JP3736406B2 - Recording medium playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in detection position display when detecting the beginning or end of a song or the like as recorded content in a recording medium playback device, particularly a compact disc (CD) or the like.
[0002]
[Prior art]
Conventionally, a compact disc (CD), a digital versatile disc (DVD), a mini disc (MD), or the like has been used as a recording medium. Such a recording medium can be used not only for viewing but also for example editing a plurality of recording media into a single recording medium, or by selecting a desired piece of music or video recorded on a different recording medium. There are cases in which things are extracted and used. In particular, in the music industry and the broadcasting industry, the work of joining songs and videos is indispensable. When performing such work, it is required to accurately cut out the contents (songs and videos) recorded on each recording medium.
[0003]
For example, a plurality of music is recorded on a music CD or the like with a predetermined blank (no recording part) interposed therebetween. Therefore, when detecting the beginning of a song (cueing), it is possible to pause (pause) at “0 minute 0 second” based on this blank portion. However, the song does not always start at 0 minutes and 0 seconds. The recording medium is composed of a plurality of frames (0 to 74 for one second). In many cases, a recording signal is written from a position several frames ahead of “0 minute 0 second 0 frame”. Therefore, even if playback is started from the paused position, music playback does not always start immediately. Although the time of several frames is several tens of ms, when listening to music or the like even in such a short time, it often becomes uncomfortable.
[0004]
On the other hand, some commercial recording medium playback devices (for example, CD players) have a jog dial. The jog dial can move the frame one frame at a time. In a CD player having such a jog dial, as shown in FIG. 3, playback is repeatedly performed between a predetermined number of frames during a pause, and the playback start frame is accurately set by moving the frame forward and backward during the repeated execution. You can search. Repeated playback is executed with a playback frame group 100 composed of a predetermined number of frames before that position, for example, 10 frames, based on the position (0 min 0 sec 0 frame) that is normally paused, and the jog dial is shown in FIG. As shown, the playback frame group 100 is moved in units of frames.
[0005]
Therefore, the playback frame group is sequentially moved by the jog dial, and the frame where the music starts can be accurately searched. By recording the searched cue frame in a memory or the like and calling the frame when necessary, a good cue operation can be performed. In FIG. 3, as indicated by reference numeral 100a, it is shown that there is a recording signal from “0 minute 0 second 03 frame” and actual reproduction starts.
[0006]
[Problems to be solved by the invention]
By the way, when an editing operation or the like is performed using a plurality of CDs or the like, it may be desired to detect the end in the same manner as the beginning of a song. At this time, when the jog search as described above is performed, the recording signal of the corresponding music ends in “× minutes × second 74 frames” and the playback ends, but the playback ends. When detection is performed, no recording can be confirmed unless the jog dial is operated to the position of the next 10 frames after the end of the song. That is, although the end position of the song must be displayed in “× minute × second 74 frames”, “0 minute 0 second 9 frames”, which is the area after the end of the song, is displayed, and the searched display Is unnatural, and is very confusing and easy to misunderstand.
[0007]
The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a recording medium playback device that can clearly show the relationship between an actual search result and display when performing a jog search. It is to provide.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a pause operation means for repeatedly playing a playback frame group set by a predetermined number of frames of the recording medium during playback of the recording medium, and a position of the playback frame group. A recording medium playback apparatus comprising: jog search means that can be arbitrarily selected; and display means for displaying the current playback position of the recording medium in terms of time and the number of frames. When displaying the stop state, it has a changing means for arbitrarily changing the display identification position of the reproduction frame group.
[0009]
At this time, the change of the display identification position by the changing means can be switched at least between the case of displaying the beginning portion of the recorded contents of the recording medium and the case of displaying the end portion.
[0010]
As described above, by arbitrarily changing the display identification position of the reproduction frame group, when the search is performed by the jog search means, the contents of the actual search result can be appropriately displayed on the display means.
[0011]
Further, when the head portion or the end portion of the recorded content is selected by the jog search means, offset means for offsetting the display identification position by a predetermined number of frames with respect to the head portion or the end portion can be included. In this case, it is possible to easily and reliably avoid so-called head breaks at the head portion. In addition, since the reproduction time can be recognized by a predetermined amount longer at the end portion, it is possible to prevent breakage due to overlapping with contents to be connected later.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.
[0013]
FIG. 1 shows a configuration block diagram of a CD player 10, for example, as a recording medium playback apparatus of the present embodiment. The CD playback operation of the CD playback unit 12 is the same as the conventional one, and a detailed description thereof will be omitted. In FIG. 1, only the configuration necessary for the description of the present embodiment is shown. The CD reproducing unit 12 processes the data read from the CD with an optical pickup (not shown) and outputs it from the audio output. The control of the CD playback unit 12 is performed by a microcomputer (hereinafter referred to as a microcomputer) 14. The microcomputer 14 includes a CPU 14a that performs overall control, a ROM 14b that stores programs for CD playback and other various controls, a work area for performing various controls, and storage means that temporarily stores data. As a RAM 14c.
