JPH08106725A - Information-reproducing apparatus - Google Patents

Abstract

PURPOSE: To obtain a function starting the reproduction of sounds and images of a next track promptly without bringing about a soundless or an image-less state after a track is completely reproduced in an information-reproducing apparatus reproducing information of a recording medium storing information on trackes of a CD. CONSTITUTION: A valid data termination-detecting part 5 monitors data from a read part 3 which are reproduced at a faster speed than a normal reproduction speed, and transmits a valid data termination signal to a memory control part 7 when detecting the termination of valid data. A valid data start-detecting part 6 monitors data from the read part 3 and transmits a valid data start signal to the memory control part 7 when detecting the start of valid data. The memory control part 7 reads data from the read part 3, stores in a memory 8 and interrupts the storing of data when receiving the valid data termination signal. When the control part 7 receives the valid data start signal, it resumes the storing of data and at the same time reads out data stored in the memory 8 at the normal reproduction speed and outputs to a decoder 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information reproducing apparatus for reproducing a recording medium having data unnecessary for information reproduction between a certain area and another certain area.

[0002]

2. Description of the Related Art Recently, an information reproducing apparatus for reproducing a disk-shaped recording medium such as a compact disc has been widely used.

As is well known, since data is recorded on tracks on a disk in a compact disc, the access time for reproducing a track at an arbitrary position can be made very short. In order to make it easy to access such a recording medium, there is a portion in which effective data is not recorded between tracks, such as between scenes, songs, and software data.

[0004]

However, in the case where such a compact disc is continuously reproduced, the portion which does not record the effective data is also reproduced, so that the track being reproduced ends and the next track is reproduced. It was necessary for a certain amount of time to elapse before the playback of the track started. Therefore, when a long continuous data such as a movie or a concert video is divided into multiple tracks, it is not played back continuously as it is, and the playback is interrupted at the track divisions, resulting in unnatural playback. It was dead.

The present invention solves the above problem and, even when a recording medium in which a continuous long data is divided into a plurality of tracks is reproduced, the reproduction is continuously performed without interruption, and the user is not allowed to cut the track. The purpose is not to be aware of.

[0006]

In order to achieve this object, the information reproducing apparatus of the present invention has an n-fold speed (n>) for a recording medium in which a signal of valid data and a signal of invalid data are recorded in time series. 1) driving means, reading means for reading a signal from a recording medium at a speed of n times, drive control means for controlling the driving means and reading means, and reading data from the reading means to detect the end of valid data. Data obtained from the reading means by receiving the output from the valid data detecting means for outputting the valid data end signal and detecting the start of the valid data, outputting the valid data starting signal, the memory means for storing the data, and the valid data detecting means Of the data stored in the memory means and the data not stored in the memory means are controlled, and the stored data is read out from the memory means and output. Control and a memory control means for outputting a command to the drive control means, the reproduction of the effective data in the area where a series of signals is recorded on the recording medium is completed, and the effective data detection means is effective. When the end of data is detected, the reproduction of valid data in the next area starts,
The data until the valid data start is detected by the valid data detection means is not stored in the memory means by the memory control means, otherwise the data obtained by the reading means is n times as fast as the memory means. In addition, the memory control means reads out and outputs the data from the memory means at a normal speed at the same time. In particular, the memory control means operates the drive means and the reading means when the memory means cannot store the data. It is characterized in that a command is output to the drive control means so as to stop.

[0007]

With this configuration, when the reproduction of the information of a certain track is finished during the reproduction of a certain track and the sound or the image disappears into the non-speech state or the non-speech state, the storage of the information from the recording medium in the memory is interrupted. When the track's non-voice state or non-video state ends and voice or image playback starts, the storage of information from the recording medium is resumed in the memory, and the information of the non-voice part and the non-video part is not stored in the memory. As a result, only the data effective for reproducing the audio and video can be continuously stored in the memory, and the non-voice state or the no-video state between the tracks can be skipped when outputting from the memory.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic block diagram of an embodiment of the information reproducing apparatus of the present invention. This information reproducing apparatus realizes the function of immediately starting the reproduction of the next track without ending the state of no audio or video when the reproduction of a certain track is completed. In this embodiment, a CD-ROM reproducing device will be described as an example.

In FIG. 1, reference numeral 1 denotes a recording medium, which is n times the normal reproduction speed (n is larger than 1) by the drive unit 2.
The reading unit 3 drives at the normal playback speed n.
Data is read from the recording medium 1 at a double speed and supplied to three locations of a valid data end detecting section 5, a valid data start detecting section 6, and a memory control section 7, which are valid data detecting means. A drive control unit 4 controls the drive unit 2 and the reading unit 3. The valid data end detection unit 5 monitors the data obtained from the reading unit 3, and issues a valid data end signal to the memory control unit 7 when the input data is data indicating the end of the valid data. The valid data start detection unit 6 monitors the data obtained from the reading unit 3, and issues a valid data start signal to the memory control unit 7 when the input data is data indicating the start of valid data. The memory control unit 7 controls input / output of data from the reading unit 3 and commands the drive control unit according to the input valid data start signal and valid data end signal. Reference numeral 8 denotes a memory, and data is input / output under the control of the memory control unit 7. Reference numeral 9 denotes a decoder, which inputs data required for information reproduction from the memory control unit, decodes the data, and reproduces information.

