TW501099B - Transmission of a digital information signal having M bit PCM samples - Google Patents

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

V. Description of the invention (1) The present invention is about the digital data of a sample of reading and crying code modulation; Lu and Da have M-bit PCM (the pulse wave is compiled from the transmission media and carries VI.) The signal generates a shipping signal of the Q-bit PCM Hδ number and an information signal therefrom. When the present invention uses a 1-bit, the bit PCM signal represents the digital information: together with the record carrier provided by the transmitter, and about a Sending method. ^ Ϊ́ 之 The transmitter defined by $ can be found in USP 5, 479 1 68. This document wishes to indicate a kind of signal master, ', 此 This digital information 达 2 cat χ reaches and decodes to provide Samples of M-bits Ϊ; a modified version of the seed is harvested, together with the solution that has the solution of the formula I, and is compatible with the same date but does not include the decoding ^, ^ receiver of the present invention, the signal is analyzed and Part 2 = To; the transmitter controls the digital information through a transmission medium. = To the modified version of the digital poor signal and n ^ am μ ^ 1. The control code and digital information signal will be affected. The digital poor signal will be touched. Implemented code! And reconstructed digital information signal = receive The transmission of the bit-suppressing element and the present;% γ &quot; Xiang Fen, the quality of this digital information signal is better than the quality of the signal reproduced by _Industrial Standardization Playback Device. "According to the invention by the industry The transmitter includes: an input device for receiving the M-bit PCM signal; a segmentation device for receiving a digital information signal representing a p-bit PCM sample;

Page 5 501099 5. Description of the invention (2) The M-bit PCM signal is separated from a differential signal, which is the difference between the% -bit PCM signal and the P-bit PCM signal, where M &gt;ρ;-第A signal combining device is used to combine the P-bit PCM signal with the difference signal, so as to obtain a # symbol for transmission via a transmission medium. The receiver according to the invention comprises-a retrieval device for retrieving a transmission signal obtained from a transmission medium,-a demultiplexing device for deriving a P-bit PCM signal representing a digital information signal and a difference signal from the transmission signal,-a signal combination The device is used to combine a P-bit PCM signal and a difference signal to obtain a Q-bit PCM signal, where Q &gt; p. The present invention is based on the following knowledge. The transmitter according to the present invention divides a digital information signal having M-bit PCM samples into a representative signal and a difference signal of the digital information signal having p-bit pCM samples. The representative signals of the digital information signal and the difference signal are combined to obtain a transmission signal to be transmitted. The transmission signal is transmitted via a transmission medium. According to a preferred embodiment of the transmitter, the first signal combining device is adapted to obtain a transmission signal including an N-bit PCM signal. The transmission signal is a P-bit PCM signal and therefore N ^ P. An advantage of this specific example ^ The transmission number obtained in this way can be received and processed by a receiver of the prior art, which can receive and process and output an N-bit PCM signal. To carry differential signals The required data capacity is generally small. It is even possible to apply negative material compression to this difference in order to further reduce the required data capacity. Therefore, the transmitter should preferably be equipped with a data compression device in order to reduce Transport

Page 6 501099

Data capacity required to carry differential signals. The data compressing device preferably includes an audio encoder, which eliminates the irrelevance, weight, and care of the difference signals. For the cutting operation, the M-bit PCM samples of the digital information signal can be divided into p most significant bits to obtain the p-bit PCM signal, and M-P least significant bits to obtain the differential signal. In the case of p &lt; N, the least significant bit of N-p can be used to store at least a part of the difference signal, and this part can be data compressed. The embedded data technique may be used to determine one of the P-bit PCM signals to embed the data channel to carry at least a portion of the differential signal. By using embedded data technology, the perceived S / N ratio of the transmitted N-bit PCM signal is about the same as the S / N ratio of the p-bit PCM signal. The receiver according to the present invention can retrieve the transmitted two signal components and reproduce the reproduction information of the M-bit PCM digital information from the two components. These and other objects of the present invention will become clear and easy to understand by referring to the specific embodiments in the following description of the drawings. In the drawings, FIG. 1 shows a first specific example of a transmitter, and FIG. 2 shows a receiver. First specific example, FIG. 3 shows a prior art receiver for receiving a transmission signal generated by the transmitter of FIG. 1, and FIG. 4 shows a first specific example of a split device of the transmitter, and FIG. 5 shows the first example of FIG. The third specific example of the signal combining unit in the transmitter, FIG. 6 shows the third specific example of the demultiplexing unit in the receiver of FIG. 2,

