memory 23 and sequentially buffers main data.

(2) Preparation for starting search operation Next, the user stops normal reproduction or the like in order to shift to search reproduction. At this time, the mode control signal instructs the R / W controller 21 of the main data process block 20 to stop fetching the main data into the data memory 23, and the data number of the R / W controller 11 of the data number process block A. To the data frame number register 12a. The data frame number taken into the data frame number register 12a becomes the reference point of the data frame number corresponding to the data in the data memory 23. Further, at this time, the R / W controller 11 instructs the address offset register 13a to take in the write address given to the data memory 23. This information is the reference point of the memory address and corresponds to the reference point information stored in the data frame number register 12a.

(3) Execution of Search Operation Next, the user operates the jog dial or the like to execute the search operation. At this time, the mode control signal instructs the R / W controller 21 of the main data process block 20 to start reading the main data from the data memory 23. Then, the address generator 22a of the main data process block 20 generates a read address of the data memory 23 and sequentially reproduces the main data by monitor, that is, causes the data memory 23 to output the main data. The update of the read address follows the PB speed address signal. That is, the address generator 22a changes the memory address based on the PB speed control information such as the reproduction speed designation.

(4) Determination of edit point The edit point desired by the user is determined by monitoring the audio, image and signal waveforms during search reproduction. the system,
It is necessary to know this edit point data frame number and data word number. Therefore, when the user gives an instruction to determine the edit point, the system generates a data number request signal and requests the data number corresponding to the main data that has been reproduced and monitored. Address offset register 13
a compares the current data word address with the data word address of the reference point fetched in (2) and outputs the address offset. The data number format section 14 calculates the data frame number and word number of the editing point using this address offset and the data frame number fetched in the data frame number register 12a at (2), and answers back to the system.

[0011]

However, in the above-described conventional time-series data editing apparatus, it is assumed that the data frame numbers have continuity like a time code. As described above, if there is a discontinuity point, the data frame number and word number of the correct edit point may not be returned to the system. To prevent this, if a plurality of data frame number registers are provided and the discontinuity points of the data frame numbers are recorded, the processing becomes complicated.

Further, in order that the portion of the editing material which exceeds the range of the data already fetched in the data memory can be continuously searched and reproduced, the data of the portion of the editing material which exceeds the range is searched for in the data memory during the search reproduction. However, even if the data frame numbers are completely continuous, it is no longer possible to obtain the correct edit point data frame number and word number.

The present invention has been made in order to solve the above problems and has no data frame structure.
Even in a data editing device having a structure in which a data word number is assigned to each data word, and when it is not necessary to manage the word number in a frame, it is possible to accurately know the data number during monitor reproduction. An object of the present invention is to provide a series data editing device.

[0014]

In order to achieve the above object, a time-series data editing apparatus according to the present invention is a time-series data editing apparatus for reproducing and monitoring edit-target data in a time-series manner. A reproduction memory is provided with a data memory for storing data in time series, and a data number memory for storing data numbers corresponding to monitoring target data stored in the data memory on a one-to-one basis for the same length in time series. When performing, the address follow-up mechanism for changing the read address of the data number memory according to the change of the read address of the data memory is provided.

Further, in the time-series data editing apparatus having the above-mentioned structure, the address tracking mechanism detects that the read address of the data memory approaches the start end or the end, and the data to be edited is read as a data memo. In addition to cyclically replenishing, the corresponding data number is replenished to the corresponding address of the data number memory.

[0016]

According to the present invention, the data number corresponding to the data to be monitored stored in the data memory on a one-to-one basis is stored in the data number memory for the same length in time series, and the reproduction follow-up monitor is performed by the address tracking mechanism. When performing, the read address of the data number memory is changed according to the change of the read address of the data memory.

The address tracking mechanism detects that the read address of the data memory has approached the starting end or the ending end, and cyclically replenishes the data to be edited with the data to be edited, and responds thereto. The data number is added to the corresponding address of the data number memory.