The operation of the information reproducing apparatus thus constructed will be described below with reference to the drawings.

FIG. 2 is a data storage configuration diagram showing a part of the structure of the recording medium 1, and the data on the recording medium 1 is read by the reading unit 3 from left to right. FIG. 3 is a data storage configuration diagram on the memory showing a part of the structure of the memory 8 in which the data is written by the memory control unit 7. The memory control unit 7 reads the data from the left to the right of the memory 8 and the decoder 9 Output data to.

In FIG. 1 and FIG. 2, the reading unit 3 is located at the m-th position.
At the track position, the memory control unit 7 stores in the memory 8 the data read from the recording medium 1 by the driving unit 2 and the reading unit 3 at n times the normal reproduction speed. When the reading unit 3 comes to the valid data end position F, the valid data end detection unit 5 detects it and the memory control unit 7
A valid data end signal is issued to. Upon receiving the valid data end signal output from the valid data end detection unit 5, the memory control unit 7 suspends the storage of the data from the reading unit 3 in the memory 8. Next, the recording medium 1 by the reading unit 3
When the effective data start position S is reached by the continuous reproduction, the effective data start detection unit 6 detects this and issues an effective data start signal to the memory control unit 7. Upon receiving the valid data start signal, the memory control unit 7 restarts the storage of the data from the reading unit 3 in the memory 8. By this operation, the data from the reading unit 3 between the valid data end detection point and the valid data start detection point is not stored in the memory 8, but only the valid data is continuously stored. A part of the structure of the data thus stored in the memory 8 is shown in FIG. At the same time, the memory control unit 7 sequentially reads the data stored in the memory 8 and outputs it to the decoder 9. The memory control unit 7 stores data in the memory 8 at a speed n times faster than normal reproduction, whereas the memory control unit 7
Since the speed at which the data is output to the decoder 9 is the normal speed, the data gradually accumulates in the memory 8. When the memory 8 is completely filled with data, the memory control unit 7 temporarily stops storing data in the memory 8 and issues a standby command to the drive control unit 4. As a result, the reading unit 3
Waits without reading the next data. When a read-completed data area appears in the memory 8, the memory control unit 7 issues a standby release command to the drive control unit 4, and the reading unit 3 restarts reading data from the recording medium 1. On the contrary, when there is no data to be stored in the memory 8 by the memory controller 7, the memory controller 7 continues to output empty data to the decoder 9 (this is data that does not cause the decoder 9 to malfunction). When valid data is stored in the memory 8, the empty data output is ended, the data is read from the memory 8 and the output to the decoder 9 is restarted. The decoder 9, which has received the data necessary for information reproduction from the memory control unit 7, decodes the data and reproduces the information.

A method of storing data actually stored in the memory 8 will be described in detail with reference to FIGS. 1, 4, 5, 6, 7 and 8.

4 to 8 each show an overall configuration diagram on a memory. In each figure, the left end is the lower limit address, the right end is the upper limit address, and there is a lower limit address next to the upper limit address, and they are connected. Treated to. In this embodiment, it is assumed that data is input in the direction of increasing addresses, in other words, from the left end to the right end in the drawing. The blank part in the figure represents the part where the data is not stored, the shaded part represents the part where the data is stored, and the "input data position"
Represents the address from which the memory control unit 7 will store data in the memory 8, and the "output data position" represents the address from which the memory control unit 7 will read data from the memory 8.

Since the memory 8 has a finite size, the memory control unit 7 controls the data storage / data reading to / from the memory 8 as follows.

FIG. 4 shows the case where the input data position and the output data position are at the same address and there is no data to be read. When there is no data to read, the memory control unit 7 outputs empty data to the decoder 9 instead of reading the data from the memory 8.

FIG. 5 shows the structure of the memory 8 after a certain time has passed from FIG. Since the data input speed to the memory 8 is faster than the data output speed from the memory 8, the data is stored in the memory 8. Here, when the valid data of the track ends and the input data position is not updated,
Since the data output continues at a constant speed, the output data position gradually approaches the input data position. FIG. 4 shows a state in which data output continues with no input data, the stored data becomes empty, and the input data position and the output data position point to the same address.

FIG. 6 shows the structure of the memory 8 after a certain time has passed from FIG. Here, the input data position refers to the upper limit address of the memory 8, but since the memory control unit 7 is treated as if the upper limit address and the lower limit address of the memory 8 are connected, the next input data position is the lower limit of the memory 8. Will refer to the address.

FIG. 7 shows the structure of the memory 8 after a certain time has passed from FIG. The input data position in FIG. 6 is the memory 8
When the state of pointing to the upper limit address of is reached, the next data is stored from the lower limit address of the memory 8.