Page 7 501099 5. Description of the invention (4) FIG. 7 shows a fourth specific example of the signal combining unit in the transmitter of FIG. 1, FIG. 8 shows a fourth specific example of the demultiplexing unit in the receiver of FIG. 2, and FIG. 9 Shows a transmitter in the form of a recording device, and FIG. 10 shows a receiver in the form of a copying device, FIG. 11 shows another specific example of a transmitter in the form of a recording device, and FIG. 12 shows a form of a copying device One specific example of a receiver.

Figure 1 shows a specific example of the transmitter. The transmitter has an input terminal 1 for receiving a digital information signal such as a digital audio signal having one M-bit PCM sample. This digital information can be obtained by supplying an analog version of the digital information signal to one of the inputs 2 of a converter 4. A / D converter 4 samples the signal applied to its input 2 and supplies digitized M-bit samples to input 1 of the transmitter. The input terminal 1 is coupled to one of the inputs 6 of the division unit 8. The segmentation unit is adapted to separate the M-bit PCM signal added to its input into a p-bit pCM representing one of the digital information signals with μ-bit PCM samples, where p &lt; M, and a difference signal. This difference The signal is obtained by subtracting the p-bit PCM signal from its input 6-bit PCM signal earlier. The p-bit pCM signal and the difference signal are respectively supplied to the first output 10 and the second output of the segmentation unit 8. For example, M can be selected to be equal to 24 and P to be equal to 16, so the information captured by it can be used as a standard signal Stored on, for example, a standard cd. -One of the outputs 8 of the split early 8 is coupled to one of the first inputs 资料 of the data compression unit 16. This data compression unit is optional. You do not need the 'data' unit to discriminate the difference letter it received in the _th round of people == 501099 V. Description of the invention (5) Compression so as to obtain the information that needs to be supplied to its output 18. The difference between data compression. The output 10 of the division unit 8 is coupled to the first input 22 of the signal combining unit 24. An output 18 of the data compression unit 16 is coupled to a second input 26 of the signal combining unit 24. The signal combining unit 24 combines the signals supplied to its inputs 22 and 26 into a serial data stream 'which is suitable for transmission via the transmission medium TRM. This signal combining step in the combining unit 24 may include a channel coding step which is well known in the art of this line. The data compression unit 16 may include a standard arithmetic encoder, such as a Huffmann encoder known in the art. The segmentation unit 8 performs a quantization step to obtain a P-bit PCM signal. Quantization noise in p-bit PCm signals can cause quantization noise in differential signals. This is why differential signals are almost white-packed. In order to improve data compression, Unit 6 can include a psychoacoustic model that is well known in the industry. Therefore, the data compression unit 16 is configured with a second input 20 coupled to one of the input terminals 1 to receive a μ-bit digital information signal. This improvement can be used to reduce the data capacity for carrying differential signals or increase the perceived signal-to-noise ratio that can be obtained by a receiver with the features of the present invention.

The above-mentioned transmitter exerts its performance in the following manner, and a digital information signal is supplied to the input terminal 1. The segmentation unit divides the digital information with M-bit pcm samples into a P-bit PCM signal and a difference signal. The pc signal is a representative of low signal quality of a digital lean signal. The differential signal includes signal information obtained from the M-bit PCM signal required for the receiving side, so as to copy the combination of the p-bit PCM signal and the differential signal in the form of an M-bit PCM signal.

501099

, A high-quality representative of information signals. These p-bit pcM signals and differential signals, if they are subjected to data compression in this way, are combined to obtain a transmission signal for transmission via a transmission medium TRM. The transmitted signal carries a p-bit PCM signal, so a receiver that does not include the features of the present invention can reproduce this number. The transmission medium TRM can be a broadcast channel or a record carrier, such as a magnetic or optical record carrier. The transmission signal is transmitted to a receiver via a transmission medium TRM.

FIG. 2 shows a specific example of a receiver for receiving a transmission signal and copying the original digital information signal from the # symbol. ^ Send #TRM is received via input 60 of the demultiplexing unit β2. The demultiplexing unit 62 retrieves the p-bit pcM signal from the transmitted signal and supplies this signal to a first input μ of a detection number combining unit 70.

