WO2005117276A1 - 受信装置 - Google Patents
受信装置 Download PDFInfo
- Publication number
- WO2005117276A1 WO2005117276A1 PCT/JP2005/009095 JP2005009095W WO2005117276A1 WO 2005117276 A1 WO2005117276 A1 WO 2005117276A1 JP 2005009095 W JP2005009095 W JP 2005009095W WO 2005117276 A1 WO2005117276 A1 WO 2005117276A1
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- WO
- WIPO (PCT)
- Prior art keywords
- signal
- recording
- reception state
- state detection
- unit
- Prior art date
Links
- 238000001514 detection method Methods 0.000 claims abstract description 141
- 230000009467 reduction Effects 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 description 18
- 230000005236 sound signal Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
- G11B31/003—Arrangements for the associated working of recording or reproducing apparatus with related apparatus with radio receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/911—Television signal processing therefor for the suppression of noise
Definitions
- the present invention relates to a receiving device for receiving broadcast waves, and more particularly, to a receiving device including a recording / reproducing device for recording and reproducing a broadcast.
- the receiving apparatus includes a tuner (1) that receives a radio broadcast and outputs an audio signal, and converts the audio signal into predetermined encoded data.
- the receiving device is provided with a radio field intensity detecting device (41) for detecting a radio field intensity.
- a radio field intensity detecting device (41) for detecting a radio field intensity.
- Patent Document 1 JP 2001-250368 A
- the conventional receiving device disclosed in the above publication includes a radio wave intensity detecting device (41) for switching a receiving channel for receiving an audio signal having a good radio wave condition.
- the audio signal received by tuner (1) is Data is recorded in the storage device (6), and the encoded data is read out from the storage device (6) later, converted into the original audio signal as it is, and reproduced.
- the user does not always specify only the reception channel with good radio wave condition, so that an audio signal containing noise is recorded in the storage device (6), and the user later inputs the audio signal.
- noise is also reproduced, and as a result, there is a problem in that annoying radio broadcasts containing noise are heard.
- a receiving device mounted on a mobile body such as an automobile inevitably receives a broadcast wave affected by multipath fading ⁇ adjacent interference, so that an audio signal is If the audio signal is recorded in the storage device (6) and reproduced, a problem that unpleasant noise is reproduced is caused.
- the present invention has been made in view of such a conventional problem, and has a recording and reproducing unit that records and reproduces a broadcast, and can reproduce a high-quality broadcast with suppressed noise. It is an object of the present invention to provide a receiving device.
- the invention according to claim 1 is a receiving apparatus having a recording / reproducing means for recording and reproducing a received broadcast, wherein the receiving means receives a broadcast wave and generates a reproduced signal, and the receiving means A reception state detection unit that generates a reception state detection signal indicating a reception state based on an internal signal generated in the storage unit; a recording / reproduction unit that records the reception state detection signal and the reproduction signal in association with each other as a recording signal; A noise reduction unit for supplying the recording signal recorded in the recording / reproducing unit and removing a noise component included in the recording signal and mixed into the reproduction signal based on the reception state detection signal; It is characterized by having.
- the invention according to claim 6 is a recording / reproducing method of a receiving apparatus having recording / reproducing means for recording and reproducing a received broadcast, wherein the receiving step includes receiving a broadcast wave and generating a reproduced signal.
- a receiving state detecting step of generating a receiving state detecting signal indicating a receiving state based on the internal signal generated in the receiving step; and recording the receiving state detecting signal and the reproduction signal in association with each other.
- a noise reduction step of removing a noise component included in the output recording signal and mixed in the reproduction signal based on the reception state detection signal. Description
- FIG. 1 is a block diagram showing a configuration of a receiving device according to an embodiment of the present invention.
- FIG. 2 is a block diagram illustrating a configuration of a receiving apparatus according to an embodiment.
- FIG. 3 is a diagram for explaining functions and operations of the receiving device shown in FIG. 2.
- FIG. 4 is a block diagram showing a configuration of a receiving apparatus according to still another embodiment.
- FIG. 5 is a block diagram illustrating a configuration of a receiving apparatus according to still another embodiment.
- FIG. 6 is a view for explaining functions and operations of the receiving apparatus shown in FIG. 5.
- FIG. 1 is a block diagram illustrating a configuration of a receiving device according to the present embodiment.
- the receiving apparatus 1 includes a tuner section 2 as a receiving means to which an antenna ANT for receiving broadcast waves is connected, a reception state detecting section 3, a writing section 4, a recording / reproducing apparatus 5, , A reading unit 6, a noise reduction unit 7, and a control unit 8.
- the control unit 8 controls the operation of the receiving device 1 according to a user's instruction input via an operation unit (not shown).
- the tuner unit 2 tunes and receives a broadcast wave of a broadcast station selected by a user, performs detection, and the like, thereby performing a reproduction signal as a so-called detection output or demodulation output.
- the tuner unit 2 is a tuner for receiving a radio broadcast
- the tuner unit 2 outputs an audio signal in an audible frequency band generated by detection or the like as a reproduction signal Sau, and further outputs a 2-channel stereo signal.
