JP2002074721A - Reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reproducing device which makes electric power consumption less than heretofore and prevents the deterioration of light emitting elements. SOLUTION: An output selection circuit 21 is controlled by a control section 20 so as to output the output signal of an AC-3 decoder circuit 13 to a light signal output terminal 16 when the control section discriminate that the data of a disk 2 is read out by a pickup 3. Also, the output selection circuit 21 is controlled by the control section 20 so as not to output an electric signal to the light signal output terminal 16 from the output selection circuit 21 when the control section discriminates that the data of the disk 2 is not read out by the pickup 3. The operation of light emitting elements 16a is stopped when the data reading is not carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus which has an optical signal output terminal and reproduces data such as sound or image recorded on a recording medium such as a CD or DVD.

[0002]

2. Description of the Related Art There is a reproducing apparatus for reading digital data such as sound or image recorded on a recording medium such as a CD, DVD or DAT and reproducing the read digital data. JP-A-10-21650 has a digital output terminal for outputting an electric signal representing digital data, and an analog output terminal for outputting an electric signal representing an analog signal. When the analog output terminal is used, the digital output terminal is used. There is disclosed a reproducing apparatus for stopping the output of the electric signal from the reproducing apparatus.

Further, an optical signal output terminal is provided as a digital output terminal for outputting a digital signal, and an electric signal representing digital data read from a recording medium is converted into an optical signal by a light emitting element built in the optical signal output terminal. In addition, a playback device capable of transmitting an optical signal to another device via an optical cable has been developed.

[0004]

However, in the conventional reproducing apparatus as described above, it is not possible to detect that the optical cable is connected to the optical signal output terminal. When the optical signal representing the data is output, and when the data is not reproduced, the light emitting element is in a light emitting state, so that when the optical signal output terminal is not used, the power loss is large, and There is a problem that the life of the light emitting element is shortened by operating the light emitting element even when it is not necessary to operate.

The present invention has been made in view of such circumstances, and when reading data from a recording medium, a light emitting element at an optical signal output terminal is required to output an optical signal corresponding to the read data. When no data is read from the recording medium, the light emission of the light emitting element is stopped, so that the light emitting element is not operated when it is not necessary to output an optical signal. It is an object of the present invention to provide a reproducing device which reduces power and prevents deterioration of a light emitting element.

Another object of the present invention is to operate a light emitting element of an optical signal output terminal when an instruction to output an optical signal is received from a user, and to receive an instruction to not output an optical signal when an instruction to output an optical signal is received. By stopping the operation of the light emitting element, the user determines whether or not another device is connected to the optical signal output terminal, and gives an instruction in accordance with the determination, so that another signal is output to the optical signal output terminal. Provided is a reproducing device that can prevent a light emitting element of an optical signal output terminal from being operated when a device is not connected, reduces power consumption as compared with the related art, and prevents deterioration of the light emitting element. It is in.

[0007]

According to a first aspect of the present invention, there is provided a reproducing apparatus comprising: a reading unit for reading data recorded on a recording medium; and a reproducing apparatus for reproducing the data read by the reading unit. An optical signal output terminal, determining means for determining whether or not the reading means has read data recorded on the recording medium, and when the determining means determines that the reading means has read the data, The light emitting element of the optical signal output terminal is caused to emit light in accordance with the data read by the reading means, and the light emitting element of the optical signal output terminal is provided when the determining means determines that the data is not read. And a light emission control means for stopping the light emission.

In the case of the reproducing apparatus according to the first invention, when the discriminating means determines that the reading means has read the data, the light emitting terminal of the optical signal output terminal outputs an optical signal corresponding to the read data. When the reading device determines that the data is not read by the determining device, the device stops operating the light emitting device to operate the light emitting device when it is not necessary to output an optical signal. Therefore, power consumption can be reduced as compared with the conventional case, and deterioration of the light emitting element can be prevented.

According to a second aspect of the present invention, there is provided a reproducing apparatus including a reading unit for reading data recorded on a recording medium, wherein the reproducing apparatus reproduces data read by the reading unit. Receiving means for receiving an instruction whether or not to output an optical signal from the optical signal output terminal; and if the receiving means receives an instruction to output an optical signal from the optical signal output terminal, the reading means When the light-emitting element of the optical signal output terminal emits light according to the read data, and the receiving unit receives an instruction not to output an optical signal from the optical signal output terminal,
Light emission control means for stopping light emission of the light emitting element of the optical signal output terminal.

In the case of the reproducing apparatus according to the second invention, when the receiving means receives an instruction to output an optical signal,
The light emitting element of the optical signal output terminal is operated to output an optical signal corresponding to the data read by the reading means, and when the receiving means receives an instruction not to output the optical signal, the light emitting element stops emitting light. By doing so, the user determines whether or not another device is connected to the optical signal output terminal, and gives an instruction in accordance with this, so that no other device is connected to the optical signal output terminal. Can prevent the light emitting element of the optical signal output terminal from operating, and can reduce power consumption and prevent deterioration of the light emitting element as compared with the related art.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments. FIG. 1 is a block diagram showing a configuration of a playback apparatus according to Embodiment 1 of the present invention.