Another output 66 of the demultiplexing unit 62 is coupled to an input 72 of the data expansion unit 74. The demultiplexing unit 62 is capable of capturing a difference signal from the transmitted signal and supplying the # number known to this capture to the output 66, which is coupled to one of the second inputs 76 of the signal combining unit 70. The signal combining unit 70 will combine the "signs" received at its first and second input locations, so as to obtain the original digital information signal bit PCM copy. One output 78 of the signal combining unit 70 is coupled to one output of the receiver. 80, if necessary, via a D / A converter 82. This receiver can also be equipped with a second D / A converter (not shown), this converter has an input coupled to the demultiplexing unit 62 The output is 64 and one output is coupled to the other output (not shown). The receiver in Figure 2 operates in the following way. Demultiplexer unit check

501099 5. Description of the invention (7)

This 4a number is one of the sent signal P bit PCM number and the digital information that supplies this signal at output 6 &amp; k number represents a lower signal quality

The demultiplexer unit 62 is also able to retrieve the difference between the data given in this regard and supply this signal to the output 66. If necessary, the data expansion sheet _ retrieves the differential signal compressed by data at input 72, expands this signal to obtain a differential signal, and supplies the differential signal to the signal combination unit. The second input 76 is. One quasi-bit represents the M-bit pcM digital corruption signal in the P-bit PCM signal and the quantization noise that is not introduced by the dividing unit in the transmitter. The data expansion unit 84 may include a psychoacoustic A decoder (this is a lossy decoder), or an average information decoder (this is a lossless decoder), such as a Huffman decoder and a decoder. This special decoder is well known in the industry. The signal combining unit 7 combines the p-bit tgPCM signal with the difference signal to obtain a Q-bit PCM signal that is a duplicated signal of the original digital information signal, and supplies this Q-bit PCM to its output 78. The value of Q and The data expansion unit 84 used is related. Depending on the complexity of the data expansion unit 84, the data expansion unit can reconstruct a higher-quality signal. The q-bit pCM signal generated by the signal combination unit The value is related to the signal quality of the reconstructed differential signal received at input 76. In order to produce a copy signal better than the signal quality of the p-bit PCM signal, the value of at least Q needs to be increased. Therefore, q &P; P. A converter 82 may be provided to convert the copied signal of the digital information signal into an analog signal. Fig. 4 shows a specific example of the division unit in the transmitter of Fig. 1. The input 6 of the division unit 8 receives a sample of μ bits pc Μ Digital information signal. The quantizer 4.2 performs quantization on the M-bit PCM so as to obtain P which represents the digital information signal.

Page 11 V. Description of the invention (8) The letter PMPMiHf is supplied to the output 10 of the division unit 8. The centrifugalization step V can be a general rounding or truncation function, but any basin == is applicable. This includes noise shaping and high-frequency vibration. The division bit opening ρπμΛ ^ and a subtraction unit 4 · 4 are used to subtract P σσ. ΣI from the M-bit PCM signal to obtain a difference signal. This difference signal is supplied to the subcontract

Out of 12. The segmentation unit can also be adapted to implement the truncation function by supplying the P of the M-bit PCM sample with a large significant bit to the output 10 and an M-P minimum significant bit to the output 12.芏 Roll out &gt; The implementation of the transmitter is preferably compatible with an industry standard signal reproduction device such as a CD player. Therefore, the signal combining unit 24 is adapted to generate a transmission signal having an N-bit PCM signal. To be compatible with the ⑶ standard, N should be equal to 16. Therefore, a better implementation of the division unit 8 is to supply a meta PCM signal, so p. One of the prior art receivers shown in FIG. 3 is configured with a demultiplexing unit 62 ', which can retrieve the p-bits representing the digital information signal with N-bit samples from the transmission signal sent via the transmission medium TRM. N-bit PCM signal representing the signal. The receiver has a D / a converter 82, so that an analog signal representing a digital 孔 hole # can be transmitted to the output 8 4. In prior art receivers, a D / A converter with a small dynamic range is sufficient.

