JPH09325837A - Information storage medium and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record a reproduction stop position when reproduction is interrupted due to the stop of power supply from a power source and to continue reproduction from the reproduction stop position at the time of restarting power supply from the power source. SOLUTION: Digital data read out of a data area 1a in a semiconductor memory 1 by address data generated from a reading address generating circuit 2 are inputted to a digital signal processing circuit 3 and outputted through a D/A converter 7 and time information (min/sec) indicating a reproducing position is continuously written in a recording area 1b with a backup function in the memory 1 through a time information reading circuit 4 and a writing circuit 5. When power supply is restarted after the interruption of reproduction due to the stop of power supply from the power source, the time information (min/sec) indicating the reproduction stop position at the interruption of reproduction is read out of the area 1b and data in the data area 1a are continuously reproduced from the reproduction stop position through the circuit 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information storage medium that reproduces data from an information storage medium such as a semiconductor memory, and that continues reproduction from a reproduction stop position when power supply is started after power supply is stopped. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, in a reproducing apparatus for reproducing a digital information storage medium other than a magnetic tape reproducing apparatus, for example, a digital medium such as a CD or a CD-ROM, the reproduction is forcibly interrupted by a user's operation or a control system is used. When the reproduction is stopped, time information corresponding to the reproduction stop position in the digital medium that has been reproduced until the interruption or immediately before the stop is stored in the memory by power backup. Based on the storage of the time information, the same time position in the digital medium is searched for when the reproduction is restarted, and the reproduction is performed from this position. In the case of a playback device installed in a car, etc., playback of digital media is interrupted by this playback device, and
When performing playback from a playback device such as a home from this playback suspension position, the user stores the display time indicating the suspension position displayed on the display device, and the playback device at home starts playback from that position. There is.

In this way, in the conventional digital media and reproducing apparatus, continuous reproduction is performed after the reproduction is stopped.

[0004]

However, in the above-mentioned conventional example, the memory and the power source for storing the time information corresponding to the reproduction position at the time of reproducing the digital medium which has been reproduced until just before the reproduction interruption or the reproduction stop. A backup circuit and a reproduction interruption or reproduction stop detection circuit are required, which increases the signal processing scale and device scale.

Further, when this position is stored and reproduced by another reproducing apparatus after the reproduction is interrupted or stopped, the user needs to accurately store the display time indicating the position,
This method has the drawback of being cumbersome.

The present invention solves the problems in the prior art as described above, and provides data indicating a reproduction stop position at which reproduction is interrupted by stopping the power supply from the power source, for example, time information (minutes and seconds). It is possible to continue recording from the data position where the recording was stopped and the reproduction was interrupted when the power supply to the power supply was started, and the signal processing scale and device scale do not increase, and handling is easy. An information storage medium and a reproducing device are provided.

[0007]

In order to achieve the above object, the information storage medium and the reproducing apparatus of the present invention, when reproduction of the information storage medium is interrupted by stopping energization of the power supply, energization from the power supply after this. At the time of start, the reproduction is continued from the reproduction stop position indicating the stored reproduction interruption position, which eliminates the need for a memory for storing time information, a power supply backup circuit, a reproduction interruption or a reproduction stop detection circuit, which have been conventionally used. Therefore, it becomes possible to easily handle the signal without increasing the signal processing scale and the device scale.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a data area for storing data, a recording area for recording reproduction stop position information of the data from this data area, and data for this recording area. Is an information storage medium provided with a backup power supply for holding.

The invention according to claim 2 is an information storage medium characterized in that the reproduction stop position information is reproduction stop address information, reproduction stop time information or reproduction stop order information.

According to a third aspect of the invention, read address generating means for generating address data for reading from a data position based on control data from a data area of the semiconductor memory, and read from the data area of the semiconductor memory. Digital signal processing means for outputting data indicating the reproduction position of the digital data together with the digital data, and writing for performing processing for continuously writing the data indicating the reproduction position from the digital signal processing means to the recording area of the semiconductor memory. And a reading means for outputting control data to the address generating means based on the reproduction stop position information recorded in the recording area of the semiconductor memory when the energization from the power source is resumed after the energization is resumed. This is a device, and playback from the playback stop position where playback was interrupted when the power was turned on. Continued becomes possible without signal processing scale and apparatus scale increases of, and has the effect that the handling is facilitated.

Next, embodiments of the present invention will be described in detail with reference to the drawings. (Embodiment 1) FIG. 1 is a schematic diagram showing the structure of an information storage medium according to an embodiment of the present invention. In FIG. 1, this information storage medium is a semiconductor memory (IC card) 1
The data area 1a for storing various data, for example, music data, and the reproduction position immediately before the power supply is stopped, that is, the time information (minutes and seconds) indicating the reproduction stop position when the reproduction is interrupted are recorded. And a recording area with backup function 1b. Further, it has a battery E for supplying power to the recording area with backup function 1b, and a connector T for attaching to and detaching from the main body device. The connector T has a terminal T1 for inputting read address data for the data area 1a and a terminal T2 for sending data read from the data area 1a. In addition, a terminal T3 for recording time information (minutes and seconds) indicating a reproduction stop position at the time of reproduction interruption in the recording area with backup function 1b, and a reproduction stop position at the time of reproduction interruption from the recording area with backup function 1b. It has a terminal T4 for reading out the indicated time information (minutes and seconds).