FIG. 8 shows the structure of the memory 8 after a certain time has passed from FIG. Here, the input data position points to the same address as the output data position. Therefore, if the data is not output from the output data position, the input data cannot be stored. In this case, the memory control unit 7 issues a standby command to the drive control unit 4, and the reading unit 3 goes into a standby state without reading the next data. When the data is read from the memory 8 and a data non-storage area is created, the memory control unit 7 issues a standby release command to the drive control unit 4, the reading unit 3 goes to read the next data, and the memory control unit 7 The storage of the data from the reading unit 3 in the data non-storage area of the memory 8 is restarted.

As described above, according to this embodiment, among the data read from the recording medium by the reading unit at n times the normal reproduction speed, the invalid data is detected by the valid data end detection unit 5 and the valid data start detection unit 6. The memory control unit 7 reads out and discards invalid data in the meantime and stores only valid data in the memory 8 at a speed of n times, and at the same time, the memory control unit 7 performs normal reproduction from the memory 8. By outputting the data read at the speed to the decoder 9, it is possible to continuously reproduce only the valid data without feeling a break between tracks without performing a special operation on the decoder 9.

In one embodiment of the present invention, the valid data end detection section 5 and the valid data start detection section 6 are configured as the valid data detection means, and the end and start are input to the memory control section by two separate signals. However, for example, one signal may be used as long as it is a state signal that outputs a high potential when valid data is detected and a low potential when invalid data is detected. Actually, at least the valid data end detection unit 5, the valid data start detection unit 6, the memory control unit 7, and the memory 8 are configured inside a one-chip microcomputer. However, in software, the same operation as in this embodiment is performed. Is done.

In this embodiment, the data read from the memory at the normal speed is input to the decoder via the memory control unit and the information is immediately reproduced. Even if another processing is performed, the effect of the present invention is not impaired.

[0025]

As described above, according to the present invention, the driving means for driving the recording medium on which the valid data signal and the invalid data signal are recorded in time series at the speed n times (n> 1), and the recording medium. Reading means for reading a signal from the device at a speed of n times, drive control means for controlling the driving means and the reading means,
The data is read from the reading means, the valid data end signal is output when the end of the valid data is detected, and the valid data start signal is output when the start of the valid data is detected, the memory means for storing the data, and the valid data. Of the data received from the detection means and received from the reading means, the control of storing the data that is stored in the memory means and the data that is not stored, the control of reading and outputting the stored data from the memory means, and the drive Memory control means for outputting a command to the control means, reproduction of valid data in an area of a recording medium in which a series of signals is recorded is completed, and the valid data detection means detects the end of valid data. , Until the start of valid data in the next area is started and the start of valid data is detected by the valid data detection means. The data is not stored in the memory means by the memory control means, and in other cases, the data obtained from the reading means is stored in the memory means at a speed n times higher, and at the same time, the memory control means stores the memory at a normal speed. The memory control means outputs the command to the drive control means so as to suspend the drive means and the reading means when the memory means cannot store the data. Due to the feature, only valid data is supplied to the decoder and invalid data between tracks can be instantly read out, and continuous playback can be performed without feeling a break between tracks. An information reproducing apparatus is provided.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an information reproducing apparatus of the present invention.

FIG. 2 is a data storage configuration diagram on a recording medium.

FIG. 3 is a block diagram of data storage on the memory.

FIG. 4 is an overall configuration diagram on the memory.

FIG. 5 is an overall configuration diagram on the memory.

FIG. 6 is an overall configuration diagram on the memory.

FIG. 7 is an overall configuration diagram on the memory.

FIG. 8 is an overall configuration diagram of the same on the memory.

[Explanation of symbols]

 1 recording medium 2 drive unit 3 reading unit 4 drive control unit 5 valid data end detection unit 6 valid data start detection unit 7 memory control unit 8 memory

Claims (2)

[Claims] 1. A drive means for driving a recording medium on which a valid data signal and an invalid data signal are recorded in time series at an n-fold speed (n> 1), and a signal from the recording medium at an n-fold speed. Reading means for reading, drive control means for controlling the driving means and the reading means, and data for reading from the reading means, outputs a valid data end signal when detecting the end of valid data, and outputs valid data when detecting the start of valid data. Valid data detecting means for outputting a start signal, memory means for storing the data, and data for storing in the memory means among the data obtained from the valid data detecting means for receiving the output from the valid data detecting means. Control the storage of data that is not performed,
It has a control for reading out and outputting the stored data from the memory means, and a memory control means for outputting a command to the drive control means, and stores a valid data of an area in which a certain series of signals is recorded on the recording medium. The data until the end of valid data is detected by the valid data detection means, the reproduction of valid data in the next area is started, and the start of valid data is detected by the valid data detection means is the memory. Data is not stored in the memory means by the control means, and in other cases, the data obtained from the reading means is stored in the memory means at a speed n times higher, and at the same time, the memory control means operates at the normal speed. An information reproducing apparatus characterized by reading and outputting data from a memory means. 2. The memory control means outputs a command to the drive control means to suspend the driving means and the reading means when the memory means cannot store data. Information reproduction device.