Special N &lt; M. One of the first specific examples of the signal combining unit 24 can be used in the case of P &lt; N. This signal combining unit receives a P-bit PCM signal at its input 22. The P-bit PCM signal samples are used to generate p-maximum significant bit samples from the N-bit pCM signal in the transmitted signal. Least Significant N-P Bit in N-Bit PCM Signal

Page 12 501099 5. Description of the invention (9) is used to carry at least part of the differential signal. If this signal is subjected to data compression, it is received at the second input 26 of the signal combining unit 24. A prior art receiver will replicate an N-bit PCM signal with a P-bit PCM signal, which is a lower quality copy signal of a digital information signal. The N-P least significant bit of the N-bit PCM signal will be copied as the low signal noise added to the P-bit PCM signal. When the N-bit PCM signal has a small amplitude, this low signal noise can be heard.

The first specific example of the demultiplexing unit 62 in the receiver of Fig. 2 is adapted to receive a transmission signal having an N-bit PCM signal. The demultiplexing unit selects the largest effective p bit from the n-bit PCM signal in order to obtain a p-bit pCM signal for supply to output 64. In addition, the demultiplexing unit selects the N-P least significant bit from the n-bit pcm signal in order to obtain a differential signal. If this signal is thus subjected to data compression, it is supplied to the output 6 6. According to specific examples of the signal combining unit 24 in the transmitter in FIG. 1 and the demultiplexing unit 62 in the receiver in FIG. 2, these units are adapted to transmit and receive one of the N-bit PCM signals respectively. Transmit the signal, n is equal to P 08 '' One of the second specific example of the signal combination unit 24 in the transmitter of FIG. 1 is to use the embedded data technology well known in the technology of this bank to dream pp ◦ μ The difference signal is combined and then subjected to data compression in order to obtain the = sign. The buried data channel is used to carry differential signals. The signal transmitted by the receiver according to the prior art reproduces the representative signal of the digital signal with the embedded data channel, but the data in the embedded data channel is now not perceptual. The second duplex unit 62 in the receiver of FIG. 2

501099 V. Description of the invention (ίο) It is suitable to derive the P-bit PCM signal with the embedded data channel from the embedded data channel in the P-bit PCM signal and to derive the differential signal if the data is compressed. FIG. 5 shows a third specific example of the signal combining unit 24 in the transmitter of FIG. A channel modulation unit 5.2 receives the P-bit PCM signal received at the first input 22 of the signal combining unit 24, and processes the combined signal to obtain a sequence of m-bit channel words. Preferably, the channel modulation unit includes an n-m channel modulator. A generator unit 5.4 receives the difference signal received at the second input 26 of the signal combining unit 24 and generates a P merge bit in response to the remaining part. One unit 5 · 6 receives the m-bit channel word order _ column and the P-merged bit and inserts the P-merged bit between adjacent m-bit channel words in order to obtain the transmission signal and supply the transmission signal to the signal combination unit 2 4 The output 28 is used for transmission via the transmission medium TRM32. The p-combination bit is generally used to prevent violations of restrictions between (d, k) adjacent channel words and is used as an additional DC control task. After completing this task, there is still the ability to select one or more of these merged bits in response to the information content of the difference signal. The generator unit that generates the merge bit uses this ability. FIG. 6 shows a third specific example of the demultiplexing unit 62 in the receiver of FIG. One unit β · 2 receives a transmission signal supplied to the input 60 of the demultiplexing unit 62. The transmitted signal consists of a sequence of m-bit channel words along with each adjacent one !! P merges the bit channel words between bit channel words. Unit 6.2 divides this transmission signal into a sequence of 111-bit 0-channel words and the p-merged bits. The m-bit channel word sequence is supplied to a channel demodulation unit 6.4. The better implementation of this unit is to change the m-n channel 'to obtain a representative signal of the digital information signal. Has p bits