FIG. 2 is a block diagram showing the structure of the reproducing apparatus according to the present embodiment. 1 and 2, the semiconductor memory 1 shown in FIG. 1, a read address generation circuit 2 for generating address data of a data area read from the data area 1a of the semiconductor memory 1, and a digital data from the data area 1a of the semiconductor memory 1. It also has a digital signal processing circuit 3 for outputting the music number of the read music and time information (minutes and seconds) indicating the reproduction position from the beginning of this music number.

Further, the music information indicating the current reproduction position of the digital data output by the digital signal processing circuit 3 and the time information reading circuit 4 for reading time information from the beginning of the music number, and the semiconductor memory 1. And a writing circuit 5 for performing a process of writing time information indicating the current reproduction position in the recording area with backup function 1b.

Further, the read circuit 6 for reading time information (minutes and seconds) indicating the reproduction interruption position recorded in the recording area with backup function 1b of the semiconductor memory 1 and the digital signal processing circuit 3 from the semiconductor memory 1 are provided. It has a D / A converter 7 for converting the read digital data into an analog signal and outputting it to an equalizer (not shown) or a low-frequency amplifier. Further, it has a system controller 8 for controlling each part of the apparatus and an operation panel 9 connected to the system controller 8 for giving various operation instructions.

Next, the operation of this embodiment will be described. The semiconductor memory 1 stores digital data of music, etc. in the data area 1a, and further, together with the digital data, music piece number information and time information indicating the reproduction position from the beginning of this music number (what (Seconds) is stored. When a reproduction instruction operation is performed from the operation panel 9, the system controller 8 controls the read address generation circuit 2. The read address generating circuit 2 sends to the data area 1a of the semiconductor memory 1 an address corresponding to an operation instruction, for example,
Address data for reading data such as the beginning of the song number of the first music or from the middle of the next song is stored in the semiconductor memory 1
Output to The read digital data is input to the digital signal processing circuit 3. Digital signal processing circuit 3
Outputs the read digital data to the D / A converter 7, converts it into an analog signal, and outputs it to an equalizer (not shown), a low-frequency amplifier, or the like.

At the same time, the music information read out from the data area 1a of the semiconductor memory 1 by the digital signal processing circuit 3 together with the digital data, and the time information indicating the reproduction position from the beginning of the music number, the time information reading circuit 4 are provided. Output to. The time information (minutes and seconds) indicating the current reproduction position is written from the time information reading circuit 4 into the writing circuit 5 and the terminal 3 of the connector T.
The data is continuously written in the recording area with backup function 1b of the semiconductor memory 1 through. After that, when the power supply is stopped, the time information (minutes and seconds) indicating the reproduction stop position position at the time of the reproduction interruption at this point is written in the recording area with backup function 1b of the semiconductor memory 1. , Stop that recording.

After that, when power supply from the power source is started,
Reproduction of the semiconductor memory 1 is started. At the start of this reproduction, the system controller 8 controls the read circuit 6 to make the recording area 1 with backup function of the semiconductor memory 1
Immediately before stopping the power supply recorded in b, that is, the time information (minutes and seconds) corresponding to the reproduction stop position at the time of reproduction interruption
Is read. The system controller 8 sends the read time information (minutes and seconds) to the read address generation circuit 2 and sends the address data corresponding to this time information to the data area 1a of the semiconductor memory 1, and this address,
That is, the reproduction is started from the position of the time information (minutes and seconds) indicating the reproduction stop position corresponding to the reproduction interruption position recorded in the recording area with backup function 1b.

In the present embodiment, the semiconductor memory 1
In the above description, the time information (minutes and seconds) indicating the reproduction stop position at the time of reproduction interruption is recorded. However, instead of the time information (minutes and seconds), position information indicating the address of the reproduction position,
It is also possible to store the reproduction position order information and the like, and use the position information and the order information to perform reproduction from the reproduction stop position at the time of reproduction interruption.

[0019]

As described above, according to the present invention, when the reproduction of the information storage medium is interrupted by stopping the power supply to the power supply, the reproduction is resumed from the reproduction stop position at the time of the reproduction interruption stored when the power supply is resumed thereafter. Therefore, the memory for storing time information, the power supply backup circuit, the reproduction interruption or the reproduction stop detection circuit, etc., which have been conventionally used, are not required, and the signal processing scale and the device scale are not increased. ,
Moreover, it becomes easy to handle.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an information storage medium according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a reproducing apparatus according to the same embodiment.

[Explanation of symbols]

 1 semiconductor memory 1a data area 1b recording area with backup function 2 read address generation circuit 3 digital signal processing circuit 4 time information read circuit 5 write circuit 6 read circuit 7 D / A converter 8 system controller 9 operation panel T connector T1 T4 terminal

Claims (3)

[Claims] 1. A data area for storing data, a recording area for recording reproduction stop position information of the data from the data area, and a backup power supply for holding the data in the recording area. Information storage medium. 2. The information storage medium according to claim 1, wherein the reproduction stop position information is reproduction stop address information, reproduction stop time information or reproduction stop order information. 3. A read address generating means for generating address data for reading from a data position based on control data from a data area of the semiconductor memory, and a reproduction position of the digital data together with the digital data read from the data area of the semiconductor memory. Digital signal processing means for outputting the data indicating the above, writing means for continuously writing the data indicating the reproduction position from the digital signal processing means into the recording area of the semiconductor memory, and after stopping the power supply from the power source. A reproducing device comprising a reading means for outputting to the address generating means control data based on the reproduction stop position information recorded in the recording area of the semiconductor memory when energization is resumed.