[0014]
The microcomputer 14 is connected to a display unit (display means) 16 that indicates the current reproduction position of the CD by time and the number of frames. The display unit 16 can display minutes (MIN) 16a, seconds (SEC) 16b, and frames (FRAME) 16c. The minutes 16a, seconds 16b, and frame 16c indicate the relative time from the head of the track. Since the minute 16a portion can record from 0 to 74 since the maximum recording time of a CD is 74 minutes, recently it may have been recorded for a longer time, and the number of minutes 16a may be changed as appropriate. Is possible. The portion of the second 16b can display 0 to 59, and the portion of the frame 16c can display 0 to 74 since 75 frames correspond to 1 second.
[0015]
The microcomputer 14 is also connected with an operation unit 18 that is directly operated by a user. The operation unit 18 includes a PLAY switch 18a for issuing a playback command to the CD playback unit 12, a PAUSE switch 18b (pause operation means) for temporarily stopping playback, a STOP switch 18c for completely stopping the CD, and an FF switch 18d for fast-forwarding. , A REW switch 18e for fast rewinding, a forward skip switch 18f for skipping forward in CD units, a backward skip switch 18g for skipping backward, and a replay frame group at the time of repetitive playback by operation of the PAUSE switch 18b A jog dial 20 (jog search means) for shifting the frame forward and backward by one frame is disposed.
[0016]
In addition, the operation unit 18 is a switch that switches between detection of the beginning and end of CD music, which is a feature of the present embodiment, that is, the display identification position of the playback frame group is arbitrarily changed in the pause state. A HEAD switch 22 used when detecting the head and an END switch 24 used when detecting the end are provided. In addition, the MEMO switch 26 for storing the display position (time) of the display unit obtained as a result of the head detection or the end detection, and when selecting the head part or the end part of the recorded content by the jog dial 20, the head part or the end part. On the other hand, an offset OFFSET switch 28 is disposed as offset means for offsetting the display identification position with respect to the display unit 16 by a predetermined number of frames. Note that there are other switches, dials, and the like for executing various functions on the actual operation unit 18, but illustration and description thereof are omitted.
[0017]
A description will be given of an operation and a display on the display unit 16 at the start detection and end detection by the CD player 10 having the above-described configuration.
[0018]
First, when head detection is performed, the head detection mode is set by pressing the HEAD switch 22. Subsequently, the forward skip switch 18f or the backward skip switch 18g is used to move to the track of the desired song, and when the jog dial 20 is operated after the PAUSE switch 18b is pressed, the position of the blank before the desired song starts is set. Repeat playback. As described above, by the operation of the PAUSE switch 18b, as shown on the right side of FIG. 2, repeated playback is started with, for example, the previous 10 frames as the playback frame group 30a on the basis of 0 minute 0 second 0 frame. The In this case, since this repeated reproduction is a blank portion between the preceding track and the next track, it is in a silent reproduction state. Therefore, the jog dial 20 is operated to move the reproduction frame group 30a frame by frame to search for a frame in which a recording signal (sound) is recorded. In the case of FIG. 2, “0 minute 0 second 3 frames” is the place where the first recording signal is included, and when the playback frame group 30a is moved to this position, the playback sound at the beginning of the song can be confirmed. In the actual confirmation work, after passing the jog dial 20 through 3 frames and confirming the start of the song based on the reproduced sound including the recording signals of the fourth frame, the fifth frame, etc., the jog dial 20 is rotated forward and backward. While reversing, “0 minute 0 second 3 frames”, which is the actual start position of the recording signal, is found. After the first frame of the song has been specified, the frame display position of the head position detected by pressing the MEMO switch 26, that is, the display of “× minute × second 74 frames” is displayed as the cue position, that is, “cue mark”. Remember as.
[0019]
Then, when actually reproducing the music to be recorded on the CD, although depending on the specifications of the CD player 10, for example, the stored display position is called by the RECALL switch 32 shown in FIG. 1, for example, the PLAY switch 18a is pressed. By doing so, playback from 0 minutes 0 seconds 3 frames is started. That is, the reproduction of the music is started without any blank time. In other specifications, the playback may be started by pressing the PAUSE switch 18b once again, or the playback may be started by pressing the HEAD switch 22 again.
[0020]
Next, a case where end detection is performed will be described. The end detection mode is set by pressing the END switch 24. Subsequently, the forward skip switch 18f or the backward skip switch 18g is used to move to the track of the desired song, and by pressing the PAUSE switch 18b and then moving the jog dial 20, the position immediately before the end of the desired song is reached. Repeat playback. In this case, by the operation of the PAUSE switch 18b, as shown on the left side of FIG. 2, repetitive reproduction is started in the vicinity of x minute × second 70 frames, for example, 10 frames as the reproduction frame group 30b. In this case, since this repeated reproduction is performed in the middle of the desired song (near the end), the sound of a part of the song is output. Therefore, the jog dial 20 is operated in the same manner as when the head is detected, and the reproduction frame group 30b is moved one frame at a time to move to the end of the song, that is, the silent state.
