CN100433140C - Portable video and audio vocal accompaniment equipment - Google Patents

Abstract

Based on the format of the general audio-video frame, the digital music optical disc is used as a recording medium for storing accompaniment music information and background animation information. The video-audio decoder decodes the accompaniment music information and the background animation information read by the optical reading head. The singing voice of the singer is received through a voice receiving device. The audio mixer mixes the accompaniment music information with the singer's singing voice to generate a mixed audio signal, which is then played through the audio amplifier and the speaker. The image of the singer is shot by the digital image shooting device. The video mixer mixes the background motion picture information with the image of the singer to generate a mixed video signal, which is then reproduced through the display.

Description

Portable audio-visual accompaniment equipment

【Technical field】

The present invention relates to a kind of accompaniment equipment (also known as karaoke equipment), especially to a kind of portable audio-visual accompaniment equipment, which uses a digital music disc (CD-DA) as a recording medium for storing accompaniment music and background animation, and can mix and sing The singer's voice and accompaniment music are played through the loudspeaker, while the singer's image and background animation are mixed and reproduced through the display.

【Background technique】

In recent years, accompaniment equipment has been widely used by the general public for entertainment. Common accompaniment equipment uses Video-CD or Universal Digital Disc (DVD) as a recording medium for storing accompaniment music information and background animation information. After the singer selects a song, the accompaniment device mixes the accompaniment music information stored on the recording medium with the singer's singing voice received through the microphone, and then plays it through the loudspeaker. Simultaneously, the accompaniment equipment will also present the background animation containing the words of the lyrics on the TV screen or other large displays, to prompt the singer who is singing. Therefore, the accompaniment device successfully provides the entertainment function for the singer to practice singing.

It is undeniable that the existing accompaniment equipment is not only bulky but also heavy, so it can only be fixedly placed in specific places such as the living room at home or the meeting room of the factory. In addition, existing accompaniment equipment cannot be driven by sufficient power provided by ordinary batteries, and thus is also limited by the location of the power supply, that is, it must be placed near the power outlet (socket). In particular, the existing accompaniment equipment must be used in conjunction with a TV screen, which hinders its convenience in use. As for the price considerations, since existing accompaniment equipment uses Video-CD or Universal Digital Disc (DVD) as the recording medium, expensive decoders and sophisticated servo drive systems must be used.

【Content of invention】

In view of the aforementioned problems, there is a great need to provide an accompaniment device, which can provide convenient mobility and can be used outdoors, in a car, in a room and anywhere.

Furthermore, it is highly desirable to provide a singing accompaniment device that can be driven by conventional batteries to avoid the limitations imposed by the power supply.

Furthermore, there is a great need to provide a kind of accompaniment equipment, which itself is provided with a display for reproducing background animation, so that no external TV screen is needed.

Moreover, there is a great need to provide an accompaniment device that can use a digital music disc as a recording medium, thereby only requiring a simple decoder and a cheap disc drive servo drive system, thereby achieving the advantage of lowering the price.

Therefore, an object of the present invention is to provide a portable audio-visual accompaniment device, which has the remarkable advantages of convenient mobility, battery-driven, built-in display, and economic benefits. Due to the above-mentioned advantages, the portable audio-visual accompaniment device according to the present invention can be used as an entertainment device for children and teenagers, allowing them to enjoy singing anytime and anywhere.

According to one aspect of the present invention, a portable audio-visual accompaniment device is provided, which mainly includes an audio-video decoder, an audio mixer, and a video mixer. Based on the format of the common audio-visual frame, the digital music disc is used as a recording medium for storing accompaniment music information and background animation information. The audio-video decoder decodes the accompaniment music information and background animation information read by the optical pickup head. The singing voice of the singer is received by the sound receiving device. The audio mixer mixes the accompaniment music information and the singer's singing voice to generate a mixed audio signal, and then plays a mixed sound represented by the mixed audio signal through the speaker, wherein the audio information stored on the recording medium and the The video information is formatted by at least one general video and audio frame, and each of the at least one general video and audio frame is composed of at least one synchronous audio packet, at least one control audio packet, and at least one video and audio packet, so that: the at least one synchronous Each of the audio packets has a synchronization field and a first audio field, and the first audio field stores at least one byte in the audio information; each of the at least one control audio packet has a control field bit and a second audio field, the second audio field stores at least one byte in the audio information; and each of the at least one video and audio packet has a video field and a third audio field, The third audio field stores at least one bit of the audio information.

Preferably, the portable audio-visual accompaniment device according to the present invention is further provided with an audio amplifier coupled between the audio mixer and the speaker to enhance the mixed audio signal.