- the tuner unit 2 When receiving a broadcast or a multi-channel broadcast of two or more channels, it outputs the playback signal Sau separated into channels for each channel.
- the tuner unit 2 is a tuner that receives a broadcast having video and audio information such as a television broadcast, the audio signal in the audible frequency band generated by detection or the like is used.
- the signal is output as a playback signal Sau.
- a playback signal Sau When a 2-channel stereo broadcast or a multi-channel broadcast of 2 or more channels is received, a playback signal Sau separated into channels for each channel is output.
- the reception state detection unit 3 detects a reception state based on an internal signal such as an intermediate frequency signal (IF signal) generated during reception by the tuner unit 2, and a reception state detection signal Snz indicating the detected reception state. Is output.
- IF signal intermediate frequency signal
- the reception state detection unit 3 detects a reception state based on a change in the level of a noise component mixed in a detection signal output from a detector provided in the tuner unit 2. Also, the reception state is detected based on the level change of the noise component mixed in the S-meter signal indicating the electric field strength output from the intermediate frequency amplifier provided in the tuner unit 2, and The reception sensitivity is detected based on the level change of the DC component of the S meter, and the reception state is detected based on the detected reception sensitivity.
- the receiving state when the receiving state is detected based on the receiving sensitivity, the receiving state is better when the level of the DC component of the S meter is higher, and the receiving state is better when the level is lower. It outputs a reception state detection signal Snz indicating that there is no such signal.
- the writing unit 4 When the writing control signal WRITE is supplied from the control unit 8, the writing unit 4 generates a recording signal Sw by temporally associating the reproduction signal S au with the reception state detection signal Snz, and Record on raw device 5.
- the writing unit 4 synchronizes the reproduction signal Sau and the reception state detection signal Snz with the reception time so as to prevent a time shift between the reproduction signal Sau and the reception state detection signal Snz.
- the recording / reproducing apparatus 5 records the reproduction signal Sau and the reception state detection signal Snz that have been subjected to the synchronization adjustment as the recording signal Sw.
- the writing unit 4 adds an identification signal to the beginning of the recording signal Sw, and when a control signal indicating the end of recording is supplied from the control unit 8, the recording signal Sw is added to the end of the recording signal Sw. An end signal indicating the end position of Sw is added and output.
- the control unit 8 manages the time to which the identification signal and the end signal are added (hereinafter, referred to as "addition time"), so that the range of the recording signal Sw can be identified. I have. Further, the control unit 8 displays the information of the additional time on a liquid crystal display or the like provided in an operation unit (not shown), so that the broadcast recorded on the recording / reproducing device 5 is presented to the user. It's like that.
- the recording / reproducing device 5 records the recording signal Sw supplied from the write unit 4.
- the recording / reproducing device 5 outputs the already recorded record signal Sw as the read signal Sr.
- control unit 8 specifies the identification signal added to the already recorded recording signal Sw (hereinafter, the already recorded “recording signal Sw” is referred to as “read signal Sr”). Then, when the read control signal READ is output, the recording / reproducing device 5 outputs the read signal Sr to which the specified identification signal is added.
- the recording / reproducing device 5 transmits the read signal Sr while recording the record signal Sw supplied from the write unit 4. Output.
- the control unit 8 designates an identification signal which is already recorded and added to the read signal Sr and outputs a write control signal WRITE and a read control signal READ
- the recording / reproducing apparatus 5 outputs the read signal Sr specified by the identification signal while recording the recording signal Sw supplied from the writing unit 4 during reception. Therefore, it is possible for the user to output the read signal Sr of another previously recorded broadcast while recording the broadcast being received on the recording / reproducing device 5.
- the recording / reproducing apparatus 5 When the control unit 8 outputs a write control signal WRITE and a read control signal READ without specifying an identification signal, the recording / reproducing apparatus 5 outputs the recording signal supplied from the writing unit 4 during reception. While recording Sw, the so-called simultaneous reading of the recording signal Sw is performed and the read signal Sr is output. Accordingly, the user can simultaneously output the read signal Sr of the broadcast while recording the broadcast being received on the recording / reproducing device 5.
- the reading unit 6 is supplied from the recording / reproducing device 5 in accordance with the instruction of the read control signal READ.
- the read signal Sr to be read is input, and the reproduction signal Sau included in the read signal Sr and the reception state detection signal Snz are separated on the time axis in synchronization with each other, and the separated reproduction signal Sau (hereinafter, the separated The reproduced signal Sau is represented by a symbol Saur) and the separated reception state detection signal Snz (hereinafter, the reception state detection signal Snz after separation is represented by a code Snzr) is supplied to the noise reduction unit 7.
- the noise reduction unit 7 removes the noise component mixed in the reproduction signal Saur in synchronization with the change in the reception state detection signal Snzr, thereby generating the output reproduction signal So in which noise has been reduced (suppressed). Generate and supply to speakers and the like.
- the noise reduction unit 7 has a high-frequency cut-off frequency fu at the upper limit of the audible frequency band, and changes the high-frequency cut-off frequency fu to a lower frequency in accordance with a change in the reception state detection signal Snzr. , And is formed by a variable low-pass filter.
- the noise reduction unit 7 sets the high-frequency cutoff frequency fu determined as the default value, and further sets the reception state.
- the reception state detection signal Snzr which indicates that the signal is not good, is supplied, the high-frequency cutoff frequency is changed to a lower frequency side in accordance with the reception state detection signal Snzr, so that the noise component mixed in the reproduction signal Saur Is removed.
- the tuner unit 2 When the user instructs the control unit 8 to start receiving, the tuner unit 2 starts receiving operation under the control of the control unit 8, and when the user specifies a desired broadcast station, the control unit 8 By instructing the tuner unit 2 to tune the tuning frequency (local oscillation frequency) corresponding to the designated broadcast station, the tuner unit 2 tunes to the broadcast wave of the designated broadcast station.
- the tuning frequency local oscillation frequency
- the control unit 8 When the user instructs the recording / reproducing device 5 to record a broadcast while the tuner unit 2 is performing the receiving operation, the control unit 8 writes the data into the writing unit 4 and the recording / reproducing device 5.
- the control signal WRITE is supplied, and the writing unit 4 and the recording / reproducing device 5 start the recording operation.
- the tuner unit 2 performs tuning and detection, etc., and outputs a reproduction signal Sau
- the reception state detection unit 3 outputs a reception state detection signal Snz
- the writing unit 4 receives the reproduction signal Sau.
- a recording signal Sw synchronized with the state detection signal Snz is generated and recorded on the recording / reproducing device 5. Let me go.
- a control signal indicating the end of recording is output from the control unit 8 and the write control signal WRITE is not output, so that the writing unit 4 and the recording / reproducing device 5 are not output. Ends the recording operation.
- the recording / reproducing apparatus 5 transmits the received broadcast to the recording signal Sw including the reproduction signal Sau and the reception state detection signal Snz. Record as
- the control unit 8 transmits the desired broadcast to the recording / reproducing device 5.
- the specified additional time and the read control signal READ are supplied to the reading unit 6, and the recording / reproducing device 5 and the reading unit 6 start a reproducing operation.
- the recording / reproducing device 5 outputs the read signal Sr specified by the additional time, and the reading unit 6 outputs the read signal Sr in synchronization with the reproduction signal Saur and the reception state detection signal Snzr. Further, the noise reduction unit 7 removes noise components mixed in the reproduction signal Saur in accordance with the change in the reception state detection signal Snzr, and outputs an output reproduction signal S0 in which noise is suppressed. Supply to speakers and the like.
- the control unit 8 When the recording / reproducing device 5 finishes outputting the read signal Sr relating to the broadcast designated by the user, the control unit 8 outputs a control signal indicating the end of recording and outputs a write control signal WRITE. Then, the writing unit 4 and the recording / reproducing device 5 end the recording operation.
- the control signal indicating the end of recording is output from the control unit 8 and the write control is performed.
- the signal WRITE is no longer output, and the writing unit 4 and the recording / reproducing device 5 end the recording operation.
- the recording / reproducing device 5 when the user instructs the ⁇ reproduction operation>, the recording / reproducing device 5 outputs the read signal Sr that has already been recorded, so that the previously recorded broadcast can be reproduced. It is possible to regenerate. [0047] Further, the recording / reproducing device 5 outputs a read signal Sr composed of the reception state detection signal Snzr and the reproduction signal Saur, and the noise reduction unit 7 generates a reproduction signal based on the reception state detection signal Snzr.
- the control unit 8 writes the write control signal WRITE. Is supplied to the writing unit 4 and the recording / reproducing device 5, and the additional time and the read control signal READ are supplied to the recording / reproducing device 5 and the reading unit 6.
- the recording section 4 records the broadcast being received by the recording / reproducing apparatus 5 as the recording signal Sw
- the recording / reproducing apparatus 5 transmits the already recorded read signal specified by the additional time.
- Sr is output via the reading unit 6, and the noise reduction unit 7 generates and outputs an output reproduction signal So in which noise is suppressed.
- the noise reduction unit 7 removes noise components in the reproduction signal Saur based on the reception state detection signal Snzr, so that high-quality sound with reduced noise is reproduced by a speaker or the like. It is possible to provide
- the control unit 8 supplies the write control signal WRITE to the writing unit 4 and the recording / reproduction device 5 and reads the data.
- the control signal READ is supplied to the recording / reproducing device 5 and the reading unit 6. That is, the additional time is not supplied from the control unit 8 to the recording / reproducing device 5.
- the recording / reproducing apparatus 5 to simultaneously read the recording signal Sw while recording the broadcast being received by the writing unit 4 as the recording signal Sw in the recording / reproducing apparatus 5.
- the read signal Sr is output through the reading unit 6, and the noise reduction unit 7 generates and outputs an output reproduction signal So in which noise is suppressed.
- the broadcast receiving signal is output simultaneously while recording the broadcast being received on the recording / playback device 5. It is possible. Further, the noise reduction unit 7 removes noise components in the front and rear reproduction signals Saur based on the reception state detection signal Snzr, so that high-quality sound with reduced noise is reproduced by a speaker or the like and provided to the user. can do.
- the receiving apparatus 1 of the present embodiment when recording a broadcast being received on the recording / reproducing apparatus 5, the receiving state detection signal Snz indicating the reception state and the reproduction signal Sau are used to record the broadcast.
- the received signal detection signal Snzr included in the read signal Sr is used to reproduce the broadcast signal Saur. Since the mixed noise components are removed, it is possible to provide users with high-quality broadcasting with suppressed noise.
- the broadcast is re-used by using the reception state detection signal Snzr included in the read signal Sr. Since the noise component mixed with the raw signal Saur is removed, it is possible to reproduce high-quality broadcasting according to the general usage form of the user.
- the receiving apparatus 1 of the present embodiment is mounted on a mobile object such as an automobile, and inevitably receives broadcast waves in an environment affected by multipath fusing ⁇ adjacent interference or the like, and records and reproduces the broadcast waves. Even when recording to a high-quality broadcast, it uses the reception status detection signal Snzr included in the read signal Sr to remove noise components mixed into the playback signal Saur during playback. It is possible to provide to the person.
- FIG. 1 a more specific example of the embodiment shown in FIG. 1 will be described with reference to FIGS. 2 and 3.
- FIG. 2 is a block diagram showing the configuration of the receiving apparatus 1 according to the present embodiment, and the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals.
- FIG. 3 is a diagram for explaining the operation of the receiving device 1.
- this receiving apparatus 1 includes a tuner section 2 as a receiving means to which an antenna ANT for receiving broadcast waves is connected, a reception state detecting section 3, a writing section 4, a recording / reproducing apparatus 5
- control unit 8 is formed of a circuit including a microprocessor (MPU) or the like having an arithmetic control function, and receives signals from the user via the operation unit 10 according to an instruction from the user. Centrally control the operation of 1.
- MPU microprocessor
- Tuner unit 2 is a high-frequency signal output from receiving antenna ANT for receiving broadcast waves.
- the device 2d is configured to include a separation circuit 2e that separates a channel of the detection signal into audio signals of each channel, and outputs a reproduction signal Sau as a bundle of audio signals of each channel.
- the detection signal Sdet is supplied to the reception state detection unit 3, and the reproduction signal Sau is supplied to the writing unit 4.
- the reception state detection unit 3 generates a reception state detection signal Snz from a high-pass filter 3a that inputs the detection signal Sdet, an amplification circuit 3b that amplifies the output of the high-pass filter 3a, and an output of the amplification circuit 3b. It is composed of a rectifier circuit 3c.
- the high-pass filter 3a has a low-frequency cutoff frequency fd adjusted to the upper limit of the frequency band of the detection signal Sdet output from the detector 2d in a good reception state.
- a noise component having a frequency higher than the low-frequency cutoff frequency fd mixed in the signal Sdet is extracted and output, amplified by the amplifier circuit 3d, and supplied to the rectifier circuit 3c.
- the rectifier circuit 3 d rectifies (smooths) the absolute value of the noise component to generate and output a reception state detection signal Snz indicating a change in amplitude as a change in reception state.
- the writing section 4 converts the reproduction signal Sau and the reception state detection signal Snz into digital It has an AZD transformation (not shown) to convert and input, and adjusts the digital data so that there is no time lag by synchronizing with the reception time so that the reproduction signal Sau and the reception state detection signal Snz
- the recording signal Sw is also supplied to the recording / reproducing device 5.
- the writing unit 4 adds an identification signal composed of digital data and an end signal to the recording signal Sw and supplies the recording signal Sw to the recording / reproducing device 5 as in the above-described embodiment. By managing each time (additional time) when the end signal and the end signal are added, the range of the recording signal Sw can be identified. Further, the control unit 8 displays the information of the additional time on a liquid crystal display or the like provided in the operation unit 10 so as to present the broadcast recorded on the recording / reproducing device 5 to the user.
- the recording / reproducing device 5 records the recording signal Sw on a rewritable storage medium such as a hard disk, a DVD, a CD, and a semiconductor memory, and outputs the recording signal Sw as a reading signal Sr.
- a rewritable storage medium such as a hard disk, a DVD, a CD, and a semiconductor memory
- the reading unit 6 synchronizes and separates the read signal Sr output from the recording / reproducing device 5 which also has digital data power into a reproduced signal Saur and a reception state detection signal Snzr which are each composed of digital data, and converts the read signal Sr into a DZA transform (not shown). The signal is converted into an analog reproduction signal Saur and reception state detection signal Snzr, and output.
- the noise reduction unit 7 includes a variable low-pass filter 7a that inputs the reproduction signal Saur, and a frequency control unit 7b that inputs the reception state detection signal Snzr.
- variable low-noise filter 7a has a high-frequency cutoff frequency fu at the upper limit of the audible frequency band, and according to an instruction of the frequency adjustment control signal CNT supplied from the frequency control unit 7b, Changes the high frequency cutoff frequency fu.
- Frequency control section 7b outputs frequency adjustment control signal CNT for changing high-frequency cutoff frequency fu in accordance with the amplitude change of reception state detection signal Snzr.
- the frequency control unit 7b associates the amplitude of the reception state detection signal S nzr with the high-frequency cutoff frequency fu.
- a memory that stores data in a table format is provided, and the high-frequency cutoff frequency fu is determined by searching data in the memory based on the amplitude of the reception state detection signal Snzr. Then, as exemplified in FIG.
- the frequency control unit 7b determines that the larger the amplitude of the reception state detection signal Snzr, the poorer the reception state, and determines that the high-frequency cutoff of the variable low-pass filter 7a
- the frequency adjustment control signal CNT for changing the frequency fu to the lower frequency side is output.
- a frequency adjustment control signal CNT for changing the off frequency fu to the higher frequency side is output.
- the user similarly to the receiving apparatus 1 of the embodiment (see FIG. 1), the user operates the operation unit 10 so that the ⁇ recording operation>, the ⁇ reproducing operation>, and the ⁇ recording Live simultaneous operation> can be specified as appropriate. Therefore, the operation will be described for each usage mode of the user.
- the control unit 8 supplies the writing control signal WRITE to the writing unit 4 and the recording / reproducing device 5, and the writing unit 4
- the recording / reproducing device 5 starts the recording operation.
- the tuner unit 2 performs tuning and detection, etc., and outputs a reproduction signal Sau
- the reception state detection unit 3 outputs a reception state detection signal Snz
- the writing unit 4 detects the reproduction signal Sau and the reception state.
- a recording signal Sw synchronized with the signal Snz is generated and recorded on the recording / reproducing device 5.
- the reception state detection 3 is such that the detection signal Sdet output from the detector 2d is passed through a no-pass filter 3a, so that the noise component mixed into the detection signal Sdet according to the reception state Then, the rectifier circuit 3c rectifies the absolute value of the noise component amplified by the amplifier circuit 3b, so that, for example, as shown in FIG. A reception state detection signal Snz is generated and output.
- the writing unit 4 receives the reproduction signal Sau and the reception state detection signal Snz, which are output from the separation circuit 2e and mixed with noise components, for example, as schematically shown in FIG. Time A recording signal Sw is generated in synchronism therewith and recorded by the recording / reproducing device 5.
- control unit 8 when the user instructs the end of recording, the control unit 8 outputs a control signal indicating the end of recording, and the write control signal WRITE is not output, so that the writing unit 4 and the recording / reproducing device 5 Ends the recording operation.
- the control unit 8 sends the designated reproduction time to the recording / reproducing device 5 and the reading unit 6.
- the added time and the read control signal READ are supplied, and the recording / reproducing device 5 and the reading unit 6 start the reproducing operation.
- the recording / reproducing device 5 outputs the read signal Sr specified by the additional time, and the reading unit 6 outputs the read signal Sr in synchronization with the reproduction signal Saur and the reception state detection signal Snzr. Further, the frequency control unit 7b of the noise reduction unit 7 controls the high-frequency cutoff frequency fu of the variable low-pass filter 7a according to the change of the reception state detection signal Snzr, so that the noise component mixed into the reproduction signal Saur And the output reproduction signal So with reduced noise is supplied to a speaker or the like.
- the control unit 7b adjusts and controls the high-frequency cutoff frequency fu of the variable low-pass filter 7a in accordance with the change in the amplitude of the reception state detection signal Snzr, so that, for example, as shown in FIG. Outputs the output reproduction signal So from which noise components mixed in Sau have been removed, and outputs high-quality sound, such as speed.
- the control signal from the control unit 8 indicates the end of recording. Is output and the write control signal WRITE is not output, and the writing unit 4 and the recording / reproducing device 5 end the recording operation.
- the user when the user instructs the ⁇ playback operation>, the user records the previously recorded broadcast based on the read signal Sr recorded on the recording / reproducing device 5 based on the read signal Sr.
- the noise can be reproduced by the noise reduction unit 7 based on the reception state detection signal Snzr. Since the noise component in the Saur is removed, high-quality sound with reduced noise can be reproduced with a speaker or the like and provided to the user.
- control unit 8 supplies the write control signal WRITE to the writing unit 4 and the recording / reproducing device 5 while simultaneously The time and the read control signal READ are supplied to the recording / reproducing device 5 and the reading unit 6.
- the recording / reproducing apparatus 5 transmits the already-recorded read signal specified by the additional time.
- Sr is output via the reading unit 6, and the variable low-pass filter 7a and the frequency control unit 7b of the noise reduction unit 7 change the reception state detection signal Saur by extracting noise components mixed in the reproduction signal Saur. In this way, the output reproduction signal So with reduced noise is supplied to the speed, etc.
- the noise reduction unit 7 removes noise components in the reproduction signal Saur based on the reception state detection signal Snzr, so that high-quality sound with reduced noise is reproduced by a speaker or the like and used. It is possible to provide to people.
- the reception state detection unit 3 extracts the noise component mixed in the detection signal Sdet and detects the reception state. Since the writing unit 4 generates the recording signal Sw in which the reception state detection signal Snz and the reproduction signal Sau are synchronized with the reception time and records the recording signal Sw in the recording / reproduction device 5, Even when the user performs reproduction based on the recorded signal Sw of the broadcast recorded later, the noise reduction unit 7 generates the reproduced signal for output So in which noise is suppressed, and outputs high-quality sound to the speaker. It can be played back and provided to users.
- control unit 8 performs the writing without outputting the additional time.
- the control signal WRITE is supplied to the writing unit 4 and the recording / reproducing device 5, and the read control signal READ is supplied to the recording / reproducing device 5 and the reading unit 6.
- the recording / reproducing device 5 While recording the broadcast being received by the writing unit 4 as the recording signal Sw in the recording / reproducing device 5, the recording / reproducing device 5 reads the recording signal Sw by reading the recording signal Sw simultaneously.
- the signal is output as the signal Sr via the reading unit 6, and the noise reduction unit 7 generates and outputs an output reproduction signal So in which noise is suppressed.
- the broadcast signal being received is simultaneously output while recording the broadcast being received on the recording and playback device 5. Can be.
- recording / reproducing apparatus 5 When recording / reproducing apparatus 5 records a broadcast being received as recording signal Sw, it also records the reception state detection signal Snz generated by reception state detection section 3 and records the same simultaneously. Then, the recorded recording signal Sw is output as the read signal Sr, so that the noise reduction unit 7 removes the noise component in the reproduction signal Saur based on the reception state detection signal Snzr, and the noise is suppressed. High quality sound can be reproduced by a speaker or the like and provided to the user.
- the receiving apparatus 1 of the present embodiment when recording a broadcast being received in the recording / reproducing apparatus 5, the reception generated based on the noise component included in the detection signal Sdet. It is recorded as a recording signal Sw composed of a reception state detection signal Snz indicating the state and a reproduction signal Sau, and when reproducing the broadcast recorded on the recording / reproduction device 5, the read signal Sr Since the noise component is removed from the reproduction signal Saur by using the reception state detection signal Snzr included in the signal, the user is provided with a high-quality broadcast with reduced noise. be able to.
- FIG. 4 is a block diagram showing the configuration of the receiving apparatus 1 of the present embodiment, and the same or corresponding parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.
- the reception state detecting unit 3 is mixed into the detection signal Sdet. While the reception state detection signal Snz is generated based on the noise component, the reception state detection unit 3 provided in the reception apparatus 1 of the present embodiment shown in FIG.
- the noise component mixed in the data signal Sm is extracted by the noise pass filter 3a and amplified by the amplifier circuit 3b, and the rectifier circuit 3c rectifies the absolute value of the amplified noise component, thereby obtaining the noise component. It generates and outputs a reception state detection signal Snz indicating the envelope of the above.
- the high-noise filter 3a provided in the reception state detection unit 3 of the present embodiment has a frequency band of the S meter signal Sm output from the intermediate frequency amplifier 2c in a good reception state. It has a low cut-off frequency fd adjusted to the upper limit.
- the remaining tuner unit 2 writing unit 4, recording / reproducing device 5, reading unit 6, noise reducing unit 7, control unit 8, control circuit 8, and remaining tuner unit 2 provided in the receiving apparatus 1 of the present embodiment.
- the operation unit 9 and the operation unit 10 have the same configurations and functions as those of the reception device 1 shown in FIG.
- the ⁇ recording operation>, the ⁇ reproduction operation>, and the ⁇ Recording / playback simultaneous operation> can be specified as appropriate.
- the tuner unit 2 performs tuning and detection, etc., outputs a reproduced signal Sau, and the reception state detection unit 3 mixes the S meter signal Sm.
- the write unit 4 generates a recording signal Sw in which the reproduction signal S au and the reception state detection signal Snz are synchronized with each other, and the recording / reproducing device 5 Let me record.
- the recording / reproducing apparatus 5 outputs a read signal Sr specified by the additional time, and the reading unit 6 outputs the read signal Sr.
- the frequency control section 7b of the noise reduction section 7 outputs the high cut-off frequency of the variable low-pass filter 7a according to the change of the reception state detection signal Snzr. By controlling fu, a noise component mixed in the reproduction signal Saur is removed, and the output reproduction signal So in which noise is suppressed is supplied to a speaker or the like.
- the writing unit 4 causes the recording / playback device 5 to record the broadcast being received as a recording signal Sw while recording / reproducing.
- the raw device 5 outputs the already recorded read signal Sr specified by the additional time via the read unit 6, and further mixes the variable low-pass filter 7a and the frequency control unit 7b of the noise reduction unit 7 with the reproduced signal Saur. By removing the resulting noise component according to the change of the reception state detection signal Saur, the output reproduction signal So with reduced noise is supplied to a speaker or the like.
- the recording unit 4 records the broadcast being received by the recording / playback device 5 as the recording signal Sw,
- the recording / reproducing device 5 performs the simultaneous reading
- the read signal Sr is output via the reading unit 6, and the variable low-pass filter 7a and the frequency control unit 7b of the noise reduction unit 7 are mixed into the playback signal Saur.
