JP2001285793A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously record and reproduce digital signals and other video signals and audio signals in one device. SOLUTION: The digital signals and the other video signals and audio signals compression-encoded in synchronism with time reference information extracted from the digital signals are time-division multiplexed and the compression rate of the video signals and the audio signals is controlled and the recording rate of this device is switched so as not to make the transmission rate of the multiplexed signals exceed the recording rate of the device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, and more particularly to a recording / reproducing apparatus which not only records and reproduces a compression-encoded digital video signal and digital audio signal, but also reproduces a video signal and an audio signal which are not compression-encoded. The present invention relates to a recording / reproducing apparatus for recording / reproducing after compression encoding.

[0002]

2. Description of the Related Art In recent years, digital broadcast receiving apparatuses and IEEE
M in which digital video signals and digital audio signals supplied from a digital interface such as 1394 are multiplexed.
A recording / reproducing apparatus for inputting and recording / reproducing a PEG2 (Moving Picture Experts Group 2) transport stream has been developed. However, not only an MPEG2 transport stream but also an analog broadcast receiving apparatus and an analog video signal supplied from an analog input terminal and the like. A digital recording / reproducing apparatus capable of converting an analog audio signal into an MPEG-2 transport stream and recording / reproducing the digital audio signal has been developed, and a digital recording / reproducing apparatus described in JP-A-11-234618 is known.

A conventional recording / reproducing apparatus extracts a signal of a program to be recorded from a video signal and an audio signal multiplexed in an MPEG2 transport stream input from a digital broadcast receiving apparatus or an IEEE 1394 digital interface, or , An analog video signal and an analog audio signal are digitized, compressed and encoded in the MPEG2 format, converted into an MPEG2 transport stream, input to recording signal processing means, and recorded on a recording medium such as a magnetic tape or a magnetic disk. When the MPEG2 transport stream from a digital broadcast receiving apparatus or an IEEE 1394 digital interface is recorded, the extraction is performed. When the recording rate of the apparatus is switched and recorded so as not to break down while monitoring the transmission rate of the signal, and the analog video signal and analog audio signal are digitized and compressed and recorded, the compression rate of the compression encoding and the The recording rate of the apparatus is controlled so that recording is performed at an appropriate compression quality and recording rate.

[0004]

However, in the above-mentioned conventional recording / reproducing apparatus, a digital signal which has already been compression-encoded and an analog signal which has not been compression-encoded are converted into a signal.
There has been a problem that recording and reproduction cannot be performed simultaneously with an appropriate compression quality and recording rate while controlling the rate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and multiplexes a digital signal already compressed and coded with a digital signal obtained by compressing and compressing an analog signal. The recording mode of the recording signal processing means is switched according to the rate of the multiplexed digital signal, or the compression rate of the compression encoding means is controlled at an appropriate rate while monitoring the quality of the signal compressed by the compression encoding means. It is an object of the present invention to obtain a recording / reproducing apparatus capable of performing simultaneous recording.

[0006]

A recording / reproducing apparatus according to the present invention (claim 1) records a digital signal from a digital broadcast receiver and a digital signal obtained by converting an analog signal from an analog broadcast receiver. A recording / reproducing apparatus for reproducing, extracting means for extracting time reference information at the time of compression encoding of a digital signal which has already been compression encoded, and reference clock generating means for generating a reference clock from the time reference information. Compression encoding means for compressing and encoding an analog signal that has not been compression encoded in synchronization with the reference clock; and time-division multiplexing of the digital signal and the signal compression-encoded by the compression encoding means. Division multiplexing means, recording signal processing means for converting a signal time-division multiplexed by the time division multiplexing means and recording it on a recording medium; A rate control signal for controlling a transmission rate of the split multiplexed digital signal is obtained by a rate controlling means for outputting to the compression coding means.

According to a second aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, the rate control means controls a recording rate of the recording signal processing means according to a measurement result of the rate measurement. .

According to a third aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, the rate control means controls a compression rate of the compression encoding means according to a measurement result of the rate measurement. .