The image of the singer is captured by a digital image capturing device. The video mixer mixes the background animation information and the singer's image to generate a mixed video signal, and then reproduces a mixed image represented by the mixed video signal through a display or a projector.

Preferably, the portable audio-visual accompaniment device according to the present invention is further provided with a display controller for controlling the projector to reproduce the mixed image represented by the mixed video signal in response to the mixed video signal.

【Description of drawings】

FIG. 1( a ) shows a schematic perspective view of a portable audio-visual accompaniment device according to a first embodiment of the present invention.

FIG. 1( b ) shows a schematic diagram of the operation of loading a digital music disc into a portable audio-visual accompaniment device according to the first embodiment of the present invention.

FIG. 2( a ) shows a schematic diagram of the format of an isochronous audio packet according to the present invention.

FIG. 2( b ) shows a schematic diagram of the format of the control audio packet according to the present invention.

FIG. 2(c) shows a schematic diagram of the format of the audio-video packet according to the present invention.

FIG. 2( d ) shows a schematic diagram of the format of a general audio-visual frame according to the present invention.

FIG. 3 shows a circuit block diagram of the portable audio-visual accompaniment device according to the first embodiment of the present invention.

FIG. 4 shows a schematic perspective view of a portable audio-visual accompaniment device according to a second embodiment of the present invention.

【Detailed ways】

The foregoing and other objects, features, and advantages of the present invention will be more apparent from the following description and accompanying drawings. Preferred embodiments according to the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1( a ) shows a schematic perspective view of a portable audio-visual accompaniment device 1 according to a first embodiment of the present invention. FIG. 1( b ) shows a schematic diagram of the operation of loading a digital music disc 2 into a portable audio-visual accompaniment device 1 according to the first embodiment of the present invention. Referring to FIG. 1(a), the portable audio-visual accompaniment device 1 has a housing 10, which is composed of an upper cover 10a and a lower cover 10b. The upper cover 10 a and the lower cover 10 b are connected to each other via a pivot 11 to form an openable configuration that can rotate along the pivot 11 .

The upper cover 10 a is provided with a display 12 , such as a color liquid crystal display with a size of 216 (pixels)*160 (pixels). The right side of the display 12 is provided with two operation buttons 13 for adjusting the music tempo (Tempo); and the left side of the display 12 is provided with two operation buttons 14 for adjusting the music key signature (Key). The upper cover 10a is further provided with a plurality of disc playback control buttons 15, which are used to issue commands such as playing/pausing (Play/Pause), stopping (Stop), going to the next song (Next), and forwarding a song (Previous), etc. Instructions to control operations. On the right side of the disc playback control button 15, a digital image capture device 16, such as a charge-coupled device camera (CCD Camera), is set, and whether it is activated is controlled by a switch 17 to capture an external image (such as a singer's singing image). A speaker 18 is arranged on the left side of the CD play control button 15, and the output volume is controlled by a volume adjuster 19 when the CD is played.

As shown in FIG. 1( b ), the lower cover 10 b is provided with an internal power supply area 20 , in which several batteries 21 can be inserted to provide the power required for the operation of the portable audio-visual accompaniment device 1 . Through the internal power supply area 20, the portable audio-visual accompaniment device 1 does not need to be limited by the power supply location (such as the power outlet of the home or office), and does not need additional steps for wire connection. Therefore, the portable audio-visual accompaniment device 1 has excellent usability and mobility. In order to provide multiple options for power supply, the lower cover 10b must also be provided with an external power supply port 22, which can be connected to an external power outlet through a transformer. At this time, the external power outlet provides the power required for operation.

The front end of the lower cover 10b is provided with a plurality of device connection ports 23 to 27 . The device connection port 23 is used for connecting an external sound playing device, such as earphones or speakers. The device connection ports 24 and 25 are used to connect external sound receiving devices, such as microphones, so as to receive the singer's singing voice and input it into the audio-visual accompaniment device 1 . In one embodiment, the design of setting two device connection ports 24 and 25 can connect two microphones at the same time, which not only increases the convenience of use but also provides two singers with singing competition activities. The device connection port 26 is used to connect an external image display device, such as a TV or a liquid crystal display, as another option for image reproduction. The device connection port 27 is used to connect an external digital image capture device, such as a digital video recorder, as another option for capturing external images.

Please note that in the portable audio-visual accompaniment device 1 according to the present invention, the various operations or control buttons and devices arranged on the upper cover 10a are not limited to those shown in Figures 1 (a) and 1 (b), and their arrangement is also It is not limited to those shown in Figs. 1(a) and 1(b). Similarly, the various device connection ports provided on the lower cover 10b are not limited to those shown in FIGS. 1( a ) and 1 ( b ). According to different considerations of application occasions, marketing appeals, and product prices, any design and modification of the specific appearance, shape, and arrangement of the portable audio-visual accompaniment device 1 according to the present invention will not affect the obtained results according to the present invention. effect.