- the output reproduction signal So with reduced noise is supplied to a speaker or the like.
- the receiving apparatus 1 of the present embodiment when recording a broadcast being received in the recording / reproducing apparatus 5, the reception generated based on the noise component mixed in the S meter signal Sm It is recorded as a recording signal Sw composed of a reception state detection signal Snz indicating a state and a reproduction signal Sau, and when reproducing a broadcast recorded on the recording / reproduction device 5, the reception signal included in the read signal Sr By using the state detection signal Snzr to remove noise components mixed in the reproduction signal Saur, it is possible to provide users with high-quality broadcasting with reduced noise.
- FIG. 5 is a block diagram showing the configuration of the receiving device 1 of the present embodiment, and the same or corresponding parts as those in FIGS. 1, 2 and 4 are denoted by the same reference numerals.
- the reception state detecting unit 3 is mixed in the S meter signal Sm. While the reception state detection signal Snz is generated based on the noise component, the reception state detection unit 3 provided in the reception apparatus 1 of the present embodiment shown in FIG. The reception state detection signal Snz is generated by extracting the signal with the filter 3d and amplifying the signal with the amplifier circuit 3e.
- the low-pass filter 3d provided in the reception state detection unit 3 of the present embodiment is an upper limit of the frequency band of the S meter signal Sm output from the intermediate frequency amplifier 2c in a good reception state. Has a high-frequency cut-off frequency fc adjusted to. For this reason, when the reception condition is good, in other words, when the reception sensitivity is high, a signal having a large level is output from the low-pass filter 3d, and the reception state detection signal Snz having a large level is also output from the amplifier circuit 3e.
- the reception condition is not good, in other words, the lower the reception sensitivity, the lower the level of the signal is output from the low-pass filter 3d, and the lower the reception level detection signal Snz from the amplifier circuit 3e. Is done.
- the frequency control unit 7b provided in the noise reduction unit 7 sets the reception state as the amplitude of the reception state detection signal Snzr supplied from the reading unit 6 increases.
- the high-frequency cutoff frequency of the variable low-pass filter 7a is changed to a lower frequency side, and the smaller the amplitude of the reception state detection signal Snzr is, as shown in FIGS.
- the high-frequency cutoff frequency fu of the variable low-pass filter 7a is changed to the high frequency side.
- the frequency control unit 7b of the present embodiment shown in FIG. If the amplitude of the reception condition detection signal Snzr is smaller, the higher the cutoff frequency fu of the variable low-pass filter 7a is, the better the reception condition is.
- the high cut-off frequency fu of the variable low-pass filter 7a It is now changing to the number side.
- the frequency control unit 7b associates the amplitude of the reception state detection signal Snzr with the high-frequency cutoff frequency fu.
- a memory that stores data in a format is provided, and the high-frequency cutoff frequency fu is determined by searching data in the memory based on the amplitude of the reception state detection signal Snzr.
- tuner unit 2 writing unit 4, recording / reproducing device 5, reading unit 6, control unit 8, noise reduction unit 7, output circuit 9 provided in the receiving device 1 of the present embodiment.
- the operating unit 10 has the same configuration and function as the receiving device 1 shown in FIG.
- the user operates the operation unit 10 to perform a recording operation> Operation>
- recording / playback simultaneous operation> can now be specified as appropriate.
- the tuner unit 2 performs tuning and detection, etc., and outputs a reproduced signal Sau, and the reception state detection unit 3 extracts the DC component of the S meter signal Sm. Then, the writing unit 4 generates a recording signal Sw in which the reproduction signal Sau and the reception state detection signal Snz are synchronized, and causes the recording / reproducing device 5 to record the recording signal Sw.
- the recording / reproducing device 5 When the user specifies ⁇ additional time> and ⁇ playback operation>, the recording / reproducing device 5 outputs a read signal Sr specified by the additional time, and the reading unit 6 outputs the read signal Sr.
- the frequency control section 7b of the noise reduction section 7 outputs the high cut-off frequency of the variable low-pass filter 7a according to the change of the reception state detection signal Snzr.
- the writing unit 4 records the broadcast being received as a recording signal Sw in the recording / playback apparatus 5 while recording / reproducing.
- the raw device 5 outputs the already recorded read signal Sr specified by the additional time via the read unit 6, and further mixes the variable low-pass filter 7a and the frequency control unit 7b of the noise reduction unit 7 with the reproduced signal Saur. Noise component according to the change of the reception state detection signal Saur. Then, the output reproduction signal So with suppressed noise is supplied to a speaker or the like.
- the writing unit 4 records the broadcast being received as a recording signal Sw on the recording / playback device 5 while
- the recording / reproducing device 5 performs the simultaneous reading
- the read signal Sr is output via the reading unit 6, and the variable low-pass filter 7a and the frequency control unit 7b of the noise reduction unit 7 are mixed into the playback signal Saur.
- the output reproduction signal So with reduced noise is supplied to a speaker or the like.
- the receiving apparatus 1 of the present embodiment when recording the broadcast being received in the recording / reproducing apparatus 5, the reception indicating the reception state generated based on the DC component of the S meter signal Sm It is recorded as a recording signal Sw composed of the state detection signal Snz and the reproduction signal Sau, and when reproducing the broadcast recorded on the recording / reproducing apparatus 5, the reception state detection signal included in the read signal Sr Since Snzr is used to remove noise components mixed in the reproduction signal Saur, it is possible to provide users with high-quality broadcasting with suppressed noise.
- the receiving device 1 of the embodiment and the example described above is configured to generate the detection signal Sdet, the S meter signal Sm, and the reproduction signal Sau by performing analog signal processing on the received broadcast wave. It may be configured by a digital circuit that performs digital signal processing. In addition, the receiving device 1 of the embodiment and the example can be applied to a receiving device that receives digital broadcasting.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Television Signal Processing For Recording (AREA)
- Noise Elimination (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Circuits Of Receivers In General (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/597,902 US20070218838A1 (en) | 2004-05-31 | 2005-05-18 | Receiver |
JP2006513854A JPWO2005117276A1 (ja) | 2004-05-31 | 2005-05-18 | 受信装置 |
EP05741415A EP1753146A1 (en) | 2004-05-31 | 2005-05-18 | Reception device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004161701 | 2004-05-31 | ||
JP2004-161701 | 2004-05-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005117276A1 true WO2005117276A1 (ja) | 2005-12-08 |
Family
ID=35451217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/009095 WO2005117276A1 (ja) | 2004-05-31 | 2005-05-18 | 受信装置 |
Country Status (4)
Country | Link |
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US (1) | US20070218838A1 (ja) |
EP (1) | EP1753146A1 (ja) |
JP (1) | JPWO2005117276A1 (ja) |
WO (1) | WO2005117276A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014527164A (ja) * | 2011-07-26 | 2014-10-09 | マルティクス エスア | 光子束の分光測定用の処理装置及び方法 |
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JPH05102799A (ja) * | 1991-10-11 | 1993-04-23 | Alpine Electron Inc | Rdsラジオ受信方法 |
JPH06204926A (ja) * | 1992-12-28 | 1994-07-22 | Kenwood Corp | 2チューナダイバシテイrds受信機 |
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JP2004040289A (ja) * | 2002-07-01 | 2004-02-05 | Sharp Corp | 映像信号処理装置及び映像信号記録装置 |
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US3241073A (en) * | 1962-12-21 | 1966-03-15 | Motorola Inc | Impulse noise blanker for am radios |
US4313217A (en) * | 1980-05-05 | 1982-01-26 | Beuscher Donald A | Frequency standard |
EP1094446B1 (en) * | 1999-10-18 | 2006-06-07 | Lucent Technologies Inc. | Voice recording with silence compression and comfort noise generation for digital communication apparatus |
US7136630B2 (en) * | 2000-12-22 | 2006-11-14 | Broadcom Corporation | Methods of recording voice signals in a mobile set |
JP4151243B2 (ja) * | 2001-07-26 | 2008-09-17 | 三菱電機株式会社 | マルチパスノイズ除去方法および除去装置、fm受信機 |
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2005
- 2005-05-18 WO PCT/JP2005/009095 patent/WO2005117276A1/ja not_active Application Discontinuation
- 2005-05-18 EP EP05741415A patent/EP1753146A1/en not_active Withdrawn
- 2005-05-18 JP JP2006513854A patent/JPWO2005117276A1/ja active Pending
- 2005-05-18 US US11/597,902 patent/US20070218838A1/en not_active Abandoned
Patent Citations (7)
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JPH05102799A (ja) * | 1991-10-11 | 1993-04-23 | Alpine Electron Inc | Rdsラジオ受信方法 |
JPH06204926A (ja) * | 1992-12-28 | 1994-07-22 | Kenwood Corp | 2チューナダイバシテイrds受信機 |
JPH07240088A (ja) * | 1994-02-28 | 1995-09-12 | Matsushita Electric Ind Co Ltd | オーディオ装置 |
JPH09167986A (ja) * | 1995-12-18 | 1997-06-24 | Clarion Co Ltd | ダイバーシティ受信装置 |
JPH10200435A (ja) * | 1997-01-09 | 1998-07-31 | Alpine Electron Inc | ラジオ受信機及び自動選局方法 |
JP2002033941A (ja) * | 2000-07-14 | 2002-01-31 | Sony Corp | 信号処理装置及び方法、映像信号記録装置、並びに映像信号再生装置 |
JP2004040289A (ja) * | 2002-07-01 | 2004-02-05 | Sharp Corp | 映像信号処理装置及び映像信号記録装置 |
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JP2014527164A (ja) * | 2011-07-26 | 2014-10-09 | マルティクス エスア | 光子束の分光測定用の処理装置及び方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1753146A1 (en) | 2007-02-14 |
JPWO2005117276A1 (ja) | 2008-07-31 |
US20070218838A1 (en) | 2007-09-20 |
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