JP2002251827A - Information reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information reproducing device which outputs silent digital data voice when the format of digital voice output to be outputted from now on is defined concerning the output of a silent digital data voice signal. SOLUTION: Before starting the reproduction of a data stream stored in a disk 5, silent digital voice corresponding to the format of the digital voice to be outputted from now is stored in a memory 10 in advance and outputted. Thus, it is possible to prompt quick decoding of a digital bit stream.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an information reproducing apparatus for outputting silent digital audio data in digital audio output stored in a digital recording medium such as a DVD.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional information reproducing apparatus. In FIG. 4, a signal control unit 1 manages the entire system 100. In this case, the signal control unit 1 receives a request from a user by operating a remote control operation key 2 to receive a remote control signal. System 1 receiving through unit 3
00, and the controlled state is displayed on the display unit 4.

The DVD video / audio disk 5 is controlled by a disk driver 6 driven based on a command from the signal control unit 1. The data read from the disk 5 is transferred to the DVD decoder 7, and a demultiplexed audio digital output is output from the system 100.

The digital audio output output from the system 100 is converted into an audio signal decoded by an amplifier 8 with a built-in external digital audio decoder.
Output more.

[0005] By the way, as for the digital audio output at the time of reproducing the DVD, an amplifier with a built-in digital decoder which receives the digital audio output read from the disk determines which format the digital signal input after decoding conforms to. There is a problem that the sound output is delayed due to the time required for this determination.

[0006]

As described above, in an information reproducing apparatus for reproducing a digital audio signal such as a conventional DVD or the like, the digital audio output at the time of reproduction is input to the digital decoder built-in amplifier after decoding. Since it is necessary to determine which format the digital signal conforms to, there has been a problem that the audio output is slow.

[0007] The present invention relates to an information reproducing apparatus for outputting a silent digital data audio signal when a format of a digital audio output to be output from the silent digital data audio signal is determined.

[0008]

In order to solve the above-mentioned problems, an information reproducing apparatus according to the present invention reproduces a data stream stored on an optical disk, and when the power is turned on, the information reproducing apparatus stores the data stream in advance in the information reproducing apparatus. And reproducing the silent digital audio data stored in the.

The present invention is also for reproducing a data stream stored on an optical disk, and based on a format corresponding to the last loaded optical disk.
It is characterized by reproducing silent digital audio data stored in the information reproducing apparatus in advance.

[0010] A method for reproducing a data stream stored on an optical disk, wherein silent digital audio data previously stored in the information reproducing apparatus is reproduced based on a format corresponding to the disk having the largest number of loadings. It is characterized by becoming.

[0011] The present invention also relates to a device for reproducing a data stream stored in an optical disk, wherein when a type of the loaded optical disk is determined, the data stream is stored in advance in the information reproducing device based on a format corresponding to the disk. Characterized by reproducing the silent digital audio data.

Further, the present invention relates to a device for reproducing a data stream stored in a DVD optical disk, wherein when an audio data stream to be reproduced in the data stream is determined at the time of reproducing the optical disk, the information reproducing device is preliminarily transmitted to the information reproducing device. It is characterized by reproducing the stored silent digital audio data corresponding to the format of the optical disk.

Still further, the present invention relates to a device for reproducing a data stream stored on a DVD optical disk, wherein when a button for selecting an audio stream on the optical disk is selected, the data stored in advance in the information reproducing device is stored. This is characterized by reproducing the silent digital audio data corresponding to the format of the optical disk, whereby before starting the reproduction of the data stream stored in the medium, the silent digital audio according to the format of the digital audio to be output in advance is started. By outputting an audio output, prompt digital bit stream decoding can be encouraged.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system diagram for explaining an embodiment of the present invention. In FIG. 1, a signal control unit 1 comprehensively manages the entire system 100. In this case, the signal control unit 1 sends a request from a user by operating a remote control operation key 2 to a remote control signal receiving unit. 3 to control the system 100 and display the controlled state on the display unit 4.

The DVD video / audio disk 5 is controlled by a disk driver 6 driven based on a command from the signal control unit 1. The data read from the disk 5 is transferred to the DVD decoder 7, and a demultiplexed audio digital output is output from the system 100.

The digital audio output output from the system 100 is converted into an audio signal decoded by an amplifier 8 with a built-in external digital audio decoder.
Output more.

Here, the present invention is characterized by digital audio output timing. Hereinafter, the operation of selecting an audio stream from a DVD menu including the silent audio output timing will be described.

FIG. 2 shows an example of a menu displayed on the display unit 4 when the operation key 2 is operated in the reproduction mode.

In this example, an AC3 (Audio Lay
er 3), LPCM (Linear Pulse Cord Modulation),
It is assumed that there are a total of three audio streams of DTS (Digital Theater System). AC3 button 11, L so that the user can select each audio stream.
The PCM button 12 and the DTS button 13 are arranged on the menu.

FIG. 3 shows a time chart in which the horizontal axis represents time. Assuming that the button selected immediately after the menu of FIG. 2 is displayed is the AC3 button 11, the button is in the selected state S14.