As shown in Figure 1(b), when the upper cover 10a and the lower cover 10b are opened along the pivot 11, a disc-shaped groove 28 provided on the inner side of the lower cover 10b can be used to accommodate a digital music disc 29 or other disc-shaped Optical recording media. The disc playing mechanism 30 includes components such as a spindle servo motor and an optical pick-up head for playing the digital music disc 29 or other disc-shaped optical recording media loaded thereon.

The digital music disc 29 adopted according to the present invention can be a commonly used digital music disc or a digital music disc with a diameter of 108 mm in a preferred embodiment. Although in physical structure, the digital music disc 29 adopted according to the present invention is similar to the existing digital music disc, the digital music disc 29 adopted according to the present invention can record sound efficiently due to the use of a specific data format. , video, and control data, this technology is obviously different from the existing optical discs that are only used to store music information.

FIG. 2( a ) shows a schematic diagram of the format of a synchronous audio packet SAP according to the present invention. Referring to FIG. 2(a), the synchronous audio packet SAP is composed of a servo field and an audio field. The synchronization field is used to store synchronization data, and the audio field is used to store audio information. In one embodiment, the sync field can hold nine bytes of sync data, and the audio field can hold one byte of audio information. In one embodiment, the synchronous data includes nine-byte data composed of nine binary codes E1, 81, C7, E1, 81, C7, E1, 81, and C7. Each byte has 8 bits. In this embodiment, the synchronous data is actually formed by repeating the three codes E1, 81, and C7 three times. The purpose is to reduce the probability of detection errors. The nine-byte synchronous data and the one-byte audio information A jointly form a ten-byte synchronous audio packet SAP. Please note that in the synchronous audio packet SAP according to the present invention, the synchronous data is not limited to nine bytes composed of E1, 81, C7, E1, 81, C7, E1, 81, and C7, but can be composed of other two Carry codes and/or other numbers of bytes are implemented. When the storable space provided by the synchronization field is greater than the amount of synchronization data to be stored, the excess space of the synchronization field can be filled with dummy data that has no real meaning. Furthermore, the synchronous audio packet SAP according to the present invention is not limited to audio information comprising one byte, but may also include audio information of two or more than two bytes, according to the amount and amount of audio information required to be stored. It depends on the data capacity (or bandwidth) of the recording medium used. In an embodiment of the present invention, the synchronous data can be used to provide a synchronous signal required for playback and reproduction of audiovisual information and can be used as a mark of audiovisual frames.

FIG. 2( b ) shows a schematic diagram of the format of the control audio packet CAP according to the present invention. Referring to FIG. 2( b ), the control audio packet CAP is composed of a control field and an audio field. The control field is used to store control data, and the audio field is used to store audio information. In one embodiment, the control field can hold nine bytes of control data, and the audio field can hold one byte of audio information. In one embodiment, the control data includes data of nine bytes, which are respectively marked with reference symbols C ₁ to C ₉ in the figure. The nine-byte control data C ₁ to C ₉ together with the one-byte audio information A form a ten-byte control audio packet CAP. Please note that in the control audio packet CAP according to the present invention, the control data is not limited to nine bytes, but can be implemented by other numbers of bytes. When the storable space provided by the control field is greater than the amount of control data to be stored, the excess space of the control field must be filled with dummy data that has no real meaning. In an embodiment of the present invention, since there is no need to add any control data during the encoding process, the control field is completely filled with dummy data without substantial meaning. Furthermore, the control audio package CAP according to the present invention is not limited to audio information containing one byte, but may also contain audio information of two or more bytes, according to the amount and the amount of audio information required to be stored. It depends on the data capacity (or bandwidth) of the recording medium used. In an embodiment of the present invention, the control data is used to provide parameters or instructions required for image processing of the video information when the audio-video information is reproduced.

FIG. 2( c ) shows a schematic diagram of the format of the video-audio packet VAP according to the present invention. Referring to FIG. 2(c), the video and audio packet VAP is composed of a video field and an audio field. The video field is used to store video information, and the audio field is used to store audio information. In one embodiment, the video field can hold nine bytes of video information, and the audio field can hold one byte of audio information. In one embodiment, the video information includes data of nine bytes, which are respectively marked with reference symbols V ₁ to V ₉ in the figure. The nine-byte video information V ₁ to V ₉ and one-byte audio information A together form a ten-byte audio-video packet VAP. Please note that in the video and audio packet VAP according to the present invention, the video information is not limited to nine bytes, but can be implemented by other numbers of bytes, according to the amount of video information to be stored and the recording medium used. Data capacity (or bandwidth) depends. Furthermore, the audio-visual packet VAP according to the present invention is not limited to audio information comprising one byte, but may also include audio information of two or more bytes, according to the amount of audio information to be stored and the required It depends on the data capacity (or bandwidth) of the recording medium used.