[0018]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a search mechanism according to an embodiment of the present invention, which corresponds to the conventional search mechanism shown in FIG.
In FIG. 1, the same parts as those in FIG.
The difference is that, when the read address is updated based on the PB speed control signal, when the read address exceeds the frame border by the address generator 22 in the main data process block 20, the data frame update signal is sent to the address generator 13 in the data number process block 10. The address generator 13 updates the read address of the data frame number memory 12 so as to follow the main data being reproduced. Here, the data frame number memory 12 Has a buffer memory configuration for receiving a read or write address input from the address generator 13 and storing a data number corresponding to the data to be monitored on a one-to-one basis in time series for the same length.

Next, the edit point search operation according to the configuration of FIG. 1 will be described in detail. (1) Data loading The mode control signal instructs the R / W controller 21 of the main data process block 20 to load the main data into the data memory 23. Then, the address generator 22 generates the write address of the data memory 23 and sequentially buffers the main data.
Similarly, the R / W controller 11 of the data number process block 10 is instructed to load the data frame number into the data frame number memory 12. Then
The address generator 13 generates a write address of the data frame number memory 12 and sequentially buffers the frame number. Data frame number memory 12
One data frame number recorded in 1) and one data frame surrounded by the frame border of the data memory 23 have a one-to-one correspondence as shown in FIG.

(2) Preparation for start of search operation The mode control signal instructs the R / W controller 21 of the main data process block 20 to stop fetching main data into the data memory 23, and the data number process block 10 The R / W controller 11 is instructed to stop loading the data frame number into the data frame number memory 12. At this point,
One data frame number recorded in the data frame number memory 12 and one data frame surrounded by the frame border of the data memory 23 have a one-to-one correspondence.

(3) Execution of search operation The mode control signal is sent to the R / W controller 21 of the main data process block 20 in the data memory 23.
To start reading from the main data from. Then, the address generator 22 generates a read address of the data memory 23 and sequentially reproduces the main data on the monitor, that is, outputs the data from the main data output terminal. The update of the read address follows the PB speed address signal. That is, the address generator 22 changes the memory address based on the PB speed control information such as a reproduction speed designation. At this time, the address generator 22 of the main data process block 20 checks the frame border of the data memory 23, and if the read address exceeds the frame border, sends a data frame update signal to the data number process block 10. Then, the address generator 13 of the data number process block 10 updates the read address of the data frame number memory 12 so that it follows the main data currently being reproduced.

(4) Determination of edit point The edit point desired by the user is determined by monitoring the voice, image, and signal waveforms during search reproduction. the system,
It is necessary to know this edit point data frame number and word number. Therefore, when the user gives an instruction to determine the edit point, the system generates a data number request signal and requests the data number corresponding to the main data that has been reproduced and monitored. The data number format unit 14
The data frame number output from the data frame number memory 12 of the data number process block 10 and the data word number output from the address generator 22 of the main data process block 20 are combined into a data number, which is answered back to the system. In this way, the system can always obtain accurate edit point information.

The case where the monitor range is limited to the data range acquired during the data acquisition procedure of (1) has been described above. But,
It is possible to supply a new adjacent data to the system during the search operation of (3) so that the monitor operation range is not restricted by the data memory capacity.

Next, FIG. 3 relates to the second embodiment, and the search operation will be described. The mode control signal instructs the R / W controller 21 of the main data process block 20 to start reading the main data from the data memory 23. Then, the address generator 22 generates a read address of the data memory 23,
The main data is sequentially reproduced on the monitor, that is, the data is output to the main data output. The update of the read address follows the PB speed control signal. That is, the address generator 22 changes the memory address based on the PB speed control information such as a reproduction speed designation. At that time, the address generator 22 of the main data process block 20 checks the frame border of the data memory 23. If the read address exceeds the frame border, the data frame update signal is sent to the data number process block 10.
Send to Then, the address generator 13 of the data number process block 10 updates the read address of the data frame number memory 12 so that it follows the main data currently being reproduced.