According to a fourth aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, reproduction signal processing means for reproducing a signal from the recording medium and a digital signal reproduced by the reproduction signal processing means are specified. Separation means for separating the video signal and the audio signal, a switching means for switching between the signal compressed and coded by the compression coding means and the signal separated by the separation means, and a decompression of the compression coded signal. And a decompression decoding means for decoding.

[0010]

Embodiments of the present invention will be described below. (Embodiment 1) FIG. 1 is a block diagram for explaining a recording / reproducing apparatus according to Embodiment 1 of the present invention. The recording / reproducing apparatus according to the first embodiment includes a digital signal input unit 1 for inputting a digital signal, a recorded program selection unit 3 for outputting a recorded program selection signal, and all or one of the already compressed and encoded digital signals. Extracting means 2 for extracting a signal of the section, reference clock generating means 4 for generating a reference clock from time reference information at the time of compression encoding of the video signal and audio signal extracted by the extracting means 2, and a video signal. A video signal input means 5, an audio signal input means 6 for inputting an audio signal, a compression encoding means 7 for compressing and encoding a video signal and an audio signal which are not compression encoded in synchronization with the reference clock, Time-division multiplexing means 8 for time-dividing the signal extracted by the extraction means 2 and the signal compression-encoded by the compression-encoding means, and a signal multiplexed by the time-division multiplexing means 8 Record signal processing means 9 for converting and recording on a recording medium 10, rate control means 11 for measuring the transmission rate of the signal multiplexed by the time-division multiplexing means 8, and reproduction signal for reproducing a signal from the recording medium Processing means 12
Playback program selection means 13 for outputting a playback program selection signal
A separating unit 14 for separating a specific video signal and an audio signal from the digital signal reproduced by the reproduced signal processing unit 12, a digital signal output unit 17 for outputting a digital signal from the separating unit 14, a compression encoding unit A switching means 15 for switching between the signal coded by the compression coding and the signal separated by the separation means 14, a expansion decoding means 16 for expanding and decoding the compression coded signal, and a video signal output means for outputting a video signal 18 and an audio signal output means 19 for outputting an audio signal.

Next, the operation will be described. Here, a signal input from a digital broadcast receiving apparatus or an IEEE 1394 digital interface via the digital signal input means 1 conforms to the MPEG2 system standard (ISO / IEC13818-1).
A case where the stream is an MPEG2 transport stream defined in the above will be described.

FIG. 2 shows an MP according to the first embodiment of the present invention.
FIG. 3 is a diagram illustrating an EG2 transport stream.

As shown in FIG. 2A, the MPEG2 transport stream Din is used to generate a packet including a video signal and an audio signal compressed and encoded in the MPEG2 format and a synchronization reference clock at the time of decompression decoding. Time reference information PCR (Program Clock Referenc)
e) packet and program selection information PSI (ProgramSp
2 is a packet obtained by multiplexing packets such as a packet containing ecific information). As shown in FIG. 2B, each packet has a packet length of 188 bytes and a packet identifier PID (Packet ID
These packets are transmitted by using a packet period identification signal ENABLE indicating a packet period of 188 bytes, byte data DATA, and a byte clock BCK. FIG. 2C shows an example of a packet related to a program included in the program selection information PSI and its packet identifier PID.

The MPEG2 packet multiplexed as described above
The transport stream Din is input to the extracting means 2 via the digital signal input means 1 of FIG. 1 to extract a packet related to a recorded program corresponding to the recorded program selection signal RecCH from the recorded program selecting means 3.

FIG. 3 is a block diagram for explaining the internal operation of the extracting means according to the first embodiment of the present invention. FIG.
When extracting and recording a packet related to the program 1ch multiplexed on the MPEG2 transport stream Din from the digital signal input means 1 of FIG.
3 is analyzed by the PSI analysis means 20 in FIG. 3, and the packet identifier PIDn related to the program 1ch selected based on the recorded program selection signal RecCH from the recorded program selection means 3 in FIG. Extract.