When the system 100 is in the selected state S14, the signal control unit 1
It is predicted that a request to execute the C3 button 11 will be received via the remote control signal receiving unit 3, and the signal control unit 1 sends the AC3 button 11 via the disk driver 6 from the disk 5.
Gets the button command to use when is executed.

Next, the content of the button command corresponding to the AC3 button 11 is analyzed by the signal control section 1, and if the command is to reproduce the AC3 stream next, the command is stored in the memory 10 in advance. The silent AC3 stream 18 is transferred to the decoder 7, and a silent AC3 digital bit stream is output.

The external digital bit stream decoder built-in amplifier 8 connected to the system 100 receives the silent AC3 digital bit stream and recognizes that the input digital bit stream is AC3.

Similarly, the operation key 2 is operated to
When the TS button 13 is selected, a silent DTS stream 20 is output from the system 100. The amplifier 8 with a built-in digital bit stream decoder to which this is input can recognize that the digital bit stream is DTS.

Further, when the LPCM button is selected, the silent LPCM stream 19 is transmitted to the digital bit stream decoder built-in amplifier 8 in the same manner.
And the digital bit stream decoder built-in amplifier 8 can recognize that the digital bit stream is LPCM.

In this embodiment, by outputting a silent digital bit stream, an amplifier having a built-in digital bit stream decoder for receiving digital audio output of the system is informed in advance of the format of a digital bit stream to be output, such as AC3. A prompt digital bit stream decoding can be encouraged.

The present invention is not limited to the above embodiment. For example, when the type of the loaded optical disk 5 is determined, the signal control unit 1
A corresponding silent digital bit stream among the three streams 18, the silent LPCM stream 19, and the silent DTS stream 20 may be output. In this case, since the type of the disc can be determined at the time of loading, more rapid digital bit stream decoding can be promoted.

[0030] Immediately after the power is turned on, an arbitrary silent digital stream may be output from the silent AC3 stream 18, the silent LPCM stream 19, and the silent DTS stream 20. In this case, a digital audio output is obtained before loading, and a more agile digital bit stream can be encouraged.

Immediately after the power is turned on, a silent digital bit stream corresponding to the optical disk loaded last may be output. In this case, the digital audio bit stream corresponding to the format of the disc can be quickly decoded with a relatively high probability.

Further, by setting the digital audio output corresponding to the most common media format in the past, it is possible to prompt the decoding of the digital audio bit stream more appropriately adapted to the disc format.

[0032]

As described above, according to the information reproducing apparatus of the present invention, the format of the digital bit stream to be outputted, such as AC3, is pre-instructed to the amplifier with a built-in digital bit stream decoder which receives the digital audio output of the system. And prompt digital bit stream decoding.

[Brief description of the drawings]

FIG. 1 is a system diagram for describing an embodiment of the present invention.

FIG. 2 is an explanatory diagram for describing an example of an audio stream selection menu.

FIG. 3 is a time chart for explaining digital audio output.

FIG. 4 is a system diagram for explaining a conventional information reproducing apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 system 1 signal control unit 2 operation keys 3 remote control signal receiving unit 4 display unit 5 DVD video / audio disk 6 disk driver 7 DVD decoder 8 digital amplifier with built-in digital audio decoder 10 memory 18 silent AC3 stream 19: Silent LPCM stream 20: Silent DTS stream.

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[Procedure amendment]

[Submission date] April 4, 2001 (2001.4.4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

In this example, the disk 5 has AC 3, L PCM
(Linear Pulse Cord Modulation), DTS (Digital The
Assume that there are a total of three audio streams (ater System). An AC3 button 11, an LPCM button 12,
The DTS button 13 is arranged on the menu.

Claims (6)

[Claims] 1. An information reproducing apparatus for reproducing a data stream stored in an optical disk, comprising reproducing silent digital audio data stored in the information reproducing apparatus in advance when power is turned on. apparatus. 2. An information reproducing apparatus for reproducing a data stream stored on an optical disk, wherein the digital audio data previously stored in the information reproducing apparatus is reproduced based on a format corresponding to the optical disk loaded last. An information reproducing apparatus characterized by being reproduced. 3. An information reproducing apparatus for reproducing a data stream stored on an optical disk, comprising: a silent digital audio data previously stored in the information reproducing apparatus based on a format corresponding to the optical disk having the largest number of loadings. An information reproducing apparatus characterized by reproducing information. 4. An information reproducing apparatus for reproducing a data stream stored on an optical disk, wherein when the type of the loaded optical disk is determined, the information is stored in advance in the information reproducing device based on a format corresponding to the optical disk. An information reproducing apparatus characterized by reproducing reproduced silent digital audio data. 5. An information reproducing apparatus for reproducing a data stream stored on a DVD optical disk, wherein when the audio data stream to be reproduced in the data stream is determined during the reproduction of the optical disk, the information reproducing apparatus An information reproducing apparatus characterized by reproducing silent digital audio data corresponding to the format of the optical disk stored in the optical disk. 6. An information reproducing apparatus for reproducing a data stream stored on a DVD optical disk, wherein when a button for selecting an audio stream on the optical disk is selected, the information stored in the information reproducing apparatus in advance is selected. An information reproducing apparatus characterized by reproducing silent digital audio data corresponding to an optical disk format.