[0021]
By the way, in the head detection mode (when the reproduction frame group 30a is searched), as shown on the left side of FIG. 2, after passing 10 frames of 74 minutes / minutes / seconds, the jog dial 20 is rotated to the ninth frame of the blank portion. Otherwise, repeated playback will not be silent. Naturally, at this time, the display unit 16 displays “0 minute 0 second 9 frames”. In other words, the song should have ended, but it will appear as if the next song has started.
[0022]
However, in the case of the present embodiment, the display identification position of the reproduction frame group is changed as indicated by the reference numeral 30b on the left side of FIG. In other words, when the head is detected, the head portion (left end in the figure) of the playback frame 30a is set as the display identification position (time display position) of the playback frame group, but when the end is detected, the playback frame 30b is pressed by pressing the END switch 24. The end portion (the right end in the figure) is the display identification position (time display position) of the playback frame group. That is, in practice, the playback frame 30b repeatedly performs a blank operation between the desired song and the next song, but by searching for the end of the playback frame 30b, the end point of the target song (× minute × second) 74 frames) on the display unit 16. Thus, when the end position of the music can be detected, the MEMO switch 26 is pressed to store the display position of this portion as the end position of the music.
[0023]
As described above, the end of the music and the display on the display unit 16 can be displayed and stored by using the END switch 24 in a completely matched state.
[0024]
The storage of the end position can be called up and used, for example, when it is desired to accurately know the length of the song or when another song is to be connected after the end-detected song.
[0025]
The CD player 10 according to the present embodiment intentionally shifts the actual operation position of the jog dial 20 (display position of the display unit 16) and the playback position when detecting the start or end by using the jog dial 20, that is, An OFFSET switch 28 is provided to offset the display identification position for display on the display unit 16 by a predetermined number of frames with respect to the end portion. For example, when the head detection is performed, the beginning of the recording signal is completely detected, but depending on the response performance of the audio equipment used, if the sound output position and the playback operation position completely match, the playback process may be There are times when the head of the song is cut off in time. In addition, depending on the user's preference, there may be a case where the user prefers the one-tempo delayed start or intentionally delays the start. In such a case, conventionally, after detecting the head, the user intentionally operates the jog dial 20 to return it by a desired frame.
[0026]
In the present embodiment, the head detection position and the display identification position for display can be automatically moved by a set number by operating the OFFSET switch 28. In other words, the setting can be changed so that the playback starts when the jog dial 20 is operated up to the second frame when the playback starts in the third frame (see the playback frame group 30c). As a result, even if the user determines the cue mark by pressing the MEMO switch 26 at the just timing based on the reproduced sound that is repeatedly reproduced, the position of the cue mark is the actual sound output position. It is attached to two frames one frame before. That is, when playback is performed by calling a cue mark, playback starts one frame before, and a margin of one frame occurs. That is, the user can prevent the head from being cut without performing any operation each time the head is detected.
[0027]
Similarly, even when end detection is performed, the relationship between the end detection position and the display identification position can be moved by an offset amount set in advance, and the detection position can be stored. It is possible to recognize a predetermined frame longer, and it is possible to prevent breakage due to overlapping with contents to be connected later.
[0028]
In this embodiment, the CD player has been described as an example. However, the present invention can also be applied to other storage medium playback apparatuses such as a DVD player and an MD player, and the same effects can be obtained.
[0029]
【The invention's effect】
As described above, according to the present invention, when the search is performed by the jog search means by arbitrarily changing the display identification position of the reproduction frame group, the contents of the actual search result are appropriately displayed on the display means. Can be displayed.
[Brief description of the drawings]
FIG. 1 is a configuration block diagram of a CD player according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram illustrating an operation of a playback frame group of the CD player according to the embodiment of the present invention.
FIG. 3 is an explanatory diagram for explaining the operation of a playback frame group of a conventional CD player.
[Explanation of symbols]
10 CD player, 12 CD playback unit, 14 microcomputer (microcomputer), 14a CPU, 14b ROM, 14c RAM, 16 display unit, 18 operation unit, 18a PLAY switch, 18b PAUSE switch, 18c STOP switch, 18d FF switch, 18e REW Switch, 18f forward skip switch, 18g backward skip switch, 20 jog dial, 22 HEAD switch, 24 END switch, 26 MEMO switch, 28 OFFSET switch, 30a, 30b Playback frame group, 32 RECALL switch.

Claims (3)

Pause operation means for repeatedly playing back a playback frame group set at a predetermined number of frames of the recording medium during playback of the recording medium;
Jog search means capable of arbitrarily selecting the position of the playback frame group;
Display means for displaying the current playback position of the recording medium in terms of time and number of frames;
A recording medium playback device including:
A recording medium reproducing apparatus comprising: a changing unit for arbitrarily changing a display identification position of a reproduction frame group when displaying the reproduction pause state on the display unit. The apparatus of claim 1.
The recording medium reproducing apparatus characterized in that the change of the display identification position by the changing means can be switched at least between the case of displaying the beginning portion of the recorded contents of the recording medium and the case of displaying the end portion. The apparatus of claim 2, wherein
The recording medium further comprises offset means for offsetting the display identification position by a predetermined number of frames with respect to the head portion or the end portion when the head portion or the end portion of the recorded content is selected by the jog search means. Playback device.

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