The reproducing apparatus 1 has a pickup 3 for reading data from a disk 2 which is a DVD. The signal read from the disk 2 by the pickup 3 is
The data is converted into digital data by the RF amplifier 4 and supplied to the digital signal processing circuit 5. The digital signal processing circuit 5 performs processing such as error correction on the digital data input from the RF amplifier 4, and supplies the digital data to the stream separation circuit 6.

The stream separation circuit 6 separates the digital data supplied from the digital signal processing circuit 5 into respective bit streams of sub-pictures such as video, audio, and subtitle information. The video bitstream is MP
The signal is input to the EG2 decoder circuit 7. This video bit stream is compression-encoded by the MPEG2 system. The MPEG2 decoder circuit 7 converts the video bit stream into a digital video signal by expanding and decoding the video bit stream. The signal is input to one input terminal of the video synthesizing circuit 8.

The sub-picture bit stream output from the stream separation circuit 6 is input to a sub-picture decoder circuit 9 and subjected to a decompression process to be converted into a digital sub-picture signal. Is input to

The digital sub-picture signal input to the video synthesizing circuit 8 is synthesized with the digital video signal input to the video synthesizing circuit 8, and the digital video signal obtained by this is output to the NTSC decoder circuit 10. You. The NTSC decoder circuit 10 converts the input digital video signal into a digital signal representing an NTSC video, and this is converted by the D / A converter 11 into a D / A signal.
It is converted and output from the analog output terminal 12.

On the other hand, the audio bit stream output from the stream separation circuit 6 is input to an AC-3 decoder circuit 13. The audio bit stream is
The audio bit stream is compressed and encoded by the AC-3 method, and the AC-3 decoder circuit 13 converts the audio bit stream into a digital audio signal by expanding and decoding the audio bit stream.

The digital audio signal thus obtained is supplied to the D / D converter connected to the AC-3 decoder circuit 13.
The signal is input to the A converter 14, D / A converted, output from the analog output terminal 15, and connected to an intermediate node between the AC-3 decoder circuit 13 and the D / A converter 14 via the output selection circuit 21. The optical signal is converted into an optical signal by the connected optical signal output terminal 16 and output to the outside. The optical signal output terminal 16 includes a light emitting element 16a, and an electric signal output from the output selection circuit 21 is input to the light emitting element 16a, and the light emitting element 16a emits light in accordance with the electric signal. An optical signal is output from the output terminal 16.

The optical signal output terminal 16 has an optical cable 17
Is connected to the other end of the optical cable 17, and a power amplifier 18 is connected to the other end of the optical cable 17. The output of the power amplifier 18 is supplied to a speaker 19, and the optical signal is demodulated into an electric signal by the power amplifier 18, and the electric signal is D / A converted and then supplied to the speaker 19, and the electric signal is supplied to the speaker 19. Reproduced as listening sound.

The reproducing apparatus 1 includes a control unit 20 including a CPU, a RAM, and the like, receives an instruction given by a user operating an operation panel (not shown), and performs a reproducing process, a stopping process, and the like in accordance with the instruction. Are performed.

The output selection circuit 21 is connected to the control unit 20 and operates in response to a control signal from the control unit 20.
The output signal of the C-3 decoder circuit 13 is sent to the optical signal output terminal 1
6 and a state in which the supply of the output signal of the AC-3 decoder circuit 13 to the optical signal output terminal 16 is interrupted.

The control unit 20 determines whether or not the pickup 3 has read data from the disk 2. If the pickup 3 has read data from the disk 2,
The output selection circuit 21 is controlled so that the output signal from the C-3 decoder circuit 13 is supplied to the optical signal output terminal 16. If the pickup 3 does not read data from the disk 2, the AC-3 decoder The output selection circuit 21 is controlled so as to cut off the supply of the output signal from the circuit 13 to the optical signal output terminal 16.

Next, the processing procedure of the control processing of the output selection circuit 21 of the control unit 20 will be described. FIG. 2 is a flowchart illustrating a processing procedure of the control unit 20 according to the first embodiment. It is determined whether the pickup 3 has read data from the disk 2 (step 1). If the pickup 3 has read data, the AC-3 decoder circuit 13
Output signal from the output selection circuit 21 to the optical signal output terminal 1
6 (step 2). If the pickup 3 has not read data, the output selection circuit 21 does not output a signal to the optical signal output terminal 16 (step 3). Then, after the processing of step 2 or step 3 is completed, the processing from step 1 is repeated.

Although the playback apparatus 1 is configured to play DVDs, the invention is not limited to this, and it goes without saying that a playback apparatus such as a CD, MD, or DAT may be used.