FIG. 2( d ) shows a schematic diagram of the format of the UAVF according to the present invention. Referring to Fig. 2(d), a universal audio-visual frame UAVF consists of n synchronous audio packets SAP ₀ to SAP _n-1 , x control audio packets CAP ₀ to CAP _x-1 , and y audio-visual packets VAP ₀ to VAP _{x- 1} constituted. Here, n, x, and y are all positive integers. Through the marking function provided by the synchronization data, the synchronization audio packets SAP ₀ to SAP _n−1 can also be called start-of-frame (SOF).

In an embodiment according to the present invention, a CD-DA with a diameter of 108 mm is used as a recording medium for storing audiovisual information formatted by a universal audiovisual frame UAVF. Typically, the output specification of a digital music disc is 16 bits per channel, 44.1K samples per second. Since there are two audio channels, the DAM provides a bandwidth of 44,100*16*2/8=176,400 (bytes/second), where each byte has 8 bits. When the frame rate is set at 9 frames per second, during the duration of a single frame, that is, 1/9 second, the storage capacity of the digital audio disc is 176,400/9=19,600 (bytes). When the used display has 216*160 pixels, if it is desired to display image information with a resolution of 4 bits per pixel, the video information required for the display of each picture frame is 216*160*4/8= 17289 (bytes). When audio information is recorded in a digital music disc in such a way that one byte of audio information is stored in every ten bytes of data, 1960 bytes can be accommodated in a single frame duration (1/9 second). Audio information in bytes. That is, the sampling rate of audio information is 1960*9=17.64K/second.

Because audio information and video information are mixedly recorded in the two channels of the digital music disc, synchronization data must be used to indicate the start of each UAVF and the position of the audio information. As mentioned earlier, during a single frame duration (1/9 second), the storage capacity of a digital audio disc is 19,600 bytes, of which 17,280 bytes are used to store video information and 1960 bytes are used to store audio information . As a result, 360 bytes remain for storing synchronization data and/or control data, such as gamma tables or other control parameters related to video playback and reproduction.

FIG. 3 shows a circuit block diagram of the portable audio-visual accompaniment device 1 according to the first embodiment of the present invention. Referring to FIG. 3 , the digital music disc 29 is driven by a spindle servo motor 31 to rotate. The optical pick-up head 32 reads the accompaniment music information and background animation information formatted by the universal audio-visual frame UAVF stored on the digital music disc 29 . The operation unit 33 broadly summarizes various operation or control buttons 13 to 15 shown in FIG. 1( a ). Responding to the operation instructions input by the singer through the operation unit 33, the system controller 34 appropriately controls the spindle servo motor 31 and the optical pick-up head 32, thereby reading out the accompaniment music information and information selected by the singer from the digital music disc 29. Background animation information.

The accompaniment music information and background animation information obtained by the optical pickup 32 are sent to the video decoder 35 for decoding the accompaniment music information and background animation information formatted by the UAVF. Subsequently, the audio-video decoder 35 transmits the background animation information to the video processor 36 , and transmits the accompaniment music information to the audio processor 37 .

The video processor 36 performs video signal processing on the background animation information according to the control data C ₁ to C ₉ of the control field in the control audio package CAP or the control data from the system controller 34 . The video processor 36 outputs the processed background animation information to the video mixer 38 . In addition, the built-in digital image capturing device 16, or the external digital image capturing device 39 coupled to the device connection port 27, can obtain external image information, such as the singer's own image or live performance. The video mixer 38 superimposes and mixes the background animation information and the external image information. In response to the mixed background animation information and external image information, the display controller 40 enables the built-in display 12 or the external display 41 coupled to the connection port 26 to reproduce the overlapping and mixed background animation and external image information.

On the other hand, the audio processor 37 performs audio signal processing on the accompaniment music information according to the control data from the system controller 34, such as adjusting the speed and pitch of the music. The audio processor 37 outputs the processed accompaniment music information to the audio mixer 42 . In addition, the external sound receiving device 43 coupled to the device connection port 24 or 25, such as a microphone, can obtain external sound information, such as a singer's singing voice. The audio mixer 42 superimposes and mixes the accompaniment music information and the external sound information. After the audio amplifier 44 enhances the mixed accompaniment music information and external sound information, the built-in speaker 18 or the external speaker 45 coupled to the connection port 23 plays the accompaniment music and external singing that cooperate with each other.