501099 5. Description of the invention (11) A representative signal in the form of a standard digital stereo signal, such as f, is supplied to the output 64. The P-merged bit is supplied to the processing unit 6.6, which is arranged to process the P-merged bit to obtain a difference signal. If this signal is compressed by the data, it is used to supply the output terminal 6 6. FIG. 7 shows a fourth specific example of the signal combining unit 24 in the transmitter of FIG. A processing unit t17 · 2 receives the P-bit tgPCM signal received at the input 22 of the signal combining unit 24, and processes the p-bit pcM to obtain a sequence of q-bit chunks. The processing unit may include an interleaved Reed-Solomon encoder. The value of q is 32 for the standard CD formula. One sub = code encoder 7.4 receives the difference signal supplied to its input if it has undergone data compression, and generates one] in response to the difference signal: byte subcode. The subcode of the standard CD format is mainly an auxiliary data stream. The wide-bit subcode is, for example, at least one bit of a U-subcode. A unit 76 receives the q-bit sequence and the r-bit subcode, and inserts the r-bit subcode into an adjacent m-bit channel word to obtain a signal that will be written on the record carrier. For better implementation, before sending the signal on the transmission medium in the form of a record carrier, this signal is displayed by the EFM encoder in FIG. 8 through the fourth demultiplexing unit 62 in the receiver of FIG. Specific example 'A unit 8.2 receives a transmission signal supplied to the input 60 of the demultiplexing unit 6. The transmission signal includes a sequence of q-bit blocks together with a block between each adjacent q-bit block. "Byte subcode. Unit 8.2 divides the transmitted signal into a sequence of q byte blocks and the r byte subcodes" &quot; This separation is based on the q byte and subcode in Physical bits in the transmitted signal

501099 5. Description of the invention (12). The q-bit block is supplied to a processing unit 8.4 arranged to process this q-bit block in order to obtain a p-bit PCM signal. Processing unit 8.4 can implement and deinterleave operations. Can be a standard digital stereo signal. The processing unit 8.6 is arranged to process bit 4; at least one bit of the U self / bit / group subcode is obtained if a signal is passed therethrough. This differential signal is supplied to the demultiplexing unit 62 and transmitted in FIG. 9-2, which belongs to a form for recording digital information signals. The circuit represented by 9.2 in FIG. 2 = circuit block diagram. The input terminal 1 of the recording device of Fig. 9 is therefore the input terminal 1 of the second / second, and the terminal 28 of Fig. 9 is equivalent to the output signal at the carrier 9 8 = terminal 28 in Fig. 1 written on the record carrier 9.8. Record the cores as magnetic. In this case, the insertion device 9.4 includes one or more magnetic heads in the magnetic holder for writing information on the record carrier u. A specific example of the recording device 'recording body 9.8 is an optical record carrier. In the implementation of the writing carrier, in the first appearance, the optical recording wide head is used to write information into the optical recording. Before the recording of the road dialect, the signals to be recorded are channel coded according to the specific implementation of A.2. The writing device 9 · 4 includes a channel coding unit. Kailuan does not belong to the device for copying digital information signals from the record carrier ". The terminal 60 of the copying device of Fig. 10 is therefore equivalent to 501099 in Fig. 2

V. Explanation of the invention (13) The input 60 of the demultiplexing unit 62 and the output terminal 80 in FIG. 10 correspond to the output terminal 80 of the receiver in FIG. 2. The duplicating device further comprises a reading device 102 for reading the signal recorded on the record carrier 9.8 and supplying this read signal to the input 60. The record carrier 9.8 may be of the magnetic type. In this case, the reading device 10 · 2 includes one or more magnetic heads 10 · 6 for magnetically reading information from one of the recording carriers. According to another specific example, the record carrier 9.8 is an optical record carrier. The reading device 10 · 2 now includes an optical reading head for reading information from a track on a record carrier. In general, before further processing this signal, the signal read from the record carrier is channel decoded. According to the type of the receiver, the reading device 10 · 2 includes a channel decoding unit to decode the signal read from the record carrier by the channel. Fig. 11 shows another specific example of a transmitter which is in the form of a device for recording digital information signals on an optical record carrier. The transmitter of Figure 1 is mostly similar to the transmitter of Figure 1. An optical record carrier replaces the x-wheel, media. The signal combining unit 24 in FIG. 1 includes a first writing unit 2 and a second writing unit Π · 4. The first writing unit lh2 is adapted to receive the P-bit PCM supplied to the input thereof by the division unit 8 and write this P-bit PCM to the first channel of the record carrier. The implementation of the record carrier thus obtained is better compatible with a standard audio CD, so the P-bit PCM signal can be copied by a conventional CD player. In this case, the value of ρ is preferably equal to 16. In this case, the first channel is formed by light-detectable marks in the track. These light-detectable marks therefore belong to the so-called pit form. The second writing unit 11 · 4 is adapted to receive the difference signal supplied by the dividing unit 14 through the data compression unit 16 and will therefore pass the data.

Page 17 ^ U1099 V. Description of the Invention (14)

= The signal is written in the second channel of the record carrier CD. This second frame 2 can be directed to a variation form of a light-detectable mark in the direction of the road, that is, such a mark change is, for example, a mark width change. There are no specific examples of the second channel disclosed in the U.S. Patent Du Jie 2-7. These documents do not record changes in the position of a track on the carrier, changes in the width X or depth of the pits in the track, or changes in the clock frequency of the recovered data.

The advantage of this specific example is that it can produce, for example, available purely current CD standards: 〒: record carrier of the device CD, with a w-bit PCM signal and a low-quality representative signal. Even currently available CD recorders can only read the first channel. The reproductions recorded by these CD recorders contain only the data in the first channel, and therefore only the low-level representative of the M-bit PCM digital information signal. A specific example of the sender provides a record carrier with copy protection for copying high-resolution M-bit PCM signals.

One option is that the first writing unit 11 · 2 can be adapted to insert the first part of the differential signal if it is thus data compressed, into the P-bit PCM signal in the first channel to be written into the record carrier. This insertion can be done by using embedded data technology, in which case the second writing unit can be adapted to write the remainder of the difference 彳 5 into the second channel on the record carrier. This option increases the data capacity of the record carrier used to carry the differential signals. &amp; Fig. 12 shows another specific example of a receiver which belongs to the form of a device for reproducing the M bit p c M signal written on a record carrier. The receiver shown in Figure 12 is mostly similar to the receiver shown in Figure 2. The demultiplexing unit 62 includes a first read early element 12.2 and a first read early element 12.4. First reading unit 12 2 reading

Page 18

501099 5. Description of the invention (15) Take the data written in the first channel on the record carrier to get the P-bit PCM signal written in and supply this p-bit PCM signal to the first input of the cell 70. The implementation of this first channel is preferably a channel form carrying N-bit PCM signals, where N = 1β, unit 12.4 reads and writes the information written in a second channel on the record carrier. The difference signal is used to input a second input 76 of the number combination unit 70. If the second channel includes a reduced differential signal, the compressed signal is expanded before being supplied to the second input 76 of the signal group. This second channel has been proposed above. /. One option is that the first reading device can make it suitable for borrowing data. The first part of the differential signal read from the first channel of the record carrier CD is jealous. Second reading ^ $ This case makes it suitable to read the first part from the record carrier. The second reading unit is further adapted to group the first part in order to obtain the difference if the data is compressed accordingly. ^ Although the description has been made with reference to the preferred specific examples of the present invention, it can be understood that the specific examples and inventions The various modifications are obviously easy to understand for a familiar copy without departing from the scope of the invention of the present invention. For example, the difference signal among them can be separated into the first part and the rest of the two-compression compression: stored in the buried data channel, and the rest are in the normal or user bits. By using the first sub-a of the present invention, it is possible to easily achieve the second reading of the compound channel number of the second CD in the standard CD, to obtain the information supplied to the information via the compression unit 70. Examples of this are read in the embedded data. 1 2 · 4 other signals in the channel. Inventions are restrained. A person defined in this context may be protected by a combination of assets that can be deposited in the merger.

501099 V. Description of the invention (16) Therefore, the signal of the differential signal can be inserted into the 〆 channel, and the 2 · channel. Read from today's recording device. The signal that has been encrypted and copied according to the present invention can be de-signed by using the embedded data. The embedded data is encrypted and recorded on the record with such a key. The control device is then secretly coded, a key code is expected in the signal, and the key code is arranged in the signal. However, the key body is loaded with the plus. Since there is no such load, it cannot be added to X and the stone horse is not added. The first encrypted coded signal on the first storage record carrier that is encoded and stored on the record carrier can be read by the current code and therefore cannot be encrypted, but does not contain the key code of the encrypted code, and the root difference signal is encrypted. . Encode a high-quality copy signal of the M-bit PCM digital information signal and then read the p-bit PCM signal. The term "comprising" does not exclude the presence of other elements or steps not listed in the scope of the patent application. Any reference sign does not limit the patent application fc. The present invention can be implemented by both hardware and software. Several means can be represented by the same piece of hardware. Furthermore, the invention resides in each and every feature or combination of features.

Page 20 501099 Amendment No. 89108029 Schematic description of Schematic component symbol description 1 Input 2 m into 4 Analog to digital converter 4. 2 Quantizer 4. 4 Subtraction unit 5. 2 Channel modulation unit 5 · 4 Generate Unit 6. 6 unit 6 input 6. 2 unit 6. 4 channel demodulator unit 6. 6 processing unit 7. 2 processing unit 7. 4 sub-code stone horse maker 7. 6 unit 8 division unit 8. 2 unit 8. 4 processing unit 8. 6 processing unit 9.2 circuit block 9. 4 writing device 9. 6 magnetic head 9. 8 record carrier 10 first Wm out 10. 2 reading device 10. 4 circuit block 10. 6 magnetic head 11 · 2 First Write Unit 1 · 4 Second Write XJO Early Morning 12 Second Output 12. 2 First Read XJO —- Early 12.4 Second Reading Unit 14 First Input 16 Data Compression Unit 18 Output 20 second input 22 first m input 24 signal combination unit 26th Two in m input 28 output 32 pass ¥ m media. TRM 60 input 62 demultiplexing unit 62, demultiplexing unit 64 output 66 output «

O: \ 64 \ 64039-910502.ptc Page 21 501099 I would like to ask whether the 444 ^ fec ^ f qualitative content mentioned in the day L ‘Λ is allowed to be repaired.

Claims (1)

501099 Case No. 89108029 If Year &amp; Month Amendment VI. Patent Application Scope 1. A transmitter for transmitting a digital information signal with M-bit PCM samples via a transmission medium, the transmitter includes-an input device for receiving the M-bit PCM signal;-the segmentation device is used to separate the M-bit PCM signal representing the digital information signal with P-bit PCM samples from a difference signal, which is the difference between the M-bit PCM signal and the P-bit PCM signal Difference, where M &gt;P;-The first signal combining device is used to combine the P-bit PCM signal with the difference signal, so as to obtain a transmission signal for transmission via a transmission medium. 2. The transmitter of item 1 of the patent application scope is characterized in that the data compression device is configured to compress the differential signal in order to obtain the data-compressed differential signal. The first signal combination device is suitable for P-bit PCM. The signal is combined with a data compression signal to obtain the transmission signal for transmission via a transmission medium. 3. If the transmitter of the scope of patent application 1 or 2 is characterized in that the first signal combination device is adapted to obtain a transmission signal including one of N-bit PCM signals, this PCM signal is a P-bit PCM signal Version, where N-P. 4. If the transmitter of the scope of patent application 1 or 2, its feature is that the segmentation device is to separate the M-bit PCM signal into the P-most significant bit (MSB) of the M-bit PCM signal to obtain the P-bit. The meta-PCM signal and the M-P least significant bit (LSB) of the M-bit PCM signal are used to obtain a difference signal. 5. Transmitter as claimed in item 3 of the patent application, wherein N &gt; P, characterized in that the signal combination device is adapted to insert at least a part of the differential signal (if so, even after data compression) into the N-bit PCM signal N-P most if r: i O: \ 64 \ 64039-910502.ptc Page 23 501099 _Case No. 89108029_% Female Month 3 Amendment_ Sixth, the scope of patent application is in the small effective bits. 6. If the transmitter of claim 1 or 2, the first signal combination device is adapted to insert at least a part of the difference signal (if so, even after data compression) into the embedded data of the P-bit signal In order to obtain the transmission signal for transmission via a transmission medium. 7. The transmitter of item 2 of the patent application is characterized in that the data compression device includes a psychoacoustic encoder, which is suitable for applying data compression to differential signals such as digital information signals in order to obtain Differential signal compressed by data. 8. If the transmitter of the scope of patent application item 2, the data compression device includes an average information encoding device. 9. The transmitter according to item 8 of the scope of patent application, wherein the average information amount encoding device is in the form of a Huff man (Huffman) encoder. 10. If the transmitter of claim 1 or 2, the transmitter is in the form of a device for recording a digital information signal on a record carrier. 1 1. If the transmitter of patent application scope item 1 or 2 is characterized, the transmitter additionally includes a channel coding device for channel coding the transmission signal before transmission. 1 2. — A record carrier obtained with a transmitter such as the scope of patent application No. 10. 1 3. The record carrier according to item 12 of the patent application scope, wherein the record carrier is an optical or magnetic recording type. 1 4. A receiver for receiving a transmission signal carrying a digital information signal from a transmission medium and generating a Q-bit PCM signal from the transmission signal, O: \ 64 \ 64039-910502.ptc Page 24 501099 Case No. 89108029 Year V3 Amendment VI. Patent application scope The Q-bit PCM signal is one of the digital information signals. Used to retrieve the transmitted signal from the transmission wheel media,-The P-bit PCM representative signal and a differential signal used by the demultiplexing device to derive the digital information signal from the transmitted signal,-The signal combination device is used to combine the bit PCM signal with the difference The signals are combined to obtain a Q-bit PCM signal, where Q &gt; P,-the output device is used to supply the Q-bit PCM signal. 15. If the receiver of the scope of patent application No. 14 has a deduplexing device suitable for retrieving the differential signal compressed by data from the transmitted signal, the receiver is additionally equipped with a data expansion device to obtain the differential signal expanded by the data. 16. If the receiver of the scope of patent application No. 14 or 15 is characterized by a demultiplexing device, it is suitable for extracting the P-bit PCM representative signal from the N-bit representative signal of the digital information signal, where N2P . 17. The receiver of item 16 in the scope of patent application, where N &gt; P, is characterized in that the duplexing device is adapted to extract the NP least significant bit PCM signal of the N-bit PCM signal in order to obtain at least Part of the differential signal (if so, even after data compression). 1 8. If the receiver of the scope of patent application No. 15 is characterized in that the demultiplexing device is adapted to retrieve at least a part of the difference signal from an embedded data channel in one of the P-bit PCM signals (if so, even if Data compression). 19. The receiver according to item 15 of the scope of patent application, wherein the data expansion device includes a psychoacoustic decoding device. O: \ 64 \ 64039-910502.ptc Page 25 501099 Case No. 89108029 Amendment VI. Patent application scope 2 0. If the receiver of patent application scope item 15 is used, the data expansion device includes the average information amount decoding Device. 2 1. The receiver of claim 20 in the scope of patent application, wherein the average information decoding device includes a Huffman decoder. 2 2. If the receiver in the scope of patent application No. 14 or 15 is characterized, it additionally includes a channel decoding device suitable for a retrieval device and a de-duplex device. 2 3. —A method for transmitting a digital information signal with M-bit PCM samples via a transmission medium. The transmitter includes the following steps:-receiving the M-bit PCM signal;-dividing the M-bit PCM signal into representative M bits P-bit PCM signal and a difference signal of the meta-PCM signal, the difference signal is the difference between the M-bit PCM signal and the P-bit PCM signal, where M &gt;P;-the P-bit PCM signal and the difference signal Combined to obtain a transmission signal for transmission via a transmission medium. 2 4. The method according to item 23 of the scope of patent application, which is characterized in that the method additionally includes data compression for the differential signal in order to obtain the data-compressed differential signal, and the signal combination step in it is suitable for the P bit The PCM signal is combined with the data-compressed differential signal in order to obtain the transmission signal for transmission via a transmission medium. 25. The method according to item 23 or 24 of the patent application scope is characterized in that the combination step results in a transmission signal including one of the N-bit PCM signals, which is a version of the P-bit PCM signals, where N- P. 2 6. If the method of the scope of patent application No. 23 or 24 is characterized by division O: \ 64 \ 64039-910502.ptc Page 26 501099 pi κ 1 _Case No. 891Q8029_Year Month and Revision_ VI. Patent Application Procedures Steps to divide the M-bit PCM signal into the maximum p of the M-bit PCM signal Bits (MSB) to obtain P-bit PCM signals, and M-P Least Significant Bits (LSB) to obtain differential signals. 27. The method according to item 25 of the patent application scope, wherein N &gt; P, is characterized in that the combination step inserts at least a part of the difference signal (if so, even after data compression) into the N-bit PCM signal with the smallest NP Valid bits in order to obtain the transmission signal for transmission via a transmission medium. 28. If the method according to item 23 or 24 of the patent application scope is characterized by a combination step of inserting at least a part of the difference signal (if so, even after data compression) into the embedded data channel of the P-bit PCM signal In order to get the signal. 29. The method according to item 24 of the scope of patent application is characterized by data compression. The steps include psychologically encoding the difference signal, such as a digital information signal, in order to obtain the data-compressed difference signal. O: \ 64 \ 64039-910502.ptc Page 27