When the read address indicated by the arrow X1 in FIG. 3 is updated and reaches the address indicated by the arrow X2 in FIG. 3, since it has already exceeded the mounting range of the data memory 23, the address indicated by X3 in FIG. Substitute a memory. In this way, the read address can be cycled when it exceeds or falls below the mounting range of the data memory 23.
As shown in FIG. 3, when the read address approaches the start or end of the data memory 23, the address generator 23
Detects this and sends a more data request signal to the system. Then, the system sends a mode control signal for instructing loading of the data frame number input and the main data input to the R / W controllers 11 and 21 of the data number process block 10 and the main data process block 20. Then, the address generator 22 generates a write address as indicated by arrow X3 in FIG. 3 to update the contents of the data memory 23, and at the same time updates the contents of the data frame number memory 12.

As a result, even if the edit point determination operation described in (4) is performed when the read address is at X3 in FIG. 3, the data frame number is already updated to correspond to the new main data. Therefore, the answer back of the correct data number address can be returned to the system request.

Needless to say, the present invention is also applicable to a data editing apparatus having a structure in which each data word has a data word number without a data frame structure. Conversely, the same applies when the management of the word number in the frame is unnecessary. Further, the present invention shows an embodiment realized by hardware,
An implementation in which a part of processing is performed by software of MPU or DSP is also included in the scope of the present invention.

[0028]

As is apparent from the above description in detail, according to the present invention, the data number corresponding to the data to be monitored stored in the data number memory in a one-to-one correspondence is chronologically arranged. Only the same length is stored, and when the playback monitoring is performed by the address tracking mechanism, the read address of the data number memory is changed according to the change of the read address of the data memory, so the data frame number and word number of the edit point are accurate. You can know This makes it possible, for example, when recording material.
Discontinuity of material time code caused by joint shot
And the video field frequency that differs between black and white and color
Drop frame time code used to
A simple mechanism can be used to accurately correspond to the card. Sa
In addition, various time codes and accompanying flags
(For example, voice emphasis flag etc.)
Manage in bulk without being aware of the content and rules of change
Can be

Further, the above address tracking mechanism, together with the read address of the data memory is detected that approaches the beginning or end, cyclically replenish edited data reading is performed in the data memory, the corresponding Since the data number is replenished to the corresponding address of the data number memory, the part of the editing material exceeding the range of the data stored in the data memory is continuously searched and reproduced , and the accurate data frame number and word
You can know the number .

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of a search mechanism according to an embodiment of the present invention.

FIG. 2 is a corresponding structural diagram of a data frame number memory 12 and a data memory 23 in the embodiment of FIG.

FIG. 3 is a view corresponding to FIG. 2 according to another embodiment of the present invention.

FIG. 4 is a configuration diagram of an editing system.

FIG. 5 is a diagram corresponding to FIG. 1 of a conventional search mechanism.

FIG. 6 is a configuration diagram of a data frame.

[Explanation of symbols]

 10 data number process block 11 R / W controller 12 data frame number memory 13 address generator 14 data number format section 20 main data process block 21 R / W controller 22 address generator 23 data memory

Claims (2)

(57) [Claims] 1. A time series data editing apparatus for reproducing and monitoring edit target data in time series, wherein a pair of data memory for storing edit target data in time series and monitor target data stored in the data memory are paired. A data number memory for storing the same number of data numbers corresponding to one in time series is provided, and when performing reproduction monitoring, the read address of the data number memory is tracked according to the change of the read address of the data memory. An apparatus for editing time-series data, which is equipped with a changing address tracking mechanism. 2. The time-series data editing apparatus according to claim 1, wherein the address tracking mechanism detects that the read address of the data memory approaches the start end or the end, and edits the edit target data to be read. An apparatus for editing time-series data, characterized in that the data memory is replenished cyclically and a corresponding data number is replenished to a corresponding address of the data number memory.