KR101281814B1 - Photographing apparatus capable of recording stereophonic and the method thereof - Google Patents

Abstract

Provided are a photographing apparatus capable of stereoscopic sound recording and a method thereof. The photographing apparatus includes: an imaging unit for generating a video signal through imaging, a first receiving audio from a first direction through a first microphone, and receiving audio from a second direction via a second microphone to generate an audio signal An audio receiver, a second audio receiver for receiving audio from a third direction through a third microphone and receiving audio from a fourth direction through a fourth microphone, to generate an audio signal, and an audio signal output from the first audio receiver. And a mixing unit for generating one audio signal and a recording unit for recording the video signal generated by the imaging unit and the audio signal generated by the mixing unit based on the audio signals output from the second audio receiver. do. Accordingly, stereophonic sound can be recorded without changing the format and changing the recorded capacity.

DVC, filming equipment, stereo sound

Description

Photographic apparatus capable of recording stereophonic and the method

1 is a block diagram schematically showing a photographing apparatus capable of stereo sound recording according to an embodiment of the present invention;

2 is a flowchart provided to explain a stereophonic sound recording method according to an embodiment of the present invention; and

3A and 3B are diagrams provided for explaining a stereoscopic sound recording method according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: operation unit 102: imaging unit

104: video signal processing unit 106: video output unit

108: first audio receiver 110: the first microphone

112: second microphone 114: second audio receiver

116: third microphone 118: fourth microphone

120: first audio signal processor 122: second audio signal processor

124: mixing section 126: codec

128: recording unit 130: audio output unit

132 control unit

The present invention relates to a recording apparatus capable of stereoscopic sound recording and a method thereof, and more particularly, to stereoscopic recording without changing the capacity to be recorded and formatted to record four channels of sound in conventional two-channel sound recording. The present invention relates to a possible photographing apparatus and a method thereof.

The photographing apparatus receives light reflected from a subject through a lens, forms an image on a photosensitive material, and receives and records a corresponding video signal. In addition, when an external sound wave passes through an input device such as a microphone, an audio signal having a continuous voltage difference is recorded. The audio and video signals recorded as described above are output through the video display device and the speaker according to the user's operation.

The photographing apparatus as described above recorded the change of magnetism on the tape of the magnetic material with the received video and audio signal analog signals. However, the digital recording method has emerged because of noise and easy editing. The digital record records the voltage variation as consecutive binary numbers (0 and 1) rather than magnetic.

Digital video camcorder (DVC) is a representative apparatus for recording video and audio signals in a digital recording method in a photographing apparatus.

The audio used by the existing DVC is recorded as a PCM signal by using an A / D (Analog / Digital) converter and a stereo circuit commonly used, and when played back, the PCM signal is analogized via a D / A (Digital / Analog) converter. It is a system to output.

However, as the user's level improves, they want a better sound with a sound system such as a home theater, and the demands of the future are also seeking higher sound quality. In DVD, 5.1CH has high sound quality, and according to the market situation, DVC wants to realize sound system from 2CH stereo to 4CH in a realistic sense.

In the conventional DVC, basic sound effects were possible by implementing a sound system through 2CH stereo, but physical constraints are applied to implement stereoscopic sound like a home theater. For example, there is a limit in expressing three-dimensional original sound because it is impossible to express front, rear, left and right.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a recording apparatus and method capable of stereoscopic sound recording without changing a format and recording capacity for recording four-channel sound in conventional two-channel sound recording.

According to the present invention for solving the above technical problem, the image pickup unit for generating a video signal through imaging, the first microphone receives the audio from the first direction, the second microphone through the second microphone A first audio receiver configured to receive audio from a direction to generate an audio signal, a second to receive audio from a third direction through a third microphone, and to receive audio from a fourth direction through a fourth microphone to generate an audio signal An audio receiver, a mixer for generating one audio signal based on the audio signals output from the first audio receiver and the audio signals output from the second audio receiver, and a video signal generated by the imaging unit and the And a recording unit for recording the audio signal generated by the mixing unit.

The first audio signal processor converts the analog audio signal generated by the first audio receiver into a digital audio signal and outputs the digital audio signal to the mixer. The analog audio signal generated by the second audio receiver is converted into a digital audio signal. And a second audio signal processor output to the mixer.

The first and second audio signal processing units may perform digital conversion on the analog audio signal generated by the first audio receiver based on the number of microphones included in the first audio receiver. The audio signal processor may perform digital conversion on the analog audio signal generated by the second audio receiver based on the number of microphones.

And a controller for controlling one of the first audio signal processor and the second audio signal processor to operate according to a user's command.

Meanwhile, the stereophonic sound recording method includes generating a video signal through imaging, receiving audio from a first direction, generating audio signals by receiving audio from a second direction, and receiving audio from a third direction. Generating an audio signal by receiving audio from a fourth direction, generating an audio signal based on the generated audio signals, and recording the generated video signal and the generated audio signal Characterized in that it comprises a.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 is a block diagram schematically showing a photographing apparatus capable of stereo sound recording according to an embodiment of the present invention.

Referring to FIG. 1, a photographing apparatus according to an exemplary embodiment of the present invention includes an operation unit 100, an imaging unit 102, a video signal processor 104, a video output unit 106, a first audio receiver 108, The first microphone 110, the second microphone 112, the second audio receiver 114, the third microphone 116, the fourth microphone 118, the first audio signal processor 120, the second audio signal processor And a mixing unit 124, a codec 126, a recording unit 128, an audio output unit 130, and a control unit 132.

The operation unit 100 includes buttons for generating an input signal according to a user's command. When a button is selected by a user's manipulation, the manipulation unit 100 generates an input signal corresponding to the selected button and transmits the input signal to the controller 132 which will be described later.

The imaging unit 102 receives light reflected from a subject through a lens, forms an image on a photosensitive surface, generates an analog video signal, and transmits the analog video signal to the video signal processing unit 104.

The video signal processing unit 104 converts the analog video signal received from the image capturing unit 102 into a digital video signal and provides it to the codec 126 which will be described later. The video signal processor 104 converts the digital video signal received from the codec 126 into an analog video signal and provides the same to the video output unit 106 to be described later.

The video output unit 106 transmits the analog video signal received from the video signal processing unit 104 to an internal or external video output device for output.

The first audio receiver 108 receives audio from the first direction through the first microphone 110 and receives audio from the second direction through the second microphone 112 to generate an analog audio signal to be described later. 1 is provided to the audio signal processor 120.

The first microphone 110 is directed toward the left side of the front in the photographing apparatus, and generates an analog audio signal having a continuous voltage difference from external sound waves.

The second microphone 112 is directed toward the right side of the front of the photographing apparatus, and generates an analog audio signal having a continuous voltage difference from external sound waves.

The second audio receiver 114 receives the audio from the third direction through the third microphone 116 and receives the audio from the fourth direction through the fourth microphone 118 to generate an analog audio signal to be described later. 2 to the audio signal processor 122.

The third microphone 116 is directed toward the left side of the rear side in the photographing apparatus, and generates an analog audio signal having a continuous voltage difference from external sound waves.

The fourth microphone 118 is directed toward the rear right side of the photographing apparatus, and generates an analog audio signal having a continuous voltage difference from external sound waves.

The first audio signal processor 120 converts the analog audio signal received from the first audio receiver 108 into a digital audio signal and provides it to the mixing unit 124 which will be described later. In addition, the first audio signal processor 120 converts the digital audio signal transmitted from the mixer 126 into an analog audio signal and provides it to the audio output unit 130 to be described later.

The second audio signal processor 122 converts the analog audio signal received from the second audio receiver 114 into a digital audio signal and provides it to the mixing unit 124 which will be described later. In addition, the second audio signal processor 122 converts the digital audio signal received from the mixer 126 into an analog audio signal and provides it to the audio output unit 130 to be described later.

In particular, the first audio signal processor 120 and the second audio signal processor 122 perform a digital conversion on the analog audio signal based on the number of microphones included.

In more detail, in the case of the photographing apparatus including the existing first audio input unit 108, the sound wave input from the front left and right is processed and received. However, the recording apparatus including the first audio input unit 108 and the second audio input unit 114 has twice as much audio recording space as the conventional recording apparatus when recording by processing sound waves input from the front left and right and rear left and right. in need. In the process of converting an analog audio signal input through each input unit into a digital audio signal through each audio signal processing unit, the digital signal is decoded to half of the existing capacity and transmitted from each audio signal processing unit by the mixing unit 124 to be described later. By combining the audio signals into one, the digital audio signals transmitted to the codec 126 to be described later can be processed through the same process as the existing digital audio signals.

For example, in the case of a photographing apparatus including only the first audio input unit 108, when the first audio signal processor 120 decodes the analog audio signal received by processing sound waves input from the left and right sides of the front, the 16-bit PCM digital audio signal is generated. Generated and recorded. On the other hand, in the photographing apparatus further including the second audio input unit 114, each audio signal processing unit decodes each analog audio signal into an 8-bit PCM digital audio signal.

In the above decoding process, the existing 16Bit PCM digital audio signal is a PCM signal sampled at 48KHz and quantized at 16Bit. On the other hand, by sampling the above analog signal at 32KHz and quantizing to 12Bit, an 8Bit PCM digital audio signal, which is half of the existing 16Bit PCM digital audio signal, can be generated. Thus, the audio signal processor generates 8Bit PCM digital audio signals in front and rear, and provides them in the mixing unit 124 to be described later. The mixing unit 124 combines the 8-bit PCM digital audio signals received from each audio signal processing unit into one, and provides the 16-bit PCM digital audio signal to the codec 126 which will be described later.

 By changing the sampling frequency and quantization bit as described above, the recording capacity is reduced, but the analog audio signal of the original sound cannot be decoded faithfully. However, in the user's sound quality satisfaction level, if the sampling frequency and the quantization bit is above a certain level, the difference is not felt. In this regard, a PCM signal sampled at 48KHz and quantized at 16Bit or a PCM signal sampled at 32KHz and quantized at 12Bit is half the signal capacity, but feels similar at the user's level of sound quality.

The mixing unit 124 combines the digital audio signals received from the first audio signal processing unit 120 and the second audio signal processing unit 122 into one and provides them to the codec 126 which will be described later. The mixer 124 separates the digital audio signal transmitted from the codec 126 and transmits the digital audio signal to each audio signal processor 120 or 122.

The codec 126 receives the digital video signal from the video signal processing unit 104 and the digital audio signal from the mixing unit 124 and provides the combined digital data to the recording unit 128 to be described later. The codec 126 divides the digital data received from the recording unit 128 to be described later into a digital video signal and a digital audio signal, and provides them to the video signal processing unit 104 and the mixing unit 124.

The recorder 128 records the digital data received from the codec 126 on a recording medium or reproduces the recorded digital data and provides the digital data to the codec 126. Here, the recording medium may be a magnetic tape / disk, an optical disk and a memory.

The audio output unit 130 transmits the analog audio signal received from each audio signal processor 120 or 122 to an internal or external audio output device for output.

The controller 132 controls the overall operation of the photographing apparatus according to a user command input through the manipulation unit 100 using a control program. In particular, the controller 132 changes the sampling frequency and the quantization bit for decoding the analog audio signal in each of the audio signal processing units 120 and 122 based on the number of microphones of the audio signal input units 108 and 114. In addition, the controller 132 controls the output of the front and rear audio signals according to a user command through the operation unit 100, and determines the sampling frequency and the quantization bit of each audio signal processor 120 or 122 accordingly.

Hereinafter, a three-dimensional sound recording method process through the recording apparatus capable of recording three-dimensional sound shown in Figure 1 will be described in detail with reference to FIG.

2 is a flowchart provided to explain a stereophonic sound recording method according to an embodiment of the present invention.

Referring to FIG. 2, first, video and audio are received through the imaging unit 102 and audio receivers 108 and 114 to generate analog video and analog audio signals (S200).

In addition, the analog video signal received in step S200 is converted into a digital video signal through the video signal processing unit 104, and the received analog audio signal through each audio signal processing unit (120, 122) for each audio receiver (108, 114) Based on the number of microphones included in the) is converted into a digital audio signal (S220).

In operation S220, the digital audio signals changed through the audio signal processing units 120 and 122 are combined into one digital audio signal (S240).

In operation S260, the digital video signal converted in step S220 and the digital audio signal combined in step S240 are combined and recorded.

Through the above process, the configuration of the digital audio signal in the recording device including two microphones and the digital audio signal in the recording device including four microphones as shown in Figures 3a and 3b.

3A and 3B are diagrams provided for explaining a stereoscopic sound recording method according to an embodiment of the present invention.

FIG. 3A is a 16-bit PCM digital audio signal sampled at 48 KHz and quantized at 16 bits in front and left analog audio signals. 3B is a digital audio signal generated by combining an 8-Bit PCM digital audio signal, which is a half of a 16-Bit PCM digital audio signal by sampling the front, right and rear analog audio signals at 32 KHz and quantizing each at 12 bit.

As described above, according to the present invention, by performing PCM signal decoding based on the number of microphones in order to record the sound of four channels in the conventional sound recording through two channels, a separate format change and a change in the recorded capacity Stereo sound can be recorded without

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

Claims (5)

An imaging unit which generates a video signal through imaging; A first audio receiver configured to receive audio from a first direction through a first microphone and to receive audio from a second direction through a second microphone to generate an audio signal; A second audio receiver configured to receive audio from a third direction through a third microphone, and generate audio signals by receiving audio from a fourth direction through a fourth microphone; A mixing unit configured to generate one audio signal based on the audio signals output from the first audio receiver and the audio signals output from the second audio receiver; And And a recording unit for recording the video signal generated by the image pickup unit and the audio signal generated by the mixing unit. The method of claim 1, A first audio signal processor converting the analog audio signal generated by the first audio receiver into a digital audio signal and outputting the digital audio signal to the mixer; And And a second audio signal processor converting the analog audio signal generated by the second audio receiver into a digital audio signal and outputting the digital audio signal to the mixer. 3. The method of claim 2, The first audio signal processor, Performing digital conversion on the analog audio signal generated by the first audio receiver based on the number of microphones included in the first audio receiver; The second audio signal processor, And a digital conversion of the analog audio signal generated by the second audio receiver based on the number of microphones included in the second audio receiver. The method of claim 3, And a controller for controlling one of the first audio signal processor and the second audio signal processor to operate according to a user's command. Generating a video signal through imaging; Receiving audio from a first direction and generating audio from the second direction to generate a first audio signal; Receiving audio from a third direction, and receiving audio from the fourth direction to generate a second audio signal; Generating one audio signal based on the generated first audio signal and the generated second audio signal; And Recording the generated video signal and the generated one audio signal; stereo sound recording method comprising a.

Images