FIG. 4 shows a schematic perspective view of a portable audio-visual accompaniment device 2 according to a second embodiment of the present invention. In the second embodiment shown in FIG. 4, the same components as those of the first embodiment shown in FIG. Let me repeat. Comparing Fig. 1 (a) with Fig. 4, the second embodiment is different from the first embodiment in that the portable audio-visual accompaniment device 2 of the second embodiment is provided with a projector 50 as an image reproduction device, to replace the first embodiment example of the display 12. Specifically, in response to the mixed background animation information and external image information, the display controller 40 enables the projector 50 to project the image to be displayed to an external screen or wall through the projection lens 51 to present a larger image frame. The projection lens 51 is designed to adjust its angle with the horizontal plane to control the projection direction. In addition, the projector 50 is also provided with an image zoom device 51 for zooming and adjusting the projected image.

Although the present invention has been described by way of illustration of preferred embodiments, it should be understood that the present invention is not limited to the disclosed embodiments. On the contrary, the present invention is intended to include various modifications and similar arrangements apparent to those skilled in the art. Accordingly, the scope of the present invention as defined by the appended claims should be interpreted in the broadest way to embrace all such modifications and similar arrangements.

Claims (8)

1, a kind of portable digital-video vocal accompaniment equipment comprises:

One recording medium stores audio-frequency information with a plurality of character groups and the video information with a plurality of character groups;

One optical read head is in order to read this audio-frequency information and this video information of being stored on this recording medium;

One audio-visual demoder is in order to decode by this audio-frequency information and this video information that this optical read head read;

One sound receiver is in order to receive an external sound information;

One Audio mixer produces a mixed audio signal in order to mix this audio-frequency information and this external sound information; And

One loudspeaker, in order to the morbid sound of broadcast by this mixed audio signal representative,

Wherein, this audio-frequency information and this video information that are stored on this recording medium are formatd by at least one general audio-visual frame,

Each of this at least one general audio-visual frame is by at least one isochronous audio package, at least one control audio package, combined with at least one audio-visual package, and is feasible:

Each of this at least one isochronous audio package has a synchronous field and one first an audio frequency field, and this first audio frequency field stores at least one bit group in this audio-frequency information;

Each of this at least one control audio package has a control field and one second an audio frequency field, and this second audio frequency field stores at least one bit group in this audio-frequency information; And

Each of this at least one audio-visual package has a video field and one the 3rd audio frequency field, and the 3rd audio frequency field stores at least one bit group in this audio-frequency information.

2, according to the portable digital-video vocal accompaniment equipment of claim 1, also comprise:

One note amplifier is coupled between this Audio mixer and this loudspeaker, in order to strengthen this mixed audio signal.

3, according to the portable digital-video of claim 1 vocal accompaniment equipment, wherein:

This synchronous field is in order to store at least together step data, to indicate the initial of this at least one general audio-visual frame;

This control field uses for the reproduction of this video information in order to store at least one control data; And

This video field is in order to store at least one bit group in this video information.

4, according to the portable digital-video of claim 1 vocal accompaniment equipment, wherein:

This first audio frequency field is arranged in this synchronous field rear;

This second audio frequency field is arranged in this control field rear; And

The 3rd audio frequency field is arranged in this video field rear.

5, according to the portable digital-video of claim 1 vocal accompaniment equipment, wherein:

This recording medium is the digital music CD of diameter 108mm.

6, according to the portable digital-video vocal accompaniment equipment of claim 1, more comprise:

One Image intake device is in order to absorb an extraneous image;

One vision mixer produces a mixed video signal in order to mix this video information and this external world's image;

One display is in order to reproduce the composite image by this mixed video signal representative; And

One display controller is in order to control this display reproduction this composite image by this mixed video signal representative in response to this mixed video signal.

7, according to the portable digital-video vocal accompaniment equipment of claim 1, more comprise:

One Image intake device is in order to absorb an extraneous image;

One vision mixer produces a mixed video signal in order to mix this video information and this external world's image;

One projector is in order to reproduce the composite image by this mixed video signal representative; And

One display controller is in order to control this projector's reproduction this composite image by this mixed video signal representative in response to this mixed video signal.

8, according to the portable digital-video of claim 7 vocal accompaniment equipment, wherein:

This projector comprises:

One projecting lens, in order to throwing on this composite image to one exterior screen, and

One image zoom lens control device is in order to this composite image of convergent-divergent.

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