With the above configuration, when data is read from the disk 2 by the pickup 3, the light emitting element is caused to emit light in accordance with the output signal from the AC-3 decoder circuit 13, and an optical signal is output. , Pickup 3
When the data is not read from the disk 2 by the above, the light emitting element is not caused to emit light. Therefore, disk 2
When data is not read from the memory device, light emission of the light emitting element can be stopped, and power consumption can be reduced as compared with the related art. Further, since the light emission of the light emitting element is restricted, it is possible to prevent the deterioration of the light emitting element.

Embodiment 2 FIG. 3 is a block diagram showing a configuration of the reproducing apparatus according to the second embodiment of the present invention. The control unit 20 accepts the instruction when the user operates the operation panel (not shown) to output the optical signal or not, and outputs a control signal according to the instruction to the output selection circuit. 21. That is, when the user instructs to output an optical signal, the output selection circuit 21 is switched to the AC-3 decoder circuit 1.
3 is output to the optical signal output terminal 16, and when the user instructs not to output the optical signal, the output selection circuit 21 is switched to the optical signal output terminal 1.
6 is not output.

FIG. 4 shows a control unit 20 according to the second embodiment.
6 is a flowchart showing the processing procedure of FIG. An instruction as to whether or not to output an optical signal is received from the user (step 1).
1) When an instruction to output an optical signal is received,
The output selection circuit 21 is set to an output state in which the output signal from the AC-3 decoder circuit 13 is output to the optical signal output terminal 16 (step 12). The circuit 21 is set in a stopped state in which the output to the optical signal output terminal 16 is not performed (step 1).
3), end the process.

In addition, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description is omitted.

With the above configuration, when an instruction to output an optical signal is given by the user, the light emitting element is caused to emit light in accordance with the output signal from the AC-3 decoder circuit 13, and an optical signal is output. When the user instructs not to output the optical signal, the light emitting element is not caused to emit light. Therefore, when no other device is connected to the optical signal output terminal 16, the user can instruct not to output the optical signal, and when such an instruction is given, the light emitting element emits light. , Power consumption can be reduced as compared with the conventional case. Further, since the light emission of the light emitting element is restricted, it is possible to prevent the deterioration of the light emitting element.

[0029]

As described in detail above, in the case of the reproducing apparatus according to the first invention, when the discriminating means determines that the reading means has read the data, an optical signal corresponding to the read data is output. Therefore, when the light emitting element of the optical signal output terminal is operated, and when the determining means determines that the reading means is not reading data, it is necessary to stop the light emission of the light emitting element to output the optical signal. Since the light-emitting element is not operated when there is no light-emitting element, power consumption can be reduced as compared with the related art, and deterioration of the light-emitting element can be prevented.

In the case of the reproducing apparatus according to the second aspect, when the receiving means receives an instruction to output an optical signal,
The light emitting element of the optical signal output terminal is operated to output an optical signal corresponding to the data read by the reading means, and when the receiving means receives an instruction not to output the optical signal, the light emitting element stops emitting light. By doing so, the user determines whether or not another device is connected to the optical signal output terminal, and gives an instruction in accordance with this, so that no other device is connected to the optical signal output terminal. The present invention has an excellent effect such that the light emitting element of the optical signal output terminal can be prevented from operating, the power consumption can be reduced and the light emitting element can be prevented from being deteriorated as compared with the related art. .

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a playback device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of a control unit according to the first embodiment.

FIG. 3 is a block diagram showing a configuration of a reproducing apparatus according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing a processing procedure of a control unit according to the second embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 playback device 2 disk 3 pickup 4 RF amplifier 5 digital signal processing circuit 6 stream separation circuit 7 MPEG2 decoder circuit 8 video synthesis circuit 9 sub-picture decoder circuit 10 NTSC decoder circuit 11 D / A converter 12 analog output terminal 13 AC-3 Decoder circuit 14 D / A converter 15 Analog output terminal 16 Optical signal output terminal 16a Light emitting element 17 Optical cable 18 Power amplifier 19 Speaker 20 Control unit 21 Output selection circuit

Claims (2)

[Claims] 1. A reproducing apparatus, comprising: reading means for reading data recorded on a recording medium, for reproducing the data read by the reading means, wherein an optical signal output terminal having a light emitting element; Discriminating means for discriminating whether or not the data recorded on the optical signal has been read, and when the discriminating means determines that the reading means has read the data, the optical signal output is performed in accordance with the data read by the reading means. Light emitting control means for causing the light emitting element of the terminal to emit light and stopping the light emission of the light emitting element of the optical signal output terminal when the determination means determines that the data is not read by the reading means. Characteristic playback device. 2. A reproducing apparatus, comprising: reading means for reading data recorded on a recording medium, for reproducing data read by the reading means, comprising: an optical signal output terminal having a light emitting element; Receiving means for receiving an instruction as to whether or not to output a signal; and, when the receiving means receives an instruction to output an optical signal from the optical signal output terminal, the receiving means according to the data read by the reading means. Light emission control means for causing the light emitting element of the light signal output terminal to emit light and stopping light emission of the light emitting element of the light signal output terminal when the receiving means receives an instruction not to output a light signal from the light signal output terminal. A playback device comprising: