JP2005166224A - Video/audio reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video/audio reproducing device reproducing a music piece selected by a user while reproducing still images. <P>SOLUTION: The video/audio reproducing device is constituted of a spindle motor 2, an optical pickup 3, a feed motor 4, a servo control part 5, an RF amplifier 6, a processor 7, a stream separation part 9, a sub video decoder 12, a video decoder 14, an image MIX circuit 16, a video encoder 17, a monitor 18, a DAC 19, an amplifier circuit 20, a speaker 21, a system controller 22, an operation part 24, an audio input part 31, a first switch 32, an extension audio memory 33, a second switch 34, and an audio decoding circuit 35, etc. While reproducing and displaying the still images recorded on an optical disk 1, the second switch 34 selects music data stored in the extension sound memory 33, and the music data are reproduced as audio by the speaker 21 through the audio decoding circuit 35, the DAC 19, and the amplifier circuit 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a video / audio playback apparatus such as an optical disk, and more particularly to a video / audio playback apparatus in which highly compressed encoded audio data is recorded.

  In recent years, with improvements in optical pickup technology using short-wavelength lasers, high-density recording technology, and data compression technology, the capacity of recording media such as optical discs has increased, and the amount of information that can be recorded on recording media has increased dramatically. Has increased. For example, in an optical disc such as a DVD (Digital Versatile Disk) having the same diameter as a CD (Compact Disk), a sub-video that displays video data, audio data, subtitles, etc. of moving images corresponding to about two hours of movies. Data can be recorded.

  On the other hand, the DVD playback apparatus is a CD-R / RW in which highly compressed encoded audio data such as MP3 (MPEG-1 Audio Layer 3), WMA (Windows® Media Audio), and ACC (Advance Audio Coding) is recorded. More and more CD-R / RW discs that record still images taken with a digital camera or the like can be reproduced.

  As this type of video / audio playback apparatus, the one shown in FIG. 6 is known (for example, see Patent Document 1). FIG. 6 is a block diagram showing a video / audio playback apparatus.

  As shown in FIG. 6, the video / audio reproduction device disclosed in Patent Document 1 includes a spindle motor 102, an optical pickup 103, a feed motor 104, a servo control unit 105, an RF amplifier 106, a processor 107, and a stream separation unit 109. , Audio decoder 110, sub-picture decoder 112, video decoder 114, image MIX circuit 116, video encoder 117, monitor 118, DAC (digital / analog converter) 119, amplifier circuit 120, speaker 121, system controller 122, operation unit 124, and It consists of buffer memories 108, 111, 113, 115, 123.

  The spindle motor 102 rotates the DVD 101 at a predetermined rotation speed. The optical pickup 103 detects data stored in the DVD 101 and incorporates a semiconductor laser, a photodiode, and the like. The feed motor 104 moves the optical pickup 103 in the radial direction of the DVD 101. The servo control unit 105 drives the spindle motor 102 and the feed motor 104 according to instructions from the system controller 122, and moves the focal position of the semiconductor laser in the horizontal and vertical directions with respect to the recording surface of the DVD 101. In addition, various servo controls are also performed.

  The RF amplifier 106 amplifies the electric signal output from the photodiode built in the optical pickup 103. The processor 107 converts the analog signal output from the RF amplifier 106 into digital data, performs signal demodulation and error correction processing, and stores the generated digital data in the buffer memory 108. The stream separation unit 109 separates data output from the processor 107 in accordance with an instruction from the system controller 122.

  The audio decoder 110 temporarily stores the audio information output from the stream separation unit 109 in the buffer memory 111, reads out the audio information from the buffer memory 111 according to an instruction from the system controller 122, performs a predetermined decoding process, and the data. Is transferred to the DAC 119. The DAC 119 converts the digital signal output from the audio decoder 110 into an analog signal. The amplifier circuit 120 amplifies the analog signal output from the DAC 119. The speaker 121 reproduces the analog signal amplified by the amplifier circuit 120 as sound.

  The video decoder 114 performs a predetermined decoding process on the video information output from the stream separation unit 109 and transfers the data to the image MIX circuit 116. The sub-picture decoder 112 performs a predetermined decoding process on the sub-picture information output from the stream separation unit 109 and transfers the data to the image MIX circuit 116.

  The image MIX circuit 116 multiplexes the signals output from the video decoder 114 and the sub video decoder 112 according to instructions from the system controller 122. The video encoder 117 converts the digital video signal output from the image MIX circuit 116 into an analog video signal. A monitor 118 made of CRT or TFT reproduces the video data output from the video encoder 117 as an image.

The operation unit 124 includes various operation keys, and transmits a signal corresponding to the operation state of the keys to the system controller 122. The buffer memory 123 temporarily stores instruction / control information of the system controller 122. The system controller 122 instructs and controls the entire video / audio reproduction device.
Japanese Patent Laying-Open No. 2003-87745 (page 7, FIG. 4)

  In the video / audio playback device described above, a disc such as a CD-R / RW recorded with a still image taken with a digital camera or the like can be played back, but only a still image is recorded on the disc as a recording medium. During playback of the disc, there was a problem that it was not possible to play back audio, and it was impossible to view still images while listening to back music.

  The present invention has been made in view of the above problems, and an object thereof is to suppress an increase in circuit scale and reproduce a song selected by a user during still image reproduction without newly adding a memory. An object of the present invention is to provide a video / audio reproducing apparatus capable of performing the above.

  In order to achieve the above object, a video / audio reproduction device according to one aspect of the present invention is provided with a buffer memory provided for decoding audio, and a buffer encoded memory provided in a separate area from the buffer memory. A memory for storing data; a selection means for selecting whether or not to write audio data in the memory; a storage means for storing the compressed encoded audio data in the memory; and the audio data stored in the memory Clearing means for clearing, transmitting means for transmitting audio data stored in the memory to an audio decoding circuit, output means for reproducing and outputting audio data output from the audio decoding circuit, and the compression encoding It is characterized by comprising reproducing means for reproducing the audio data stored in the memory while the audio data is being reproduced or not being reproduced.

  According to the present invention, it is possible to provide a video / audio reproduction device that can suppress an increase in circuit scale and can reproduce a song selected by a user during reproduction of a still image without newly adding a memory.

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

  First, a video / audio reproduction apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a video / audio playback apparatus.

  As shown in FIG. 1, the video / audio reproduction apparatus includes a spindle motor 2, an optical pickup 3, a feed motor 4, a servo control unit 5, an RF amplifier 6, a processor 7, a stream separation unit 9, a sub video decoder 12, and a video decoder. 14, image MIX circuit 16, video encoder 17, monitor 18, DAC (digital analog converter) 19, amplifier circuit 20, speaker 21, system controller 22, operation unit 24, audio input unit 31, first switch 32, extended audio The memory 33, the second switch 34, the audio decoding circuit 35, and the buffer memories 8, 11, 13, 15, and 23 are included.

  The system controller 22 instructs and controls the entire video / audio reproduction device. The operation unit 24 includes various operation keys, and transmits a signal corresponding to the operation state of the keys to the system controller 22. The buffer memory 23 temporarily stores instruction / control information of the system controller 22.

  The spindle motor 2 rotates the optical disc 1 at a predetermined rotational speed. The optical pickup 3 detects data stored in the optical disc 1 and incorporates a semiconductor laser, a photodiode, and the like. The feed motor 4 moves the optical pickup 3 in the radial direction of the optical disc 1. The servo controller 5 drives the spindle motor 2 and the feed motor 4 according to instructions from the system controller 22, and moves the objective lens built in the optical pickup 3 to change the focal position of the semiconductor laser to the recording surface of the optical disk 1. Move horizontally and vertically. Further, various servos (focus servo, tracking servo, rotation servo) control necessary for reading data from the optical disk 1 are also performed.

  The RF amplifier 6 amplifies the electric signal output from the photodiode built in the optical pickup 3. The processor 7 converts the analog signal output from the RF amplifier 6 into digital data, performs signal demodulation and error correction processing according to the data format of the optical disc 1, and stores the generated digital data in the buffer memory 8. The stream separation unit 9 separates the data output from the processor 7 according to an instruction from the system controller 22.

  The sub-picture decoder 12 temporarily stores the sub-picture information output from the stream separator 9 in the buffer memory 13, and performs predetermined decoding on the sub-picture information output from the stream separator 9 according to an instruction from the system controller 22. Processing is performed, and the data is transferred to the image MIX circuit 16. The video decoder 14 temporarily stores the video information output from the stream separation unit 9 in the buffer memory 15, and performs predetermined decoding processing on the video information output from the stream separation unit 9 according to an instruction from the system controller 22. The data is transferred to the image MIX circuit 16.

  The image MIX circuit 16 multiplexes signals output from the sub-picture decoder 12 and the video decoder 14 according to instructions from the system controller 22. The video encoder 17 converts the digital video signal output from the image MIX circuit 16 into an analog video signal. A monitor 18 composed of CRT or TFT reproduces the video data output from the video encoder 17 as an image.

  The audio input unit 31 temporarily stores the audio information output from the stream separation unit 9 in the buffer memory 11 and transfers the audio information from the buffer memory 11 to the second switch 34 according to an instruction from the system controller 22. The first switch 32 transfers the audio information output from the stream separation unit 9 to the extended audio memory 33 only when the audio information is high compression encoded audio data such as MP3, WMA, and ACC.

  Here, the highly compressed encoded audio data is stored in the extended audio memory 33 composed of SDRAM or the like at least one song. For example, if the corresponding bit rate is 32 Kbps and the length of one song is 3 minutes, the high-compression encoded audio data compressed one or more tens of minutes compared to a CD has a capacity of 5.8 Mbit, If the corresponding bit rate is further increased, the capacity can be reduced to 5.8 Mbps or less. For this reason, the ratio of the highly compressed encoded audio data to the capacity of the extended audio memory 33 composed of SDRAM or the like is low, and the high compression encoded audio data can be sufficiently stored in the extended audio memory 33 for one or more songs.

  The audio information output from the audio input unit 31 is input to the audio decoding circuit 35 via the second switch, and is decoded by the audio decoding circuit 35 according to an instruction from the system controller 22. The decoded digital audio data is converted into an analog signal by the DAC 19, amplified by the amplifier circuit 20, and then reproduced by a speaker.

  During playback of a certain song, audio data is supplied to the extended audio memory 33 via the first switch 32. When the next song is reached, the previous song data stored in the extended audio memory 33 is cleared and the current playback is performed. The songs inside are stored. Further, when the user presses the record button of the operation unit 24 while playing a certain song, the first switch 32 supplies the extended sound memory 33 with the sound after the corresponding last song is supplied to the extended sound memory 33. Does not supply data.

  As described above, the song selected by the user can be stored in the extended sound memory 33. If it is desired to rewrite the music stored in the extended sound memory 33, the music may be cleared once by pressing the clear button on the operation unit 24.

  Next, the case where the optical disc 1 on which a still image taken with a digital camera or the like is recorded will be described with reference to the drawings. FIG. 2 is a schematic diagram showing audio playback and still image playback timing.

  As shown in FIG. 2, when the still image playback mode switch is turned on, the video data transferred from the processor 7 is decoded into the original digital video data by the video decoder 14, and the video data is transmitted via the image MIX circuit 16. It is transferred to the encoder 17 and converted into an analog video signal, and a still image is displayed on the monitor 18 after a predetermined time from the start of still image reproduction. Subsequently, still image switching and still image reproduction operations are executed to display the next still image.

  On the other hand, while the still image recorded on the optical disk 1 is being reproduced and displayed, or while nothing is being reproduced, the second switch 34 selects the music data stored in the extended audio memory 33, and this The music data is transferred to the voice decoding circuit 35. The audio decoding circuit 35 decodes the music data into original digital audio data. The decoded music data is converted into an analog signal by the DAC 19, amplified by the amplification circuit 20, and then reproduced by the speaker 21. Here, when the still image reproduction and display time is longer than the song selected by the user, this song is reproduced repeatedly.

  As described above, in the video / audio reproduction device of the present embodiment, music information stored in the extended audio memory 33 can be repeatedly reproduced while a still image shot by a digital camera or the like is being reproduced. The stored music information can be stored in the extended sound memory 33 by selecting a song that the user likes in advance.

  Furthermore, when playing back still images recorded on the optical disc 1, since there is no music and sub-picture data, a new mode (fun) is offered at a low cost while suppressing the addition of circuits to perform video and audio processing. it can.

  In the present embodiment, the previous song is cleared and each song is newly stored in the extended sound memory 33. However, it may be stored in the multiple song extended sound memory 33, and a favorite song may be selected and reproduced.

Next, a video / audio reproduction apparatus according to Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram showing a video / audio playback apparatus.
Hereinafter, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different components are described.

  As shown in FIG. 3, the video / audio reproduction apparatus includes a spindle motor 2, an optical pickup 3, a feed motor 4, a servo control unit 5, an RF amplifier 6, a processor 7, a stream separation unit 9, a sub video decoder 12, and a video decoder. 14, image MIX circuit 16, video encoder 17, monitor 18, DAC (digital analog converter) 19, amplifier circuit 20, speaker 21, system controller 22, operation unit 24, audio input unit 31, first switch 32, extended audio The memory 33, the audio decoding circuit 35, and the buffer memories 8, 11, 13, 15, and 23 are configured.

  The audio input unit 31 temporarily stores the audio information output from the stream separation unit 9 in the buffer memory 11 and transfers the audio information from the buffer memory 11 to the audio decoding circuit 35 according to an instruction from the system controller 22. The voice decoding circuit 35 decodes the voice data output from the voice input unit 31 according to an instruction from the system controller 22. The decoded digital audio data is converted into an analog signal by the DAC 19, amplified by the amplifier circuit 20, and then reproduced by the speaker 21.

  On the other hand, the audio input unit 31 is also connected to the extended audio memory 33 via the first switch 32. When the audio information output from the stream separation unit 9 is high-compression encoded, the high-compression encoding is performed. The audio data is also transferred from the audio input unit 31 to the first switch 32 and stored in the extended audio memory 33 as music information. Here, when it comes to the next song, the previous song data stored in the extended audio memory 33 is cleared, and the currently playing song is stored.

  Next, when playing back the optical disc 1 on which a still image photographed by a digital camera or the like is recorded, the first is performed while the still image recorded on the optical disc 1 is being played or nothing is being played back. The switch 32 selects the music data stored in the extended voice memory 33 and transfers the music data to the voice input unit 31, and the voice input unit 31 transfers the data to the voice decoding circuit 35. The audio decoding circuit 35 decodes the music data into the original digital audio data, and the decoded music data is converted into an analog signal by the DAC 19 and amplified by the amplifier circuit 20 and then amplified from the still image by the speaker 21. Is played back.

  As described above, in the video / audio reproduction apparatus according to the present embodiment, in addition to the effects of the first embodiment, the number of circuits added is smaller than that of the first embodiment, so that the cost can be reduced.

  Next, a video / audio reproduction apparatus according to Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram showing a video / audio playback apparatus. In this embodiment, a flash memory for storing highly compressed encoded audio data is newly provided.

  Hereinafter, in the present embodiment, the same components as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted, and only different components are described.

  As shown in FIG. 4, the video / audio reproduction apparatus includes a spindle motor 2, an optical pickup 3, a feed motor 4, a servo control unit 5, an RF amplifier 6, a processor 7, a stream separation unit 9, a sub video decoder 12, and a video decoder. 14, image MIX circuit 16, video encoder 17, monitor 18, DAC (digital analog converter) 19, amplifier circuit 20, speaker 21, system controller 22, operation unit 24, audio input unit 31, first switch 32, audio decoding The circuit 35, the flash memory 41, and the buffer memories 8, 11, 13, 15, and 23 are configured.

  The audio input unit 31 is connected to the flash memory 41 via the first switch 32, and when the audio information output from the stream separation unit 9 is high-compression encoded, the high-compression encoded audio data is It is also transferred from the voice input unit 31 to the first switch 32 and stored in the flash memory 41 as music information.

  The flash memory 41 is provided separately from the processor 7 and the system controller 22, but may be provided in the processor 7 or the system controller 22. Here, when the next song is reached, the previous song data stored in the flash memory 41 is cleared, and the currently reproduced song is stored. The music data stored in the flash memory 41 is not erased even if the video / audio playback device is turned off.

  Next, the case where the optical disc 1 on which a still image taken with a digital camera or the like is recorded will be described with reference to the drawings. FIG. 5 is a schematic diagram showing audio playback and still image playback timing.

  As shown in FIG. 5, when the video / music playback device is turned on and then the still picture playback mode switch is turned on, the video data transferred from the processor 7 is converted into the original digital video data by the video decoder 14. Decoded, transferred to the video encoder 17 via the image MIX circuit 16 and converted into an analog video signal, and displayed as a still image on the monitor 18 after a predetermined time from the start of still image reproduction. Subsequently, still image switching and still image reproduction operations are executed to display the next still image.

  On the other hand, while the video / music player is turned on and the switch of the operation unit 24 is turned on, while the still image recorded on the optical disc 1 is being played back and displayed, the first switch 32 is a flash memory memory. The music data stored in 41 is selected, and this music data is transferred to the voice input unit 31, and the voice input unit 31 transfers this music data to the voice decoding circuit 35. The audio decoding circuit 35 decodes the music data into original digital audio data. The decoded music data is converted into an analog signal by the DAC 19, amplified by the amplification circuit 20, and then reproduced by the speaker 21.

  Here, when the still image reproduction and display time is longer than the song selected by the user, this song is reproduced repeatedly. The capacity of the flash memory 41 is preferably at least 5.8 Mbit for storing music data of one or more songs.

  As described above, in the video / audio reproduction device of the present embodiment, while the power is turned on and the switch of the operation unit 24 is turned on, a still image shot with a digital camera or the like is being reproduced and displayed. Music information previously stored in the flash memory 41 can be repeatedly reproduced. The stored music information can be stored in the flash memory 21 by selecting a favorite song in advance by the user.

  The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the invention.

  For example, in the first embodiment, while a still image recorded on the optical disc 1 is played back and displayed, a song previously selected by the user is played back. However, video and music recorded on the optical disc 1 are played back. The music stored in advance in the extended sound memory 33 may be played back using the second switch 34 without playing back the music information recorded on the optical disc. Also, a new flash memory may be provided to store audio data in this flash memory.

  In this embodiment, the optical disk is described as an example of the recording medium. However, the recording medium may be a packaged medium such as a memory card, or may be a broadcast medium connected by a LAN or the like. Further, there may be a plurality of these recording media.

1 is a block diagram showing a video / audio reproduction apparatus according to Embodiment 1 of the present invention. Schematic which shows the audio | voice reproduction | regeneration and still image reproduction | regeneration timing which concern on Example 1 of this invention. The block diagram which shows the video / audio reproduction apparatus which concerns on Example 2 of this invention. FIG. 6 is a block diagram showing a video / audio reproduction device according to Embodiment 3 of the present invention. Schematic which shows the audio | voice reproduction | regeneration and still image reproduction | regeneration timing which concern on Example 3 of this invention. The block diagram which shows the conventional video / audio reproduction apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 2,102 Spindle motor 3,103 Optical pick-up 4,104 Feed motor 5,105 Servo control part 6,106 RF amplifier 7,107 Processor 8,11,13,15,23,108,111,113,115, 123 Buffer memory 9, 109 Stream separator 12, 112 Sub video decoder 14, 114 Video decoder 16, 116 Image MIX circuit 17, 117 Video encoder 18, 118 Monitor 19, 119 DAC
20, 120 Amplifier circuit 21, 121 Speaker 22, 122 System controller 24, 124 Operation unit 31 Audio input unit 32 First switch 33 Extended audio memory 34 Second switch 35 Audio decoding circuit 41 Flash memory 101 DVD

Claims (4)

A buffer memory provided for decoding audio;
A memory that is provided in a separate area from the buffer memory and stores compressed encoded audio data;
Selecting means for selecting whether to write audio data in the memory;
Storage means for storing the compression-encoded audio data in the memory;
Clearing means for clearing audio data stored in the memory;
Transmitting means for transmitting audio data stored in the memory to an audio decoding circuit;
Output means for reproducing and outputting the audio data output from the audio decoding circuit;
Reproducing means for reproducing the audio data stored in the memory while the compressed encoded audio data is being reproduced or not being reproduced,
A video / audio playback device comprising:   A flash memory is provided, and the compressed and encoded audio data stored in the memory is transferred to the flash memory, or the compressed and encoded audio data stored in the flash memory is transferred to the memory, or to the audio decoding circuit. The video / audio reproduction device according to claim 1, wherein the video / audio reproduction device is transferred.   3. The video / audio playback apparatus according to claim 1, wherein the storage unit records a song being played back in the memory, clears each song, and stores a new song in the memory. .   4. The video / audio playback apparatus according to claim 3, wherein when the song being played is saved, the song being played is stored in the memory until the end, and the next song is not stored.

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