JPH08129825A - Video and audio signal recording and reproducing device - Google Patents

Abstract

PURPOSE: To reduce power consumption by stopping a circuit operation at the time of unnecessity and also to allow an output to be supplied for a monitor. CONSTITUTION: At the time of recording, either of two inputs is selected by a changeover means 12, and this is subjected to recording processing by a recording signal processing part 13 to become a recording signal. An output of the changeover means 12 is selected by a changeover means 15, and its D/A- converted output is selected by a changeover means 17 to become an analog output signal. At this time, a reproducing signal processing part 14 is stopped in operation by an operation stopping control signal, so that power consumption can be reduced. At the time of reproducing, a reproducing signal is subjected to reproducing processing by the reproducing signal processing part 14 to become an analog output signal via the changeover means 15, a D/A converter 16 and the changeover means 17. At this time, an A/D converter 11 and the recording signal processing part 13 are brought into the operation stopping state by the operation stopping control signal, so that the power consumption can be reduced. Moreover, the output is allowed to be supplied for the monitor even at the time of reducing the power consumption by providing a channel for outputting the recording signal at the time of recording.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video / audio recording / reproducing apparatus for reducing power consumption by stopping the operation of unnecessary circuits.

[0002]

2. Description of the Related Art A conventional video / audio signal recording / reproducing apparatus is
The signal processing of the input data was performed in all periods.

FIG. 3 is a block diagram of a conventional video / audio signal recording / reproducing apparatus. In FIG. 3, 31 is AD
(Analog / digital) converter, 32 is switching means, 3
3 is a recording signal processing unit, 34 is a reproduction signal processing unit, and 35 is D
It is an A (digital / analog) converter.

The operation of the video / audio signal recording / reproducing apparatus configured as described above will be described below with reference to FIG.

During recording, a digital input signal (either a video signal or an audio signal) or an analog input signal (either a video signal or an audio signal) converted into a digital signal by the AD converter 31 is selected by the switching means 32. The recording signal processing unit 33 performs shuffling for rearranging data from time series to recording series, data compression, addition of error correction code, modulation, etc., and outputs as a recording signal.

At the time of reproduction, the reproduction signal is subjected to demodulation, error correction, data decompression, deshuffling for rearranging the data in time series from the recording series, modification, etc., by the reproduction signal processing unit 34, and is output as a digital signal, and at the same time, DA signal is output. The converter 35 converts the signal into an analog signal and outputs the analog signal.

[0007]

However, in the above video / audio signal recording / reproducing apparatus, the power consumption is not reduced because the input / output signals are constantly processed.

Further, even if the operation of the recording signal processing unit, the reproduction signal processing unit or the like is stopped by some method, there is a problem that the recording signal cannot be monitored.

In view of the above point, the present invention provides an AD converter, a recording signal processing section, a reproduction signal processing section, a DA during an unnecessary period.
The power consumption is reduced by selectively stopping the operation of the converter. Another object is to enable a monitor output even when the power consumption is reduced by providing a path for outputting a recording signal.

[0010]

In order to achieve the above object, the present invention provides an AD converter for converting an analog input signal into a digital signal and stopping the conversion by an operation stop control signal, and the AD converter. A first switching means for switching between an output and a digital input signal; a recording signal processing section for processing a signal output from the first switching means to output a recording signal and stopping signal processing by an operation stop control signal; A reproduction signal processing section for processing a signal and stopping the signal processing by an operation stop control signal; a second switching means for switching an output signal of the reproduction signal processing section and an output signal of the first switching means; A DA converter for converting the output signal of the switching means of No. 2 into an analog signal and stopping the conversion by an operation stop control signal, and a third converter for switching between the output signal of the DA converter and the analog input signal. By being composed of switching means,
To reduce power consumption by selectively stopping the operations of the AD converter, the recording signal processing unit, the reproduction signal processing unit, and the DA converter during an unnecessary period, and to provide a path for outputting the recording signal at the same time. This enables monitor output even when power consumption is reduced.

The present invention further includes an AD converter for converting an analog input signal into a digital signal and stopping the conversion by an operation stop control signal, and a first switching means for switching between the output of the AD converter and the digital input signal. A recording signal processing section for processing the output signal of the first switching means to output a recording signal and stopping the signal processing by an operation stop control signal; and a reproduction signal for processing a signal by the operation stop control signal. The reproduction signal processing unit to be stopped, the second switching unit for switching the output signal of the reproduction signal processing unit and the output signal of the first switching unit, and the output signal of the second switching unit are converted into analog signals. By being configured with a DA converter, it is possible to reduce power consumption by selectively stopping the operations of the AD converter, the recording signal processing unit, and the reproduction signal processing unit during an unnecessary period. , Which enables also monitor output when the power consumption reduced by providing a path for outputting the recording signal simultaneously.

[0012]

In the present invention, the operation of the recording signal processing unit or the reproduction signal processing unit is stopped by the operation stop control signal during the period when the recording and reproduction signal processing is unnecessary. Further AD conversion, D
The operation of the AD converter and the DA converter is stopped while the A conversion is unnecessary. At the same time, a path for outputting the input signal as an output signal is created by the second switching means and the third switching means for switching the output signal.

By performing these processes, the power consumption can be greatly reduced with a small-scale circuit, and the monitor output can be obtained.

Further, in the present invention, the operation of the recording signal processing unit or the reproduction signal processing unit is stopped by the operation stop control signal during the period when the recording and reproduction signal processing is unnecessary. Further AD
The operation of the AD converter is stopped during the period when conversion is unnecessary. At the same time, a path for outputting the input signal as the output signal is created by the second switching means for switching the output signal.

By performing these processes, the power consumption can be reduced with a smaller circuit and a monitor output can be obtained.

[0016]

1 is a block diagram of a video / audio signal recording / reproducing apparatus according to a first embodiment of the present invention. In FIG. 1, 1
Reference numeral 1 is an AD converter that converts an analog input signal (which may be a video signal or an audio signal) into a digital signal and stops the conversion by an operation stop control signal, and 12 is an output of the AD converter 11 and a digital input signal (digital audio signal). First switching means for switching (or digital video signal), 1
Reference numeral 3 denotes a recording signal processing unit for processing the output signal of the first switching means 12 to output a recording signal and stopping the signal processing by the operation stop control signal. A reproduction signal processing unit for stopping the processing, 15
Is the output signal of the reproduction signal processor 14 and the first switching means 12
Of the second switching means 15, 16 is a DA converter for converting the output signal of the second switching means 15 into an analog signal and stopping the conversion by the operation stop control signal, 17 is the output of the DA converter 16. It is a third switching means for switching between a signal and an analog input signal.

The operation of the video / audio signal recording / reproducing apparatus of the first embodiment configured as described above will be described below with reference to FIG.

First, at the time of recording, either the digital input signal or the analog input signal converted into digital by the AD converter 11 is selected by the first switching means 12, and the recording signal processing section 13 shuffles and compresses data. , Error correction code addition, modulation, etc. are performed, and output as a recording signal.

At the same time, the second switching means 15 selects the output of the first switching means 12 and outputs it as a digital output signal. This output signal serves as a digital monitor output during recording.

Further, the output signal of the second switching means 15 is converted into an analog signal by the DA converter 16, and the third signal is output.
Selected by the switching means 17 and output as an analog output signal. This output is an analog monitor output during recording.

At this time, the reproduction signal processing unit 14 receives the instruction to stop the operation by the operation stop control signal and enters the operation stop state, so that the power consumption can be reduced. The AD converter 11, the recording signal processing unit 13, and the DA converter 16 do not receive an instruction to stop the operation, and enter the operating state. The operation stop control signal is a serial signal or a parallel signal, and each unit receiving this signal can be selectively instructed to stop the operation.

When the recording source is an analog input signal, it is possible to select the analog input signal by the third switching means 17. In that case, the DA converter 16 is stopped to reduce the power consumption. Can be further increased.

Next, during reproduction, the reproduction signal is demodulated, error-corrected, data expanded, deshuffled, modified, etc. by the reproduction signal processing section 14. The second switching means 15 selects the output signal of the reproduction signal processing section 14. Then, the output signal of the second switching means 15, which is output as a digital output signal, is simultaneously converted into an analog signal by the DA converter 16,
It is selected by the third switching means 17 and output as an analog output signal.

At this time, the AD converter 11 and the recording signal processing unit 13 are in the operation stop state in response to the operation stop instruction by the operation stop control signal, and the power consumption can be reduced. The reproduction signal processing unit 14 and the DA converter 16 are put into the operating state without receiving the instruction to stop the operation.

Next, recording pause (RECPAUSE)
At times, either the digital input signal or the analog input signal converted to digital by the AD converter 11 is selected by the first switching means 12, and the second switching means 15 selects the output of the first switching means 12. And output as a digital output signal. This output signal serves as a digital monitor output when recording is temporarily stopped.

Further, the output signal of the second switching means 15 is converted into an analog signal by the DA converter 16, and the third signal is output.
Selected by the switching means 17 and output as an analog output signal. This output is an analog monitor output when recording is paused.

At this time, the recording signal processing unit 13 and the reproduction signal processing unit 14 receive the instruction to stop the operation by the operation stop control signal and enter the operation stop state to reduce the power consumption. The AD converter 11 and the DA converter 16 do not receive an instruction to stop the operation,
It becomes an operating state.

When the recording source is an analog input signal, it is possible to select the analog input signal by the third switching means 17, and in that case, the DA converter 16 is stopped to reduce the power consumption. Can be further increased. Further, when the digital output signal is unnecessary or the recording source is the digital input signal, the operation of the AD converter 11 can be stopped.

FIG. 2 is a block diagram of a video / audio signal recording / reproducing apparatus according to a second embodiment of the present invention. In FIG.
Reference numeral 21 is an AD converter that converts an analog input signal (which may be a video signal or an audio signal) into a digital signal and stops the conversion by an operation stop control signal. 22 is an output of the AD converter 21 and a digital input signal (digital audio signal). First switching means for switching (or digital video signal), 2
Reference numeral 3 denotes a recording signal processing unit for processing the output signal of the first switching means 22 to output a recording signal and stopping the signal processing by the operation stop control signal. A reproduction signal processing unit for stopping the processing, 25
Is the output signal of the reproduction signal processing section 24 and the first switching means 22.
Second switching means for switching the output signal of the second switching means 26, and DA for converting the output signal of the second switching means 25 into an analog signal.
It is a converter.

The operation of the video / audio signal recording / reproducing apparatus of the second embodiment configured as described above will be described below with reference to FIG.

First, at the time of recording, either the digital input signal or the analog input signal converted into digital by the AD converter 21 is selected by the first switching means 22, and the recording signal processing section 23 shuffles and compresses data. , Error correction code addition, modulation, etc. are performed, and output as a recording signal.

At the same time, the second switching means 25 selects the output of the first switching means 22 and outputs it as a digital output signal. This output signal serves as a digital monitor output during recording.

Further, the output signal of the second switching means 25 is converted into an analog signal by the DA converter 26 and output as an analog output signal. This output is an analog monitor output during recording.

At this time, the reproduction signal processing unit 24 receives the instruction to stop the operation by the operation stop control signal and enters the operation stop state, so that the power consumption can be reduced. The AD converter 21, the recording signal processing unit 23, and the DA converter 26 do not receive the instruction to stop the operation, and enter the operating state. The operation stop control signal is a serial signal or a parallel signal, and each unit receiving this signal can be selectively instructed to stop the operation.

Next, during reproduction, the reproduction signal is demodulated, error-corrected, data expanded, deshuffled, modified, etc. by the reproduction signal processing section 24. The second switching means 25 selects the output signal of the reproduction signal processing section 24. Then, the output signal of the second switching means 25, which is output as a digital output signal, is simultaneously converted into an analog signal by the DA converter 26,
It is output as an analog output signal.

At this time, the AD converter 21 and the recording signal processing unit 23 are in an operation stop state upon receiving an operation stop instruction by the operation stop control signal, and power consumption can be reduced. The reproduction signal processing unit 24 does not receive the instruction to stop the operation and enters the operation state.