In the example of FIG. 2C, the packet identifier of the packet including the video signal of the program 1ch is 0x100.
The packet identifier of the packet containing the audio signal is 0x1002, and the packet identifier of the packet containing the accompanying information is 0x1004. The packet identifier PCR_PID of the packet including the time reference information PCR is 0x1003. Here, only the packet having the packet identifier PIDn related to the recorded program is selected by the packet selecting means 21 of FIG.
G2 transport stream D1 is output, and the packet identifier PID is
It extracts and outputs the time reference information PCR included in the packet that matches the R_PID, and outputs a PCR extraction timing signal LDH indicating the extracted timing.

FIG. 4 is a diagram showing input / output signals of the extracting means according to the first embodiment of the present invention. FIG. 4A shows FIG.
FIG. 4B shows an example of an MPEG2 transport stream Din input to the extracting means 2 of FIG.
5 shows an example of an MPEG2 transport stream D1 related to the recorded program 1ch extracted in FIG. FIG. 4 (c)
Shows an example of the extracted time reference information PCR and the PCR extraction timing signal LDH.

Next, the extracted time reference information PCR and PC
From the R extraction timing signal LDH, a reference clock STC synchronized with the time reference information PCR is generated by the reference clock generation means 4 of FIG. FIG. 5 is a diagram for explaining an internal operation of the reference clock generating means according to the first embodiment of the present invention.

The reference clock generating means 4 according to the first embodiment includes a PLL (Phase Locked Loop) comprising a comparing means 23, a counter 24, a digital-to-analog converting means 25, a low-pass filter 26, and a voltage-controlled oscillating means VCO 27. )
And the value of the counter 24 counted up using the reference clock STC generated by the voltage control oscillator VCO 27 from the value of the time reference information PCR loaded into the counter 24 based on the PCR extraction timing signal LDH and newly extracted. The value of the time reference information PCR thus obtained is compared by the comparing means 23, and in the example of FIG.
The value PCRa is loaded and the next PCR extraction timing LD
It counts up for each reference clock during the tPCR period until the fall of H, compares it with the PCR value PCRb at that time, and compares the comparison error via the digital-to-analog converter 25 and the low-pass filter 26 to the voltage controlled oscillator VCO2.
7 and the newly extracted time reference information P
If the count value is larger than the value of CR, the oscillation frequency of the voltage-controlled oscillation means VCO27 is decreased, and if the count value is small, the oscillation frequency of the voltage-controlled oscillation means VCO27 is increased, thereby synchronizing the reference clock STC with the time reference information PCR and recording. Time reference information P of video and audio signals of the program
A reference clock STC synchronized with CR is generated.

This reference clock STC is input to the compression encoding means 7 shown in FIG.
The video signal and the audio signal input from the video signal input means 5 and the audio signal input means 6 are compression-encoded in the MPEG2 format.

FIG. 6 is a block diagram for explaining the internal operation of the compression encoding means according to the first embodiment of the present invention. The compression encoding means 7 of the first embodiment is used as it is when the video signal Vin and the audio signal Ain input from the video signal input means 5 and the audio signal input means 6 of FIG. 1 are digital signals. When the video signal Vin and the audio signal Ain input from the video input means 5 and the audio signal input means 6 are analog signals, the video signal is digitized by the video analog / digital conversion means 28 and the audio analog / digital conversion means 29 and digitized. Data that can be handled by the video decoder 30 at the time of compression coding of the video signal, for example, ITU-R BT. The data is converted into data conforming to the standard 601 and compressed and encoded by the video compression encoding means 31 in the MPEG2 format, and the digitized audio signal is compression-encoded by the audio compression encoding means 32 in the MPEG2 format. The multiplexed video signal and audio signal are multiplexed by the multiplexing means 33 to output an MPEG2 transport stream D2. At this time, the processing performed by the video compression encoding unit 31, the audio compression encoding unit 32, and the multiplexing unit 33 is performed by using the clock generated by the clock generation unit 34 in synchronization with the input reference clock STC. MPE output from extraction means 2 in FIG.
The byte clock and the MPEG2 transport stream D2 for transmitting the G2 transport stream D1
The byte clock for transmitting the data is synchronized with the same frequency. Also, the high-frequency component amount at the time of compression of the video compression / encoding unit 31 and the audio compression unit 32 via the rate setting unit 35 of FIG. 6 according to the rate control signal RateCnt from the rate control unit 11 of FIG. The compression ratio is controlled by a method of increasing or decreasing the compression ratio.

FIG. 7 is a diagram showing an MPEG2 transport stream D2 output from the compression encoding means according to the first embodiment of the present invention. FIG. 7A shows an example in which the compression ratio is increased and the transport output is performed at a low rate, and FIG. 7B shows an example in which the compression ratio is reduced and the transport output is performed at a high rate.

Next, the first MPEG2 transport stream D1 and the second MP2 in the time-division multiplexing means 8 of FIG.
Time-division multiplexing of the EG2 transport stream D2 will be described.

FIG. 8 is a diagram for explaining the internal operation of the time division multiplexing means according to the first embodiment of the present invention. FIG.
In the writing side, the input first MPEG
2 The first write control unit 3 sends a write start pulse W1 indicating the head of a packet of the transport stream D1
6 and stored in a first FIFO (First In First Out) memory 38 in the first MPEG2 transport stream D.
1 is sequentially written from the beginning of the packet with a byte clock for transmitting the first MPEG-2 transport stream D2, the second write control means 37 creates a write start pulse W2 indicating the beginning of the input second MPEG2 transport stream D2, and creates the second FI
A byte clock for transmitting the second MPEG2 transport stream D2 is sequentially written to the FO memory 39 from the beginning of the packet. The byte clock for transmitting the first MPEG2 transport stream D1 and the byte clock for transmitting the second MPEG2 transport stream D2 are the reference clock as described in the description of the compression encoding means 7 in FIG. Synchronized at the same frequency via STC. On the read side, the read start pulses R1, R2
First and second FIFO memories 38 and 39 according to
, And sequentially outputs signals DR1 and DR2 that are half-time-compressed by a byte clock having twice the frequency synchronized with the byte clock at the time of writing.
Switching is performed by the switching means 40 in accordance with the selection signal Sel from 1 to perform time division multiplexing. The program selection information replacement means 42 rewrites the program selection information PSI so that the first and second MPEG2 transport streams can be separated, and outputs a signal Dmpx.

FIG. 9 is a diagram showing program selection information according to the first embodiment of the present invention. FIG. 10 is a diagram showing internal signals and input / output signals of the time division multiplexing unit according to the first embodiment of the present invention.

(A) is an input first MPEG2 transport stream D1. (B) is the first MP
EG2 is a write start pulse W1 indicating the head of the transport stream. (C) is the first read start pulse R1. (D) is the output signal DR1 from the first FIFO memory 38 that has been time axis compressed.
(E) is the second MPEG2 transport stream D
2. (F) is a write start pulse W2 indicating the head of the input second MPEG2 transport stream. (G) is the second read start pulse R2
It is. (H) is the output signal DR2 from the second FIFO memory 39 that has been time axis compressed. (I) is a selection signal Sel from the read control means 41. (J) is an example of the MPEG2 transport stream Dmpx multiplexed and the program selection information PSI is replaced. At the time of recording,
The multiplexed MPEG2 transport stream Dmpx is input to the recording signal processing means 9 in FIG. 1, converted into an appropriate signal, and recorded on the recording medium 10 in FIG.

At the time of reproduction, the signal recorded on the recording medium 10 shown in FIG.
1 is output as the PEG2 transport stream PbTS, and the separation program 14 in FIG.
The packet having the packet identifier associated with the bCH is separated and extracted, and the first MPEG2 transport stream Do is extracted.
ut and the second MPEG2 transport stream T
S2 is separated and output.

FIG. 11 is a diagram showing input / output signals of the separating means according to the first embodiment of the present invention. (A) of FIG.
Shows an example of the MPEG2 transport stream PbTS input to the separating means 14, and FIG.
And (c) show an example of the separated first MPEG2 transport stream Dout and second MPEG2 transport stream TS2.

The MPEG2 transport stream D2 compressed and encoded by the compression encoding means 7 is selected at the time of recording by the switching means 15 in FIG.
2 is input to the decompression decoding means 16.

FIG. 12 is a block diagram for explaining the internal operation of the decompression decoding means according to the first embodiment of the present invention. In FIG. 12, MP is switched via switching means 15 in FIG.
The transport stream Sin of EG2 is input,
The program selection information PS by the program information analysis means 43 of FIG.
The packet selecting unit 44 is switched according to the packet identifier PID extracted by analyzing the I, and the packet including the selected video signal and audio signal is input to the video expansion decoding unit 45 and the audio expansion decoding unit 46. The packet including the time reference information PCR is input to the clock generation means 47. In the clock generating means 47, the time reference information PC
R is extracted and a clock for decompression decoding synchronized with the time reference information PCR is generated, and the video and audio signals are decompressed by the video decompression decoding unit 45 and the audio decompression decoding unit 46 in synchronization with the generated clock. Decompress and decrypt. In the video encoder 48, for example, the ITU-RBT. In the case of converting digital data conforming to 601 into a digital signal such as an NTSC video signal and outputting the analog signal, the digital video signal which has been subjected to expansion decoding and encoded into an NTSC video signal and the like and the digital audio signal which has been expansion decoded are converted. Output from the video signal output means 18 and the audio signal output means 19 via the digital / analog conversion means 49 and 50. In the case of digital output, the digital signal is output from the video signal output unit 18 and the audio signal output unit 19 without going through the digital / analog conversion units 49 and 50.

FIG. 13 is a diagram for explaining the operation of the rate control means according to the first embodiment of the present invention. FIG.
(A), the number of packets per fixed period is counted, and when the counted number is smaller than the fixed value, the recording mode switching signal RecMod outputs the recording signal processing means 9.
Is switched to a low-rate recording mode, and recording is performed. As shown in FIG. 13B, the number of packets per fixed period is counted, and when the counted number is larger than a predetermined value, recording signal processing is performed by a recording mode switching signal RecMod. The packet to be recorded by switching the means 9 to the high-rate recording mode is A
Recording is performed by, for example, simultaneously recording the recording signals for two channels of ch and Bch. Further, at the time of recording, the video output means 1 is transmitted via the decompression decoding means 16 of FIG.
8 and the video signal Vou output from the audio output means 19
If the rate of the multiplexed MPEG2 transport stream Dmpx is high while monitoring the t and the audio signal Aout, the compression rate of the compression encoding means 7 is increased according to the rate control signal RecCnt from the rate control means 11. , The MPEG2 transport stream D2 from the compression encoder 7 is recorded at a reduced rate,
2 when the rate of the transport stream Dmpx is low, the rate control signal Re from the rate control means 11
It is possible to reduce the compression rate of the compression encoding means 7 according to cCnt and increase the rate of the MPEG-2 transport stream D2 from the compression encoding means 7 for recording.

As described above, in the recording / reproducing apparatus according to the first embodiment, the compression encoding means for compressing and encoding an analog signal such as video and audio, the digital signal obtained by compressing and encoding the analog signal, and the compression code Time-division multiplexing means for time-division multiplexing the multiplexed digital signal; rate control means for outputting a rate control signal for controlling the transmission rate of the multiplexed digital signal to the compression encoding means; Separating means for separating a specific video signal and audio signal from the digital signal reproduced by the processing means; switching means for switching between the signal compressed and coded by the compression coding means and the signal separated by the separating means; A decompression decoding means for decompressing and decoding the coded signal, wherein the recording signal processing means is operated in accordance with the total transmission rate of the multiplexed digital signal. The recording mode is switched to another recording mode, and recording is performed at a maximum recording rate, or while the quality of the signal compressed by the compression encoding unit is monitored, the compression during the compression encoding by the compression encoding unit is performed. Since the rate is adjusted, two recording signals can be simultaneously recorded and reproduced on the recording medium at an appropriate recording rate.

[0033]

As described above, according to the recording / reproducing apparatus according to the present invention (claim 1), a digital signal from a digital broadcast receiver and a signal obtained by converting an analog signal from an analog broadcast receiver into a digital signal. A recording / reproducing apparatus for simultaneously recording / reproducing on a recording medium, extracting means for extracting all or a part of the signal from the compression-encoded digital signal, and a video signal and an audio signal extracted by the extracting means. Time reference information extracting means for extracting time reference information at the time of compression encoding, reference clock generating means for generating a reference clock from the time reference information, and a video signal and an audio signal which are not compression encoded Compression encoding means for performing compression encoding in synchronization with the signal; and time-dividing the signal extracted by the extraction means and the signal compression-encoded by the compression encoding means. A multiplexing unit; a recording signal processing unit for converting the signal multiplexed by the multiplexing unit and recording the converted signal on a recording medium; and a rate control unit for measuring a transmission rate of the signal multiplexed by the multiplexing unit. Therefore, it is possible to simultaneously record two signals, that is, a digital signal that has already been compression-encoded and another uncompressed video signal and audio signal.

According to the present invention (claim 2), claim 1
In the recording / reproducing apparatus described above, the recording rate of the recording signal processing means is controlled according to the measurement result of the rate control means, so that the recording rate can be controlled so that a plurality of recording signals can be recorded simultaneously.

According to the present invention (claim 3), claim 1
In the recording / reproducing apparatus described above, since the compression rate of the compression encoding means is controlled according to the measurement result of the rate control means, the compression rate at the time of compression encoding is controlled so that a plurality of recording signals can be recorded simultaneously. can do.

According to the present invention (claim 4), claim 1
A reproducing signal processing means for reproducing a signal from the recording medium; a separating means for separating a specific video signal and an audio signal from a digital signal reproduced by the reproducing signal processing means; Switching means for switching between the signal compressed and coded by the coding means and the signal separated by the separating means; and decompression decoding means for decompressing and decoding the compressed and coded signal. Select the signal compressed by the compression encoding means, select the signal from the separation means at the time of reproduction,
Since the decompression decoding is performed by the decompression decoding means,
The rate control can be performed while expanding and decoding the compressed signal during recording and monitoring. Also, at the time of reproduction, the recorded numbers can be separated and one can be expanded and decoded and monitored while the other is output as MPEG2 transport.

[Brief description of the drawings]

FIG. 1 is a block diagram for explaining a recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an MPEG2 transport stream according to the first embodiment of the present invention.

FIG. 3 is a block diagram for explaining an internal operation of an extracting unit according to the first embodiment of the present invention.

FIG. 4 is a diagram showing input / output signals of an extracting unit according to the first embodiment of the present invention.

FIG. 5 is a block diagram for explaining an internal operation of a reference clock reproducing unit according to the first embodiment of the present invention.

FIG. 6 is a block diagram for describing an internal operation of the compression encoding unit according to the first embodiment of the present invention.

FIG. 7 is an MPEG2 transport stream D2 output from the compression encoding unit according to the first embodiment of the present invention.
It is a figure showing a signal.

FIG. 8 is a block diagram for explaining an internal operation of the time division multiplexing unit according to the first embodiment of the present invention.

FIG. 9 is a diagram showing program selection information according to the first embodiment of the present invention.

FIG. 10 is a diagram showing internal signals and input / output signals of the time division multiplexing unit according to the first embodiment of the present invention.

FIG. 11 is a diagram showing input / output signals of a separating unit according to the first embodiment of the present invention.

FIG. 12 is a block diagram for describing an internal operation of the decompression decoding unit according to the first embodiment of the present invention.

FIG. 13 is a diagram for explaining an operation of the rate control means according to the first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Digital signal input means 2 Extraction means 3 Recorded program selection means 4 Reference clock generation means 5 Video signal input means 6 Audio signal input means 7 Compression encoding means 8 Time division multiplexing means 9 Recording signal processing means 10 Recording medium 11 Rate control means 12 playback signal processing means 13 playback program selection means 14 separation means 15 switching means 16 decompression decoding means 17 digital signal output means 18 video signal output means 19 audio signal output means 20 program information analysis means 21 packet selection means 22 time reference information extraction Means 23 Comparison means 24 Counter 25 Digital-to-analog conversion means 26 Low-pass filter 27 Voltage-controlled oscillating means 28 Analog-to-digital conversion means for video 29 Analog-to-digital conversion means for audio 30 Video decoder 31 Video compression encoding means 32 Audio compression code Means 33 Multiplexing means 34 Clock generating means 35 Rate setting means 36 Write control means 37 Write control means 38 FIFO memory 39 FIFO memory 40 Switching means 41 Read control 42 Program selection information replacement means 43 Program selection information analysis means 44 Selection means 45 Video expansion Decoding means 46 Decompression decoding means for audio 47 Clock generating means 48 Video encoder 49 Digital-to-analog conversion means for video 50 Digital-to-analog conversion means for audio

Continuing on the front page (72) Inventor Akira Kotani 8-1, Koshinmachi, Takamatsu-shi, Kagawa Prefecture Inside Matsushita Hisashi Denki Kogyo Co., Ltd. (72) Inventor Shinji Takahashi 8-1, Koshinmachi, Takamatsu-shi, Kagawa Prefecture Hisashi Matsushita Electric Industrial Inside (72) Inventor Yuji Moriyama 8-1, Koshincho, Takamatsu-shi, Kagawa Prefecture Inside of Matsushita Hisashi Denshi Kogyo Co., Ltd. (72) Inventor Takayuki Omatsu 8-1, Koshinmachi, Takamatsu-shi, Kagawa Matsushita Hisashi Denshi Kogyo Co., Ltd. (72) Inventor Masaharu Hashida 8-1, Koshinmachi, Takamatsu-shi, Kagawa Prefecture Inside Matsushita Hisashi Denko Kogyo Co., Ltd. (72) Inventor Emiko Iio 8-1, Koshinmachi, Takamatsu-shi, Kagawa Prefecture Matsushita Hisashi Denko Kogyo Co., Ltd. Term (reference) 5C053 FA21 GA06 GA14 GB05 GB17 GB38 JA22 KA08 KA18 KA24 5C059 LA01 MA00 RB02 RB10 RB16 RC04 RC24 SS02 SS11 UA02 UA05 UA09 5D044 AB05 AB07 BC01 CC01 DE03 DE12 DE15 EF01 GK02 BC07 BC07 BC07 BC06 BC07 BC06 BC07 BC07 BC25 BD03

Claims (4)

[Claims] 1. A recording / reproducing apparatus for recording and reproducing a digital signal from a digital broadcast receiver and a digital signal obtained by converting an analog signal from an analog broadcast receiver, wherein the digital signal has already been compression-encoded. Extracting means for extracting time reference information at the time of compression encoding of a signal; reference clock generating means for synchronizing a clock with the time reference information to generate a reference clock; and converting the analog signal not compressed and encoded to the reference clock. Compression encoding means for performing compression encoding in synchronization with the digital signal; time division multiplexing means for time division multiplexing the digital signal and the signal compression encoded by the compression encoding means; time division multiplexing with the time division multiplexing means. Recording signal processing means for converting the multiplexed signal and recording the converted signal on a recording medium; and transmission rate of the digital signal time-division multiplexed by the time division multiplexing means. And a rate control means for outputting a rate control signal for controlling the rate to the compression encoding means. 2. The recording / reproducing apparatus according to claim 1, wherein said rate control means controls a recording rate of said recording signal processing means according to a measurement result of rate measurement. Playback device. 3. The recording / reproducing apparatus according to claim 1, wherein said rate control means controls a compression rate of said compression encoding means in accordance with a measurement result of rate measurement. Playback device. 4. The recording / reproducing apparatus according to claim 1, wherein a reproduction signal processing means for reproducing a signal from the recording medium, and a specific video signal and an audio signal from a digital signal reproduced by the reproduction signal processing means. Separating means for separating, a switching means for switching between the signal compressed and coded by the compression coding means and the signal separated by the separating means, and a decompression decoding means for decompressing and decoding the compressed and coded signal; A recording / reproducing apparatus comprising: