CN1327590A - Transmission of a digital information signal having M bit PCM samples - Google Patents
Transmission of a digital information signal having M bit PCM samples Download PDFInfo
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- CN1327590A CN1327590A CN00802192A CN00802192A CN1327590A CN 1327590 A CN1327590 A CN 1327590A CN 00802192 A CN00802192 A CN 00802192A CN 00802192 A CN00802192 A CN 00802192A CN 1327590 A CN1327590 A CN 1327590A
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- 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
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- G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
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- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/018—Audio watermarking, i.e. embedding inaudible data in the audio signal
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- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
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- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1262—Formatting, e.g. arrangement of data block or words on the record carriers with more than one format/standard, e.g. conversion from CD-audio format to R-DAT format
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Abstract
A transmitter is disclosed for transmitting a digital information signal having M bit PCM samples via a transmission medium. The M bit PCM signal is split (8) into a P bit PCM signal, whereby P < M and a difference signal. The P bit PCM signal is a lower quality representation of the M bit PCM digital information signal and the difference signal is obtained by subtracting the P bit PCM signal from the M bit PCM signal. The difference signal is data compressed (16) so as to obtain a data compressed difference signal. The P bit PCM signal and the data compressed difference signal are combined (24) so as to obtain a transmission signal. The transmission signal is transmitted via the transmission medium (TRM).
Description
The present invention relates to a transmitter, be used to send digital information signal with M bit PCM samples, relate to a receiver, be used for carrying the transmission signals of digital information signal and producing Q bit PCM signal therefrom from the transmission medium reception, described Q bit PCM signal is the expression of described digital information signal, relates to a record carrier that utilizes this transmitter to obtain, when the formation at device, at recording information, and relate to a kind of transmission method.
Transmitter and receiver defined above is known in USP 5,479,168 for example.Described file description is used for the method for signal encoding, transmission and decoding, so that provide digital information signal improved regeneration, keep and the industrial standardization signal receiver compatibility that does not combine decoding characteristics of the present invention simultaneously with M bit sample value by receiver with described coding/decoding method.This transmitter analysis and this digital information signal of encoding are so that obtain the digital information signal of revision and the control code by some transmission medium.This control code has with the relation of this digital information signal characteristic and is used for the operation that coding digital information signal is carried out.The characteristic that this control code is used to control decode operation and rebuilds this digital information signal.
The object of the invention provides the transmitter and receiver with another and more uncomplicated method of sending and receiving digital information signal with M bit PCM samples, should send signal simultaneously and keep and the industrial standardization signal reporudcing apparatus compatibility that does not combine method of reseptance of the present invention, described digital information signal has than the higher quality of signal by described industrial standardization replay device regeneration.
Transmitter according to the present invention comprises: input media is used to receive M bit PCM signal;
Tripping device is used for separating M bit PCM signal and the difference signal of the difference between M bit PCM signal and the P bit PCM signal, the wherein M＞P of the expression of the digital information signal with P bit PCM samples;
First signal combination device is used to make up P bit PCM signal and this difference signal, so that obtain the transmission signals by some transmission medium.
This receiver according to the present invention comprises:
Indexing unit is used for from this transmission signals of transmission medium retrieval,
Multichannel decomposer, the P bit PCM that is used for obtaining from this transmission signals this digital information signal represent and difference signal,
Signal combination device is used to make up P bit PCM signal and difference signal, so that obtain Q bit PCM signal, Q＞P.
The present invention is based on following understanding.The digital information signal that will have a M bit PCM samples according to transmitter of the present invention is separated into the expression of the digital information signal with P bit PCM samples and difference signal.The expression and the difference signal of digital information signal are combined, so that obtain the transmission signals of transmission.This transmission signals sends by transmission medium.
In the preferred embodiment of transmitter, first signal combination device is applied to obtain transmission signals, and this transmission signals comprises the N bit PCM signal of P bit PCM signal version, N 〉=P.The advantage of described embodiment is to receive and to handle so transmission signals of acquisition by the prior art receiver, and the prior art receiver can receive and handle and export N bit PCM signal.
The data capacity that transmits these difference signal needs is relatively little usually.Even can carry out data compression to this difference signal, so that further reduce the data capacity of needs.Therefore, this transmitter preferably is equipped with data compression device, so that reduce to transmit the data capacity that this difference signal needs.This data compression device preferably includes the scrambler of a tonequality, eliminates the irrelevant and superfluous signal in the difference signal.
This separation can be separated into the P highest significant position by the M bit PCM samples with digital information signal so that acquisition P bit PCM signal and M-P least significant bit (LSB) are so that obtain difference signal.In the situation of P＜N, the N-P least significant bit (LSB) may be used for storing at least a portion of this difference signal, and it can be data compression.
The data technique of imbedding may be used for determining being used in the P bit PCM signal transmitting the data channel of imbedding of at least a portion of difference signal.The data technique of imbedding by use, send N bit PCM signal sensation S/N than approximately with the S/N of P bit PCM signal than being identical.
Can retrieve the regeneration of two component of signals and the M bit PCM numerical information of regenerating therefrom of transmission according to receiver of the present invention.
With further reference to the explanation of the embodiment that describes during figure describes below, these and other objects of the present invention have become obviously, wherein
Fig. 1 represents first embodiment of this transmitter,
Fig. 2 represents first embodiment of this receiver,
Fig. 3 represents to be used to receive the prior art receiver of the transmission signals that the transmitter by Fig. 1 produces,
Fig. 4 represents first embodiment of the tripping device of this transmitter,
Fig. 5 is illustrated in the 3rd embodiment of signal combination unit in the transmitter of Fig. 1,
Fig. 6 is illustrated in the 3rd embodiment of the demultiplex unit in the receiver of Fig. 2,
Fig. 7 is illustrated in the 4th embodiment of the signal combination unit in the transmitter of Fig. 1,
Fig. 8 is illustrated in the 4th embodiment of the demultiplex unit in the receiver of Fig. 2,
Fig. 9 represent with the transmitter of the form of pen recorder and
Figure 10 represents the receiver with the formation of transcriber,
Figure 11 represent with another embodiment of the transmitter of pen recorder form and
Figure 12 represents another embodiment with the receiver of transcriber form.
Fig. 1 represents an embodiment of this transmitter.This transmitter has an input end 1, is used to receive the digital information signal such as the digital audio and video signals with M bit PCM samples.The digital information signal of this numerical information by analog version is provided obtains to the input 2 of A/D transducer 4.4 pairs in A/D transducer is added to the sample of signal of its input 2 and the input end 1 of digitized M bit sample value to this transmitter is provided.Input end 1 is coupled to the input 6 of separative element 8.It is P bit PCM signal and a difference signal that separative element is used to separate the M bit PCM signal that is added to its input, this digital information signal has the expression of the digital information signal of M bit PCM samples, P＜M, difference signal obtains by deduct P bit PCM signal from the M bit PCM signal that is added to its input 6.P bit PCM signal and difference signal offer first output, 10 and second output 12 of separative element 8 respectively.
As an example, can select M equal 24 and P equal 16 so that this expression can be for example with form storage about the industrial standardization signal of the CD of standard.
First input 22 of signal combination unit 24 is coupled in the output 10 of separative element 8.Second input 26 of signal combination unit 24 is coupled in the output 18 of data compression unit 16.Signal combination unit 24 will offer its input 22 and 26 signal combination is at least one serial data stream, and it is adapted to pass through transmission medium TRM transmission.This signal combination step in this assembled unit 24 can comprise the chnnel coding step of knowing in the present technique.
Above-mentioned transmitter function is as follows.Digital information signal offers input end 1.The numerical information that separative element will have the M bit PCM samples is split up into P bit PCM signal, and it is the expression of the low signal quality of digital information signal and difference signal.This difference signal comprises the signaling information from the M bit PCM signal of receiver side needs, so that by combination P bit PCM signal and the expression of this difference signal with the high-quality digital information signal of M bit PCM signal regeneration.If so the combination of the P bit PCM signal of data compression and difference signal is so that obtain to pass through the transmission signals of transmission medium TRM transmission.This transmission signals transmits P bit PCM signal, makes not in conjunction with the receiver of the characteristic of the present invention described signal of can regenerating.
This transmission medium TRM can be broadcast channel or record carrier, such as record carrier magnetic or light.This transmission signals sends to receiver by transmission medium TRM.
Fig. 2 illustrates an embodiment of the receiver that is used to the regeneration that receives this transmission signals and regenerate original digital information signal therefrom.
The input 60 of decomposing (DEMUX) unit 62 by multichannel receives this transmission signals TRM.Demultiplex unit 62 can be retrieved P bit PCM signal and first input 68 of described signal to signal combination unit 70 is provided from this transmission signals.
Another output 66 inputs 72 of being coupled to data expanding element 74 of demultiplex unit 62.Demultiplex unit 62 can be retrieved this difference signal and retrieval like this is provided from this transmission signals signal is to output 66, and second input 76 of signal combination unit 70 is coupled in output 66.Signal combination unit 70 is combined in the signal that its first and second input receives, so that obtain the Q bit PCM regeneration of original digital information signal.If by the requirement of D/A transducer, the output 80 of receiver is coupled in the output 78 of signal combination unit 70.Receiver can be equipped the 2nd D/A transducer of not expressing in addition, and it has an input of the output 64 of being coupled to demultiplex unit 62 and an output of being coupled to another output terminal of not expressing.
The function of the receiver of Fig. 2 is as follows.Demultiplex unit 62 retrieval P bit PCM signals, it is that the lower signal quality of the digital information signal that sends is represented and provided described signal in output 64.
If so data compression, demultiplex unit 62 can also be retrieved difference signal and provide described signal to output 66.If necessary, 74 retrievals of data expanding element are expanded this signal so that obtain this difference signal and second input 76 of described difference signal to signal combination unit 76 is provided at the difference signal of the data compression of input 72.This difference signal relates to some signals of the digital information signal that is lower than certain level and the quantizing noise that is caused by the separative element in this transmitter, and these signals do not occur with the P bit PCM signal of representing M bit PCM digital information signal.Data expanding element 84 can comprise a lossy tonequality demoder or a loss-free entropy decoder, such as the Huffman demoder.These demoders are known in present technique.Signal combination unit 70 combination P bit PCM signals and difference signal so as to obtain original digital information signal regeneration Q bit PCM signal and the output 78 of Q bit PCM signal to it is provided.This Q value is relevant with the data expanding element 84 that uses.According to the complicacy of data expanding element 84, this data expanding element can be rebuild this signal with higher quality.The value Q of the Q bit PCM signal that is produced by signal combination unit has a relation with the signal quality of the difference signal of the reconstructions that receive in input 76.In order to produce regenerated signal, must increase the Q value at least with the signal quality higher than P bit PCM signal.Therefore, Q＞P.The D/A transducer 82 changed digital information signals that can provide be regenerated as a simulating signal.
Fig. 4 is illustrated in the embodiment of the separative element in the transmitter of Fig. 1.The input 6 of separative element 8 receives the digital information signal with M bit PCM samples.Quantizer 4.2 is carried out the quantification of M bit PCM signal so that obtain the P bit PCM signal of expression digital information signal and the output 10 of P bit PCM signal to separative element 8 is provided.The quantization step that is performed can be common rounding off or break-in facility, but any other quantization method also can be suitable, comprises using noise shaping and dither (dithering).Separative element is also equipped subtrator 4.4, is used for deducting P bit PCM signal so that obtain this difference signal from M bit PCM signal.This difference signal offers the output 12 of separative element 8.Separative element can also be applied to P highest significant position by the M bit PCM samples is provided to output 10 with provide the M-P least significant bit (LSB) to carry out break-in facilities to output 12.
Transmitter preferably and the industrial standardization signal reproducing apparatus such as the CD Player compatibility.Therefore signal combination unit 24 is applied to produce the transmission signals with N bit PCM signal.For with the CD compatibility, standard N should equal 16.Therefore, separative element 8 preferably provides P bit PCM signal, so P≤N.
Demultiplex unit of prior art receiver shown in Fig. 3 equipment 62 ' it can N bit sample value is represented, had to the P bit of key registration word information signal from the transmission signals that sends by transmission medium TRM N bit PCM signal.Receiver has a D/A transducer 82 ', so the expression of the digital information signal of analog version is to output 84.In the prior art receiver, the D/A transducer with smaller dynamic range is enough, there N＜M.
First embodiment of signal combination unit 24 can use in the situation of P＜N.Signal combination unit receives P bit PCM signal in first input 22.The sample value of P bit PCM signal is used for producing the sample value of P highest significant position from the N bit PCM signal of transmission signals.If so data compression, the N-P bit least significant bit (LSB) in N bit PCM signal are used for being transmitted at least the part that second of signal combination unit 24 is imported 26 these difference signals that receive.The prior art receiver has regeneration the N bit PCM signal of P bit PCM signal of the lower quality regeneration of digital information signal.N-P least significant bit (LSB) in the N bit PCM signal is to regenerate as the low signal noise that is added to P bit PCM signal.When N bit PCM signal had little amplitude, described low signal noise may be audible.
First embodiment of the demultiplex unit 62 in the receiver of Fig. 2 is applied to receive the transmission signals with N bit PCM signal.This demultiplex unit extracts the P highest significant position from N bit PCM signal, so that obtain to offer the P bit PCM signal of output 64.In addition, if so data compression is so that offer output 66, this demultiplex unit extracts the N-P least significant bit (LSB) from N bit PCM signal, so that obtain difference signal.
Signal combination unit in the transmitter of Fig. 1 and below the demultiplex unit 62 of the receiver of Fig. 2 among the embodiment, these unit application are in sending, receive the transmission signals with N bit PCM signal respectively, so N equals P.
If so data compression is so that obtain this transmission signals, use the data technique of knowing in the present technique of imbedding, combination P bit PCM signal and difference signal among second embodiment of the signal combination unit 24 in the transmitter of Fig. 1.Signal combination unit is determined the data channel of imbedding in P bit PCM signal.The described data channel of imbedding is used to transmit difference signal.In the prior art receiver, transmission signals regeneration has the expression of the digital signal of the data channel of imbedding, but at this moment the data in the data channel of imbedding are imperceptible.
If so data compression, second embodiment of the demultiplex unit 62 in the receiver of Fig. 2 is suitable for deriving the P bit PCM signal of imbedding data channel, and the data channel of imbedding from described P bit PCM signal is derived difference signal.
Fig. 5 is illustrated in the 3rd embodiment of the signal combination unit 24 in the transmitter of Fig. 1.Channel Modulation unit 5.2 is received in P bit PCM signal and this composite signal of processing of first input, 22 receptions of signal combination unit 24, so that obtain the m bit channel word of a sequence.This Channel Modulation unit preferably includes n-m channel modulator.Second input 26 difference signals that received and the described remainder of response that generator unit 5.4 is received in signal combination unit 24 produce P merging bit.M bit channel word and P that unit 5.6 receives this sequence merge bit and insert P merging bit between the m of adjacency bit channel words, so that the acquisition transmission signals, and provide the output 28 that transmits signals to signal combination unit 24 so that by transmission medium TRM 32 transmission.P merges bit and is used to normally prevent that (d k) limits the additional task of violating point and being used for DC control between the adjacent channel word.When doing like this, respond the quantity of information of this difference signal, still have living space and select those to merge one or more bit of bit.Generator unit uses this space to produce this merging bit.
The 3rd embodiment of the demultiplex unit 62 of the receiver of Fig. 6 presentation graphs 2.Unit 6.2 receives the transmission signals of the input 60 that offers demultiplex unit 62.This transmission signals comprises that the P that has between adjacent m bit channel word of each time merges the m bit channel word of a sequence of bit.Unit 6.2 separates m bit channel word and the described P that described transmission signals is a sequence and merges bit.The m bit channel word of this sequence offers the channel demodulator unit 6.4 of arranging to be preferably used in the m-n Channel Modulation, so that obtain the expression of digital information signal.Expression signal with the form of the digital stereo signals of standard with P bit PCM samples is provided for output terminal 64.P merges bit and offers processing unit 6.6.Arrange processing unit 6.6 to be used to handle P and merge bit, so that obtain difference signal, if so data compression is used to offer output terminal 66.
Fig. 7 is illustrated in the 4th embodiment of the signal combination unit 24 in the transmitter of Fig. 1.Processing unit 7.2 is received in the input 22 places received P bit PCM signal of signal combination unit 24 and handles this P bit PCM signal, so that obtain the q byte data piece of a sequence.This processing unit can comprise a cross-interleaved Ruide-solomon encoder.The value of this q is 32 for the CD form of standard.Subcode scrambler 7.4 receives this difference signal, if so data compression offers its input, and responds described difference signal generation r byte subcode.Subcode in the standard CD form is auxiliary data flow in essence.Respond this difference signal and obtain a bit at least such as the described r byte subcode of U subcode.Unit 7.6 receives the q byte data of this sequence and determines and described r byte subcode, and inserts r byte subcode between adjacent m bit channel word, so that obtain to write on the signal on the record carrier 32.Be preferably on the transmission medium with this form of record carrier and send before the described signal, for example by this signal of EFM scrambler chnnel coding.
The 4th embodiment of the demultiplex unit 62 in the receiver of Fig. 8 presentation graphs 2.Unit 8.2 receives the transmission signals of the input 60 that is provided for demultiplex unit 6.This transmission signals is included in the Q byte data piece that has a sequence of r byte subcode between the adjacent q byte data piece of each time.Unit 8.2 is split up into described transmission signals the q byte data piece and the described r byte subcode of one sequence.This separation is the physical location according to the subcode in q byte data piece and the transmission signals.The q byte data piece of this sequence is provided for the processing unit 8.4 of arranging to be used to handle the q byte data piece of this sequence, so that obtain the PCM signal of P bit.Processing unit 8.4 can the executable operations Ruide-Saloman decoding and go cross-interleaved.May be provided for output terminal 64 with the transmission signals of the digital stereo signals form of standard.R byte subcode offers processing unit 8.6.Arrange processing unit 8.6 to be used to handle r byte subcode, if so data compression, so that from least one bit of r byte subcode, would obtain difference signal.This difference signal offers the output terminal 66 of demultiplex unit 62.
Fig. 9 represents the transmitter with device form, is used for this digital information signal of record on record carrier.The circuit diagram that in Fig. 9, replaces Fig. 1 with the 9.2 circuit square frames of representing.Therefore the input end 1 of the pen recorder of Fig. 9 is the input end 1 that is equivalent among Fig. 1, and the terminal 28 among Fig. 9 is equivalent to the output 28 of the signal combination unit 24 among Fig. 1.This pen recorder also comprises write device 9.4, and the output signal that provides on the terminal 28 of record carrier 9.8 is provided.Record carrier 9.8 can be the type of magnetic.In this case, write device 9.4 comprises one or more magnetic head 9.6, is used for writing this information at the magnetic track of record carrier 9.8.In another embodiment, record carrier 9.8 is record carriers of light.At this moment this write device 9.4 comprises the write head of a light, is used for writing this information at the magnetic track of record carrier 9.8.Usually, before record, the signal of record carries out chnnel coding, and according to the embodiment of circuit square frame 9,2, write device 9.4 comprises a chnnel coding unit.
Figure 10 represents the receiver with device form, is used for from this this digital information signal of record carrier regeneration.The circuit diagram that in Figure 10, replaces Fig. 2 with the 10.4 circuit square frames of representing.Therefore the terminal 60 of the transcriber of Figure 10 is equivalent to the input 60 of the demultiplex unit 62 among Fig. 2, and the output terminal 80 among Figure 10 is equivalent to the output terminal 80 of the receiver of Fig. 2.This transcriber also comprises readout device 10.2, is used for playback record at the signal of record carrier 9.8 be used to provide this signal of reading to input 60.Record carrier 9.8 can be the type of magnetic.From in this case, readout device 10.2 comprises one or more magnetic head 10.6, is used for reading this information from the magnetic track of reading carrier 9.8.In another embodiment, record carrier 9.8 is record carriers of light.At this moment readout device 10.2 comprises the reading head of a light, and the magnetic track that is used for from the record carrier is read this information.Usually, before further handling described signal, the signal of reading from record carrier is a channel-decoding.According to the embodiment of this receiver, readout device 10.2 comprises a channel-decoding unit, is used for the signal that channel-decoding is read from this record carrier.
Figure 11 represents another embodiment with the transmitter of device form, is used for this digital information signal of record on the record carrier of light.The transmitter of Figure 11 and the transmitter of Fig. 1 are expressed big similarity.The record carrier of light replaces this transmission medium.Signal combination unit 24 among Fig. 1 comprises first writing unit 11.2 and second writing unit 11.4.First writing unit 11.2 is applied to receive by separative element 8 and provides to the P bit PCM signal of its input and write P bit PCM signal in first channel of this record carrier.So the record carrier that obtains preferably with the audio frequency CD compatibility of standard, so P bit PCM signal can be regenerated by the CD Player of routine.The value of P preferably equals 16 in this case.First channel is to be formed by the detectable sign of the light in the magnetic track in this case, so the detectable sign of light is the form of so-called groove (pit).Second writing unit 11.4 is applied to finally receive the difference signal that is provided by separative element 14 by data compression unit 16, and if so data compression, in the second channel of record carrier CD, write this difference signal.Second channel can the crosscut track direction the variation of detectable sign of light write, such as the variation of sign width.At USP 5,724, the embodiment of some second channels is disclosed in 327.Described file discloses the change in location of the magnetic track on the record carrier, the variation of the width of the groove in the magnetic track or the variation of the degree of depth or data recovered clock frequency.
To be it produce record carrier according to current CD standard to the advantage of this embodiment, CD for example, and it can be used for the CD replay device, so that the low-qualityer P bit PCM signal of regeneration expression M bit PCM digital information signal.Even present available CD recording unit only can be read first passage.Duplicate the data that only comprise in the first passage by described CD recording unit, therefore have only the inferior quality of M bit PCM digital information signal to represent.The embodiment of this transmitter provides has the anti-record carrier that duplicates, and is used to duplicate high definition M bit PCM signal.
Randomly, first writing unit 11.2 can be applied to insert in the P bit PCM signal of first in the first passage of write recording carrier of difference signal, if so data compression.This insertion can use the data technique of imbedding to carry out.In this case, second writing unit is applied to write the remainder of difference signal in the second channel of this record carrier.This is optional to increase data capacity on the record carrier that is used to transmit this difference signal.
Figure 12 represents another embodiment with the receiver of device form, is used for regeneration and writes on M bit PCM signal on the record carrier.The receiver sheet of Figure 12 illustrates the similarity big with the receiver of Fig. 2.Demultiplex unit 62 comprise first sensing element 12.2 and second sensing element 12.4.The data that first sensing element 12.2 is read the first passage of write recording carrier are so that obtain to write the P bit PCM signal of first passage and first input 68 of described P bit PCM signal to signal synthesis unit 70 is provided.Described first passage is preferably with the channel form of the N bit PCM signal that transmits standard CD, so N=16.Second sensing element 12.4 is read the data of second channel of write recording carrier so that obtain difference signal, if so data compression is used to offer second input 76 of signal combination unit 70.If second channel comprises the data compression difference signal, the expansion before second input 76 that offers signal synthesis unit 70 of described compressed signal.The embodiment of described second channel provides.
Randomly, if so data compression, in the signal that first sensing element can be applied to read from the first passage of record carrier CD, the first that for example uses the data technique imbedded to read difference signal.Second sensing element 12.4 is applied to read the remainder of difference signal from the second channel of this record carrier in this case.If so data compression, second sensing element also is applied to make up first and remainder, so that obtain difference signal.
Though described the present invention with reference to its preferred embodiment, it should be understood that these are not the examples that limits.Therefore under the scope of the present invention that does not break away from by the claim definition, various modifications have become obviously to those skilled in the art.As an example, if so data compression, difference signal can be separated into first and remainder, and first can be stored in the data channel of imbedding, and remainder for example can be stored in merging bit or this user's bit.Utilize the present invention can easily realize anti-duplicating.Therefore, difference signal can with the key scramble.The signal of scramble can be inserted in the data-signal of imbedding and be stored in the first passage of record carrier, and scrambling key is stored in the second channel of record carrier.By doing like this, at this moment can read and duplicate the signal of scramble, but key can not be read thereby reproducible not with the dat recorder device.The record carrier that duplicates transmits scrambling signal, but does not transmit scrambling key.Owing to lose described scrambling key, can not transmit the scrambling signal of difference signal by descrambling according to transcriber of the present invention, so regenerated signal, the digital information signal of the better quality of the M bit PCM of can not regenerating, the P bit PCM signal of reading then.
In addition, difference signal can be scalable signal.This has advantage: this digital information signal can utilize the receiver with different complicacy to be retrieved from transmission signals.The complicacy of the device of retrieval difference signal is determined the quality of reproducing digital information signal.For example, if send the difference signal of data compression, the some parts of described numeral can not use more uncomplicated demoder to produce difference signal.This will finally produce the numerical information of the regeneration with signal quality lower than the signal quality of original M digital bit information signal.
Word ' comprises ' does not get rid of other unit or the step that exists listing in right requires.Any reference marker does not limit the scope of claim.The present invention can utilize the two realization of hardware and software.Several means can be provided by identical item of hardware.The present invention has the combination of each novel characteristic or characteristic in addition.
Claims (29)
1. be used for sending by transmission medium the transmitter of the digital information signal with M bit PCM samples, this transmitter comprises:
-input media is used to receive M bit PCM signal;
-tripping device is used for separating M bit PCM signal and the difference signal of the difference between M bit PCM signal and the P bit PCM signal, the wherein M＞P of the expression of the digital information signal with P bit PCM samples;
-the first signal combination device is used to make up P bit PCM signal and this difference signal, so that obtain the transmission signals by some transmission medium.
2. according to the transmitter of claim 1, it is characterized in that providing data compression device, be used for this difference signal of data compression, so that obtain the difference signal of data compression, first signal combination device is applied to make up the difference signal of P bit PCM signal and data compression, so that obtain the described transmission signals by some transmission medium.
3. according to the transmitter of claim 1 or 2, it is characterized in that first signal combination device is applied to obtain transmission signals, this transmission signals comprises it being the N bit PCM signal of P bit PCM signal version, N＞P.
4. according to claim 1,2 or 3 transmitter, it is characterized in that it is the P highest significant position (MSB) of described M bit PCM signal that this tripping device is applied to M bit PCM Signal Separation, so that obtain the M-P least significant bit (LSB) of P bit PCM signal and described M bit PCM signal, so that obtain difference signal.
5. according to the transmitter of claim 3 or 4, N＞P wherein is characterized in that this signal combination device is applied to insert at least a portion difference signal (if so data compression) in the N-P least significant bit (LSB) of N bit PCM signal.
6. according to the transmitter of any claim of front, it is characterized in that first signal combination device is applied to insert in the data channel of imbedding of at least a portion difference signal (if so data compression) in the P bit signal, so that obtain described transmission signals by some transmission medium.
7. according to the transmitter of any claim of claim 2 to 6, it is characterized in that this data compression device comprises the scrambler of a tonequality, therefore the scrambler of this tonequality is suitable for according to this this difference signal of digital information signal data compression, so that obtain the difference signal of data compression.
8. according to the transmitter of any claim of claim 2 to 6, wherein this data compression device comprises the entropy coding device.
9. transmitter according to Claim 8, wherein said entropy coding device is the form with the Huffman scrambler.
10. according to the transmitter of any claim of front, this transmitter is the form with device, is used for this digital information signal of record on record carrier.
11. the transmitter according to any claim of front is characterized in that this transmitter also comprises channel coding device, is used for this transmission signals of chnnel coding before transmission.
12. utilize record carrier according to the transmitter acquisition of claim 10 or 11.
13. according to the record carrier of claim 12, wherein this record carrier be light or the magnetic recording type.
14. be used for receiving transmission signals that transmits digital information signal and the receiver that produces Q bit PCM signal thus from transmission medium, described Q bit PCM signal is the expression of described digital information signal, this receiver comprises:
Be used for from the indexing unit of this this transmission signals of transmission medium retrieval,
Be used for deriving the multichannel decomposer that the P bit PCM of this digital information signal and difference signal is represented from this transmission signals,
Signal combination device is used to make up P bit PCM signal and difference signal so that obtain Q bit PCM signal, Q＞P,
Be used to provide the output unit of Q bit PCM signal.
15. according to the receiver of claim 14, this multichannel decomposer is applied to the compressed difference signal of retrieve data from this transmission signals, this receiver is also equipped the data expanding unit, so that obtain the difference signal of data expansion.
16., it is characterized in that this multichannel decomposer is applied to extract the P bit PCM and represents N 〉=P from the N bit of digital information signal is represented according to the receiver of claim 14 or 15.
17. according to the receiver of claim 16, wherein N＞P is characterized in that this multichannel decomposer is applied to extract the N-P least significant bit (LSB) of N bit PCM signal, so that obtain at least a portion (if so, data compression) of this difference signal.
18., it is characterized in that this multichannel decomposer is applied at least a portion of this difference signal of retrieval in the data channel of imbedding from P bit PCM signal (if so, data compression) according to the receiver of claim 15,16 or 17.
19. according to the receiver of any claim of claim 15 to 18, wherein this data expanding unit comprises the decoding device of tonequality.
20. according to the receiver of any claim of claim 15 to 18, wherein this data expanding unit comprises the entropy decoding device.
21. according to the receiver of claim 20, wherein said entropy decoding device comprises a Huffman demoder.
22., it is characterized in that it also is included between this indexing unit and this multichannel decomposer and is furnished with channel decoding device according to the receiver of any one claim of claim 14 to 21.
23. be used for sending by transmission medium the method for the digital information signal with M bit PCM samples, the method comprising the steps of:
Receive M bit PCM signal;
Separation is the M bit PCM signal in the P bit PCM signal of expression of M bit PCM signal and is the difference signal of the difference between M bit PCM signal and the P bit PCM signal, wherein M＞P;
Combination P bit PCM signal and this difference signal are so that acquisition is by the transmission signals of some transmission medium.
24. method according to claim 23, it is characterized in that this method also comprises this difference signal of data compression so that obtain the step of the difference signal of data compression, wherein this combination step is applied to make up the difference signal of P bit PCM signal and data compression, so that obtain the described transmission signals by some transmission medium.
25. according to the method for claim 23 or 24, it is characterized in that this combination step obtains a transmission signals, this transmission signals includes the N bit PCM signal of P bit PCM signal version, wherein N 〉=P.
26. according to claim 23,24 or 25 method, it is characterized in that this separating step separates the P highest significant position (MSB) that M bit PCM signal becomes described M bit PCM signal, so that obtain P bit PCM signal, with separate M bit PCM signal and become M-P least significant bit (LSB) (LSB) so that obtain this difference signal.
27. method according to claim 25 or 26, N＞P wherein, it is characterized in that this combination step inserts at least a portion difference signal (if so data compression) in the N-P least significant bit (LSB) of N bit PCM signal, so that obtain described transmission signals by this some transmission medium.
28., it is characterized in that in the data channel of imbedding of difference signal (if so, data compression) in P bit PCM signal of this combination step insertion at least a portion, so that obtain this transmission signals according to the method for claim 23 to 27.
29., it is characterized in that this data compression step comprises according to this digital information signal tonequality to encode this difference signal so that obtain the step of the difference signal of data compression according to the method for any claim of claim 24 to 28.
Applications Claiming Priority (2)
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| EP99202633 | 1999-08-13 | ||
| EP99202633.6 | 1999-08-13 |
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| CN1310238C CN1310238C (en) | 2007-04-11 |
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| CNB008021929A Expired - Fee Related CN1310238C (en) | 1999-08-13 | 2000-07-24 | Transmission of a digital information signal having M bit PCM samples |
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| EP (1) | EP1119854A1 (en) |
| JP (1) | JP2003507913A (en) |
| KR (1) | KR20010087370A (en) |
| CN (1) | CN1310238C (en) |
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| PL (1) | PL347188A1 (en) |
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| TR (1) | TR200101073T1 (en) |
| TW (1) | TW501099B (en) |
| WO (1) | WO2001013375A1 (en) |
| ZA (1) | ZA200103079B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101046961B (en) * | 2006-03-31 | 2011-10-12 | 北京希格玛和芯微电子技术有限公司 | Speech compression, decompression method and circuit based on wave shape |
| CN101828221B (en) * | 2007-08-16 | 2012-11-07 | 韩国电子通信研究院 | Apparatus and method for encoding and decoding enhancement layer |
| CN101796579B (en) * | 2007-07-06 | 2014-12-10 | 法国电信公司 | Hierarchical coding of digital audio signals |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101283249B (en) * | 2005-10-05 | 2013-12-04 | Lg电子株式会社 | Method and apparatus for signal processing and encoding and decoding method, and apparatus thereof |
| JP4784653B2 (en) * | 2009-01-23 | 2011-10-05 | ソニー株式会社 | Audio data transmitting apparatus, audio data transmitting method, audio data receiving apparatus, and audio data receiving method |
| RU2447492C1 (en) * | 2011-03-14 | 2012-04-10 | Федеральное государственное унитарное предприятие "Специальное научно-производственное объединение "Элерон" (ФГУП "СНПО "Элерон") | Method for digital information transmission |
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| CA2110182C (en) * | 1991-05-29 | 2005-07-05 | Keith O. Johnson | Electronic signal encoding and decoding |
| JP3373221B2 (en) * | 1992-03-04 | 2003-02-04 | パイオニアビデオ株式会社 | Digital audio signal recording and playback device |
| US5451942A (en) * | 1994-02-04 | 1995-09-19 | Digital Theater Systems, L.P. | Method and apparatus for multiplexed encoding of digital audio information onto a digital audio storage medium |
| JP3969762B2 (en) * | 1996-03-18 | 2007-09-05 | パイオニア株式会社 | Information recording medium, recording apparatus and method thereof, and reproducing apparatus and method thereof |
| JP3496411B2 (en) * | 1996-10-30 | 2004-02-09 | ソニー株式会社 | Information encoding method and decoding device |
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2000
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- 2000-07-24 ID IDW20010835A patent/ID29080A/en unknown
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101046961B (en) * | 2006-03-31 | 2011-10-12 | 北京希格玛和芯微电子技术有限公司 | Speech compression, decompression method and circuit based on wave shape |
| CN101796579B (en) * | 2007-07-06 | 2014-12-10 | 法国电信公司 | Hierarchical coding of digital audio signals |
| CN101828221B (en) * | 2007-08-16 | 2012-11-07 | 韩国电子通信研究院 | Apparatus and method for encoding and decoding enhancement layer |
Also Published As
| Publication number | Publication date |
|---|---|
| MY127901A (en) | 2006-12-29 |
| KR20010087370A (en) | 2001-09-15 |
| AU775494B2 (en) | 2004-08-05 |
| EG22673A (en) | 2003-06-30 |
| JP2003507913A (en) | 2003-02-25 |
| TR200101073T1 (en) | 2001-08-21 |
| TW501099B (en) | 2002-09-01 |
| AU6438300A (en) | 2001-03-13 |
| ZA200103079B (en) | 2002-07-12 |
| IL142540A0 (en) | 2002-03-10 |
| PL347188A1 (en) | 2002-03-25 |
| ID29080A (en) | 2001-07-26 |
| WO2001013375A1 (en) | 2001-02-22 |
| EP1119854A1 (en) | 2001-08-01 |
| AR025228A1 (en) | 2002-11-13 |
| HK1040314A1 (en) | 2002-05-31 |
| RU2267171C2 (en) | 2005-12-27 |
| CZ20011291A3 (en) | 2001-08-15 |
| BR0007009A (en) | 2001-07-10 |
| CN1310238C (en) | 2007-04-11 |
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