Next, recording pause (RECPAUSE)
Sometimes, either the digital input signal or the analog input signal converted to digital by the AD converter 21 is selected by the first switching means 22, and the output of the first switching means 22 is selected by the second switching means 25. And output as a digital output signal. This output signal serves as a digital monitor output when recording is temporarily stopped.

Further, the output signal of the second switching means 25 is converted into an analog signal by the DA converter 26 and output as an analog output signal. This output is an analog monitor output when recording is paused.

At this time, the recording signal processing unit 23 and the reproduction signal processing unit 24 are in the operation stopped state in response to the operation stop instruction by the operation stop control signal, and the power consumption can be reduced. AD
The converter 21 does not receive the instruction to stop the operation and enters the operating state.

In the second embodiment, compared with the first embodiment,
The reduction effect at the time of recording the analog input signal and at the time of the recording primary stop is slightly low, but the number of switching means is one less and the circuit scale is smaller.

[0041]

As described above, according to the present invention, by providing the AD converter, the recording signal processing unit, the reproduction signal processing unit, and the DA converter with the operation stop control signal, it is possible to eliminate unnecessary periods. By selectively stopping the operation of, it is possible to realize a large reduction in power consumption with a small-scale circuit.
Also, second switching means for selecting and outputting the input signal of the recording signal processing unit and the output signal of the reproduction signal processing unit as the digital output signal, and the input signal of the AD converter and the DA converter as the analog output signal. By providing a third switching means for selecting and outputting the output signal, it is possible to select two types of monitor paths at the time of recording or at the time of recording pause, and a monitor suitable for that even if power consumption is reduced. The route can be secured, and its practical effect is great.

Further, according to the present invention, by inputting the operation stop control signal to the AD converter, the recording signal processing section and the reproduction signal processing section, the respective operations can be selectively stopped for an unnecessary period. The power consumption can be reduced with a smaller circuit. Further, by providing the second switching means for selecting and outputting the input signal of the recording signal processing unit and the output signal of the reproduction signal processing unit as the digital output signal, a monitor path is formed at the time of recording or recording pause. Even if the power consumption is reduced, it is possible to secure a suitable monitor path, and the practical effect is great.

[Brief description of drawings]

FIG. 1 is a block diagram of a video / audio recording / reproducing apparatus showing a first embodiment of the present invention.

FIG. 2 is a block diagram of a video / audio recording / reproducing apparatus showing a second embodiment of the present invention.

FIG. 3 is a block diagram of a conventional video / audio recording / reproducing apparatus.

[Explanation of symbols]

 11, 21 AD converter 12, 15, 17, 22, 25 Switching means 13, 23 Recording signal processing unit 14, 24 Reproduction signal processing unit 16, 26 DA converter

Front page continuation (72) Inventor Hidemi Oka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Iwa Hidaka 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd

Claims (2)

[Claims] 1. An analog / digital converter for converting an analog input signal into a digital signal and stopping the conversion by an operation stop control signal, and a first switching means for switching between the output of the analog / digital converter and the digital input signal. And a recording signal processing section for processing the output signal of the first switching means to output a recording signal and stopping the signal processing by an operation stop control signal, and a reproduction signal, and a signal processing by the operation stop control signal. And a second switching means for switching between the output signal of the reproduction signal processing section and the output signal of the first switching means, and the output signal of the second switching means for converting into an analog signal. A digital-analog converter that stops conversion by an operation stop control signal, and an output signal and an analog input signal of the digital-analog converter. A video / audio signal recording / reproducing apparatus comprising a third switching means for switching. 2. An analog / digital converter for converting an analog input signal into a digital signal and stopping the conversion by an operation stop control signal, and a first switching means for switching between the output of the analog / digital converter and the digital input signal. And a recording signal processing section for processing the output signal of the first switching means to output a recording signal and stopping the signal processing by an operation stop control signal, and a reproduction signal, and a signal processing by the operation stop control signal. And a second switching means for switching between the output signal of the reproduction signal processing section and the output signal of the first switching means, and the output signal of the second switching means for converting into an analog signal. A video / audio signal recording / reproducing apparatus comprising: