JPH04284745A - Synchronization reproduction device and synchronization reproduction method - Google Patents

Abstract

PURPOSE:To attain synchronization even when plural synchronization positions are set in the case of synchronization reproduction of a data having a time attribute. CONSTITUTION:An input means 11 inputs the synchronization position of a data having plural time attributes. An arithmetic section 12 calculates a reproduction speed of the data based on the synchronization position of the data inputted by the input means 11. The reproduction speed of the data is controlled by a data reproduction section 14, and plural data reproduction sections 14 are provided. A control section 13 controls the data reproduction sections 14 based on the result of calculation of the arithmetic section 12 to control the reproduction speed of the data.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous reproduction apparatus for data having a plurality of time attributes and a synchronous reproduction method thereof.

0002

2. Description of the Related Art A conventional technique will be explained with reference to FIG. In FIG. 4, numeral 41 represents the position of data with time attributes, data A and data B, on the time axis, and 43 is a position to be synchronized.

Conventional methods for this type of synchronous playback include:
Using the synchronization signal, set the data synchronization position to 1 as shown in Figure 4.
It is common to use a method of matching only the parts.

0004

However, in such a conventional example, there is a problem in that when attempting to synchronize at a plurality of synchronization positions, the data reproduction time must be adjusted by trial and error. That is, when synchronization is performed at one synchronization position, a time difference t1 and t2 occurs between data at other synchronization positions as shown in FIG. 4, which causes a problem in that synchronization is difficult.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a method for eliminating the time lag between a plurality of synchronization positions, in which the synchronization positions of data having a plurality of time attributes are If they do not match, the playback speed of all but one of the plurality of data is changed by a predetermined function, and synchronization is achieved at a plurality of synchronization positions.

[0006]

[Operation] According to the present invention, since the playback speed of all but one of the data having multiple time attributes is continuously changed, the time lag between multiple data at multiple synchronization positions is eliminated. It can be resolved. Therefore, a plurality of pieces of data having time attributes can be synchronously reproduced at a plurality of synchronization positions.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a synchronized playback device showing an embodiment of the present invention, FIG. 2 is a time chart showing the locations of two pieces of data having time attributes and the set synchronization positions, and FIG.
is a graph showing that the reproduction speed of one data is changed by a predetermined function to enable synchronized reproduction.

In FIG. 1, reference numeral 11 indicates an input means for inputting a synchronization position, and reference numeral 12 indicates an input means for continuously changing the reproduction speed of data having a time attribute in accordance with a predetermined function so as to synchronize at the input synchronization position. 13 is a control unit which receives a signal instructing the playback speed from the calculation unit and sends a control signal to control the playback speed to the data playback unit;
Reference numeral 14 denotes a data reproducing section whose reproduction speed can be controlled by an external control signal. As shown in FIG. 1, a plurality of data reproducing sections are provided according to the number of data.

Next, a synchronized playback method showing an embodiment of the present invention will be explained with reference to FIGS. 2 and 3. Note that here, data with two time attributes, data A and data B
An example will be explained in which three synchronization positions are set.

In FIG. 2, 1 indicates the position on the time axis when data A is reproduced at the standard speed, and 2 indicates the position on the time axis when data B is reproduced at the standard speed (constant). , S11 and S21, S12 and S22, S13
and S23 indicate the set synchronization position. As shown in FIG. 2, time lags of t1, t2, and t3 occur at each synchronization position. If such a shift occurs, the reproduction speed of one of the data is changed to synchronize at the set synchronization position.

FIG. 3 is a graph in which the vertical axis represents the data reproduction position and the horizontal axis represents the elapsed time during reproduction. When played back at the standard speed, the graph becomes a straight line as shown in 31 in Figure 3, and the three synchronization positions are t1 and t2, respectively.
, t3 occurs. Therefore, the synchronization position S of data B
21, S22, S23, S21', S22', S23
', that is, a position that matches the synchronization position set in data A, and a curve as shown in 32 passing through S21', S22', and S23' is set. Note that it is possible to use a spline function or the like as a function for interpolating the curve. By differentiating the function calculated in this way, a curve representing the playback speed of data B can be obtained, and it becomes possible to synchronize at the three set synchronization positions.

Note that the present invention is not limited to the above-mentioned embodiments, and the number of synchronization positions set, the number of data, the functions used, etc. are intended to cover a wider range, and these are within the scope of the present invention. It does not exclude it from

[0014]

[Advantageous Effects of the Invention] As described in detail above, the present invention can provide the following effects.

(1) By continuously changing the playback speed using a predetermined function, a plurality of synchronization positions can be set and synchronized for a plurality of data having time attributes.

(2) By using a spline function or the like, it is possible to synchronize at a set synchronization position and to change the playback speed smoothly.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a synchronous playback device showing an embodiment of the present invention.

[Figure 2] Time chart of the location of two pieces of data with time attributes and the set synchronization position

[Figure 3] Graph showing that synchronized playback is possible by changing the playback speed of one data using a predetermined function.

[Figure 4
] Time chart showing conventional example

[Explanation of symbols]

11 Input means 12 Arithmetic unit 13 Control section 14 Data playback section

Claims (2)

[Claims] 1. An input means for inputting a plurality of synchronization positions of data having a plurality of time attributes, an arithmetic unit having a function of calculating a playback speed of the data, and a plurality of controllable playback speeds. A synchronous editing device comprising: a data reproducing section; and a control section having a function of controlling the reproduction speed of the reproducing section. 2. A step of setting a plurality of synchronization positions of data having a plurality of time attributes, and a step of setting a reproduction speed of data except one of the data when the synchronization positions do not match with respect to the time axis. 1. A synchronous playback method, comprising the step of changing by a predetermined function, and synchronizing at the synchronous position.