JPH09307448A - Encoder, decoder and encoding information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an error of a high frequency component by generating an interpolation data from accurate sampling data of twice or over in the reproduction for sampling twice or over so as to decode and reproduce compressed audio data. SOLUTION: An input signal is given to an A/D converter 2, in which the signal is converted into a digital signal at a uni-fold sampling frequency from a clock signal generator 5 and sampling data xa1, xa2,...xai,... are obtained from the output of the A/D converter 2. Simultaneously an input signal is given to an A/D converter 3, in which the signal is converted into a digital signal at a double sampling frequency from the clock signal generator 5 and sampling data xb1, xb2,...xbi,... are obtained from an output of the A/D converter 3. A switch 4 is used to select the data xb1, xb2,...xbi,... to obtain a difference Δi. A packing encoder 7 is inputted with the uni-fold sampling data xai and the difference data Δi, in which they are packing-processed and the result is outputted to an output terminal 8.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an encoding device,
The present invention relates to a decoding device and an encoded information recorded medium, and more particularly to a device and a recording medium used for performing data compression to record data on a carrier, that is, a recording medium, and for decompressing data during reproduction.

[0002]

C as an optical disk for audio reproduction
It has been ten years since D (Compact Disc) was put on the market, and it has already been remarkably popular as a recording medium for audio information, surpassing conventional cassette tapes. The physical / logical format of a digital disc, CD, has been established as an EFM modulation recording method of 8-bit fixed data length symbol and a data format method of subcode, audio data, CRC, etc., and various application functions are added. CD players have been developed.

A CD is also used as a CD-ROM for data by identifying it by the control bit (4 bits) of the Q channel in its subcode or by identifying it in the absence of TOC. It is expanding its applications in the field of electronic publishing by effectively utilizing the large capacity and high-speed accessibility of discs.

[0004]

In the above-mentioned CD-ROM, the voice is compressed by ADPCM, and the original sound quality cannot be reproduced by the compression, and recording with higher hi-finess is desired. In other words, it is expected that a disc capable of recording an audio signal having a frequency band equal to or more than twice that of a normal CD can be recorded even if compressed. By the way, the dynamic range of the component in the band of 2 times or more may be smaller than that in the band of 1 time in terms of hearing. Here, the 1 ×, 2 ×, and 4 × band components will be described. There are the following two cases. One is a band component up to about 24 kHz which is sampled by 48 kHz which is a sampling frequency of an audio signal in the DAT standard which is generalized in digital audio technology, and a band component of double is The component means a band component up to about 48 kHz, which is doubled, that is, sampled using 96 kHz as a sampling frequency.
The doubled band component means a doubled band component, that is, a band component up to about 96 kHz sampled using 192 kHz as the sampling frequency. The other is that the 1 × band component is 96 kHz, which is the sampling frequency of the audio signal in the DVD standard.
The band component up to about 48 kHz that is sampled by the double band component means a band component up to about 96 kHz that is doubled, that is, a band component up to about 96 kHz sampled using 192 kHz as the sampling frequency, and further quadrupled. The band component means a band component up to about 192 kHz, which is further doubled, that is, sampled using 384 kHz as the sampling frequency. In addition, these frequencies are examples,
The invention is not limited to these frequencies. The present invention does not compress the 1 × band component to cause an error,
It was created for the purpose of providing an encoding device and a decoding device capable of compressing only a band component of twice or more and suppressing an error of a high frequency component caused by the compression.

[0005]

According to the present invention, in order to achieve the above object, reproduction at 1 × sampling is performed without adding arithmetic processing to data, that is, it is used as it is without deterioration and sampling at 2 × or more is performed. In reproduction, the interpolation data is generated from accurate double or more sampling data, and the compressed audio data is decoded and reproduced to suppress deterioration.

That is, according to the present invention, the analog signal is sampled at a predetermined sampling frequency and analog-digital converted to obtain first sampling code information, and the analog signal is converted to the predetermined analog signal. Second A / D conversion means for sampling at a frequency twice the sampling frequency and performing analog-to-digital conversion to obtain second sampling code information, and the second sampling code information at the same timing as the first sampling code information. Select means for thinning out to 1/2, difference information detecting means for obtaining difference information between the first sampling code information and output information of the selecting means, and the first sampling code information and the difference information in a predetermined format. An encoding device is provided having a packing means for

Furthermore, according to the present invention, first channel A / D conversion means for sampling first channel analog signals by sampling at a predetermined sampling frequency and converting the second channel analog signals into second signals, and second channel analog signals. Second A / D conversion means for sampling the signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information; and the second sampling code information for the first sampling code information. Selection means for decimating to 1/2 at the same timing, difference information detection means for obtaining difference information between the first sampling code information and output information of the selecting means, sampling code information for the two channels, and Means for segmenting and transmitting the difference information as three channels. Apparatus is provided.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling The code information is first sampled every other sample obtained by thinning out the code information to 1/2 so that it has the same timing as the first sampling code information.
A first means for outputting the output information and for outputting the second output information for every other one of the remaining samples to be thinned out; Difference information detecting means, second difference information detecting means for obtaining difference information between the first sampling code information or its function information and the second output information of the selecting means, the first sampling code information and the difference between the two. There is provided an encoding device having a packing means for converting information into a predetermined format.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling Selecting means for thinning out the code information to 1/2 so as to have the same timing as the first sampling code information, and difference information detecting means for obtaining difference information between the first sampling code information and output information of the selecting means, An encoding apparatus is provided that includes means for scaling the difference information for each predetermined frame, and packing means for setting the first sampling code information and the difference information in a predetermined format.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling The code information is first sampled every other sample obtained by thinning out the code information to 1/2 so that it has the same timing as the first sampling code information.
A first means for outputting the output information and for outputting the second output information for every other one of the remaining samples to be thinned out; and for obtaining difference information between the first sampling code information and the first output information of the selecting means Difference information detecting means, second difference information detecting means for obtaining difference information between the first sampling code information or the function information thereof and the second output information of the selecting means, and the first and second difference information are predetermined. There is provided an encoding device including a unit for scaling for each frame and a packing unit for setting the first sampling code information and the first and second difference information in a predetermined format.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling The code information is first sampled every other sample obtained by thinning out the code information to 1/2 so that it has the same timing as the first sampling code information.
A first means for outputting the output information and outputting the second output information for every other sample of the thinning-out one, and for obtaining difference information between the first sampling code information and the first output information of the selecting means, Difference information detection means, prediction means for obtaining the predicted value from the second sampling code information,
Second difference information detecting means for obtaining difference information between the predicted value and the second output information of the selecting means, means for scaling the first and second difference information for each predetermined frame, and the first sampling code There is provided an encoding device having information and packing means for converting the first and second difference information into a predetermined format.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency four times the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the first sampling A reference value determination unit that obtains a function of two consecutive sampling code information, or one of sampling information itself or a function thereof as a reference value by using two consecutive sampling code information of the code information, and the first sampling. First difference information detecting means for detecting difference information between the code information and the second sampling code information at the same timing as the first sampling code information; the reference value from the reference value determining means; Two consecutive sampling codes of the first sampling code information out of the two sampling code information Second difference information detecting means for detecting difference information between an intermediate point of information and that at the same timing, and the first sampling code information and the respective difference information from the first and second difference information detecting means are predetermined. An encoding device is provided having a packing means of the above format.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency four times the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the first sampling Difference information detecting means for detecting difference information between the code information and the second sampling code information at the same timing as the first sampling code information; and the first sampling code information of the second sampling code information. Coding means for coding other than the same timing by ADPCM, and packing means for making the first sampling code information, the difference information from the difference information detecting means and the output signal of the coding means into a predetermined format. An encoding device having:

Further in accordance with the present invention, the analog signal is
Second sampling obtained by sampling the analog signal at a frequency twice as high as the predetermined sampling frequency and performing analog-digital conversion on the analog signal which is sampled at a predetermined sampling frequency and analog-digital converted. 1/2 the code information so that it has the same timing as the first sampling code information.
Information indicating the difference between the thinned second sampling code information and the first sampling code information is used as difference information, and when the first sampling code information and the difference information are transmitted, a response to them is sent. A decoding device for adding the transmitted difference information to the first sampling code information, decoding half of the sampling code information twice as much as the first sampling code information, and decoding the 2 Means for decoding double sampling code information, first D / A converting means for digital-analog converting the first sampling code information at the predetermined sampling frequency, and the above-mentioned 2 using the signal decoded by the decoding means. And a second D / A conversion means for performing digital-analog conversion at a double sampling frequency.

Further, according to the present invention, a 2-channel analog signal is sampled at a predetermined sampling frequency and analog-to-digital converted to be first sampling code information, and the 2-channel analog signal is
The second sampling code information sampled at a frequency twice the predetermined sampling frequency and subjected to analog-to-digital conversion is thinned to 1/2 so as to have the same timing as the first sampling code information. Information indicating a difference between the second sampling code information and the first sampling code information is used as difference information, and when the difference information as the first sampling code information of the second channel and the third channel is transmitted, A decoding device that responds, wherein the transmitted difference information is added to the first sampling code information, half of the sampling code information that is twice the first sampling code information is decoded, and the decoding information Means for decoding twice as much sampling code information, and the predetermined sampling for the first sampling code information A decoding device having first D / A conversion means for performing digital-analog conversion at a wave number and second D / A conversion means for performing digital-analog conversion at the double sampling frequency using the signal decoded by the decoding means is provided. Provided.

Further in accordance with the present invention, the analog signal is
Second sampling obtained by sampling the analog signal at a frequency twice as high as the predetermined sampling frequency and performing analog-digital conversion on the analog signal which is sampled at a predetermined sampling frequency and analog-digital converted. 1/2 the code information so that it has the same timing as the first sampling code information.
Information that indicates the difference between the thinned second sampling code information and the first sampling code information.
Difference information, and information indicating the difference between the first sampling code information or its function information and the information at every other sample of the remaining thinning-out, as the second difference information, the first sampling code information and the first and the second A decoding device that responds to two-difference information when it is transmitted, and means for adding the transmitted first difference information to the first sampling code information and decoding one of double sampling code information. And the second difference information transmitted to the decoded information is added, or the second difference information transmitted to the sampling code information or a function signal thereof is added to obtain the other of the double sampling code information. Means, a first D / A conversion means for converting the first sampling code information into a digital-analog format at the predetermined sampling frequency, and the decoding means. A first 2D / A converting means for digital-to-analog conversion at twice the sampling frequency of the using more decoded signal, the decoding device comprising is provided.

Further in accordance with the present invention, the analog signal is
Second sampling obtained by sampling the analog signal at a frequency twice as high as the predetermined sampling frequency and performing analog-digital conversion on the analog signal which is sampled at a predetermined sampling frequency and analog-digital converted. 1/2 the code information so that it has the same timing as the first sampling code information.
When the information indicating the difference between the thinned second sampling code information and the first sampling code information is set as difference information, the difference information is scaled for each predetermined frame, and the first sampling code When the information and the difference information are transmitted, a decoding device which responds to the information and means for controlling the value of the difference information using the transmitted scaling information, and the controlled difference information being the first Means for adding to the sampling code information, decoding half of the sampling code information that is twice the first sampling code information, and decoding the sampling code information that is twice the decoding information; and the first sampling code information. A first D / A conversion means for converting the analog to digital at the predetermined sampling frequency, and a signal decoded by the decoding means. A first 2D / A converting means for digital-to-analog converter, the decoding device with is provided at twice the sampling frequency of the use.

Further in accordance with the present invention, the analog signal is
Second sampling obtained by sampling the analog signal at a frequency twice as high as the predetermined sampling frequency and performing analog-digital conversion on the analog signal which is sampled at a predetermined sampling frequency and analog-digital converted. 1/2 the code information so that it has the same timing as the first sampling code information.
Information that indicates the difference between the thinned second sampling code information and the first sampling code information.
Difference information, and information indicating a difference between the first sampling code information or the function information thereof and information of every other sample of the remaining thinning-out is used as second difference information, and the first and second difference information are predetermined frames. A decoding device that responds to the first sampling code information and the first and second difference information when the first sampling code information and the first and second difference information are transmitted by using the transmitted scaling information. 2 means for controlling the value of the difference information, and the controlled first
Means for adding difference information to the first sampling code information and decoding one of double sampling code information, and adding the controlled second difference information to these decoding information, or the sampling code information Alternatively, means for adding the controlled second difference information to the function signal and decoding the other of the doubled sampling code information, and a first D for digital-analog converting the first sampling code information at the predetermined sampling frequency. Second D / A / A conversion means and digital / analog conversion at the sampling frequency doubled by using the signal decoded by the decoding means
A decoding device having A conversion means is provided.

Further in accordance with the present invention, the analog signal is
Second sampling obtained by sampling the analog signal at a frequency twice as high as the predetermined sampling frequency and performing analog-digital conversion on the analog signal which is sampled at a predetermined sampling frequency and analog-digital converted. 1/2 the code information so that it has the same timing as the first sampling code information.
Information that indicates the difference between the thinned second sampling code information and the first sampling code information.
Difference information, and information indicating a difference between the first sampling code information or the function information thereof and information of every other sample of the remaining thinning-out is used as second difference information, and the first and second difference information are predetermined frames. A decoding device that responds to the first sampling code information and the first and second difference information when the first sampling code information and the first and second difference information are transmitted by using the transmitted scaling information. 2 means for controlling the value of the difference information, and the controlled first
Means for adding difference information to the first sampling code information to decode one of the double sampling code information, means for obtaining a prediction value from the second sampling code information, and the first value controlled to the prediction value. Means for adding the two difference information and decoding the other of the double sampling code information, and first D / A converting means for digital-analog converting the first sampling code information at the predetermined sampling frequency,
Using the signal decoded by the decoding means,
And a second D / A conversion means for performing digital-analog conversion at a double sampling frequency.

Further in accordance with the present invention, the analog signal is
The first sampling code information is obtained by sampling at a predetermined sampling frequency and analog-digital conversion, and the second sampling code is obtained by sampling the analog signal at a frequency four times the predetermined sampling frequency and performing analog-digital conversion. As the information, a reference value is calculated using one of the first sampling code information or two consecutive sampling code information, and the first value is calculated.
The difference information between the sampling code information and the second sampling code information at the same timing as the first sampling code information is defined as the first difference information, and the first value of the reference value and the second sampling code information is used. Difference information between the midpoint of two consecutive sampling code information pieces of the sampling code information and those at the same timing is defined as second difference information, and the first sampling code information and the first and second sampling code information pieces.
A decoding device which responds to difference information when the difference information is transmitted, adds the transmitted first difference information to the first sampling code information, and decodes a quarter of the second sampling code information. Means and one of the first sampling code information or two consecutive sampling code information thereof to calculate the reference value, and the second sampling using the reference value and the second difference information. Means for decoding the value at the intermediate point of the code information to decode another quarter of the second sampling code information; means for decoding a quarter of the second sampling code information; Interpolation processing means for decoding the remaining two quarters of the second sampling code information by using the output signal of the means for decoding the other one quarter of the two sampling code information,
A means for selecting the output signals of the decoding means and the interpolation processing means to decode the second sampling code information, and a first D / A for digital-analog converting the first sampling code information at the predetermined sampling frequency. There is provided a decoding device having a conversion means and a second D / A conversion means for performing digital-analog conversion at the sampling frequency of 4 times using the signal decoded by the means for decoding the second sampling code information.

Further in accordance with the present invention, the analog signal is
The first sampling code information is obtained by sampling at a predetermined sampling frequency and analog-digital conversion, and the second sampling code is obtained by sampling the analog signal at a frequency four times the predetermined sampling frequency and performing analog-digital conversion. As the information, a reference value is calculated using one of the first sampling code information or two consecutive sampling code information, and the first value is calculated.
The difference information between the sampling code information and the second sampling code information at the same timing as the first sampling code information is defined as the first difference information, and the first value of the reference value and the second sampling code information is used. When the difference information between the midpoint of two consecutive sampling code information pieces of the sampling code information and the one at the same timing is used as the second difference information, the first sampling code information and the first and second difference information are transmitted. And a decoding device which responds to these, means for adding the transmitted first difference information to the first sampling code information and decoding a quarter of the second sampling code information, The reference value is calculated by using one piece of the first sampling code information or two pieces of the sampling code information that are continuous, and the reference value and the second value are calculated. Means for decoding the value at the intermediate point of the second sampling code information using the information to decode another quarter of the second sampling code information; and a quarter of the second sampling code information. Means for decoding 1 and another quarter of the second sampling code information
Using the output signal of the decoding means and the interpolation processing means for decoding the remaining two quarters of the second sampling code information, the decoding means, and the output signals of the interpolation processing means. A means for decoding the second sampling code information, and a first D / D converting the first sampling code information digital-analog at the predetermined sampling frequency.
There is provided a decoding device having A conversion means and second D / A conversion means for performing digital-analog conversion at the sampling frequency of 4 times using the signal decoded by the means for decoding the second sampling code information. .

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling Selecting means for thinning out the code information to 1/2 so as to have the same timing as the first sampling code information, and difference information detecting means for obtaining difference information between the first sampling code information and output information of the selecting means, There is provided an encoded information recorded medium in which a signal encoded by an encoding device having the first sampling code information and packing means for setting the difference information in a predetermined format is recorded.

Further, according to the present invention, first channel A / D converting means for sampling the second channel analog signal at a predetermined sampling frequency and converting the second channel analog signal into first digital code information, and the second channel analog signal. Second A / D conversion means for sampling the signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information; and the second sampling code information for the first sampling code information. Selection means for decimating to 1/2 at the same timing, difference information detection means for obtaining difference information between the first sampling code information and output information of the selecting means, sampling code information for the two channels, and Means for dividing and transmitting the difference information as three channels. Encoding information recorded medium encoded signal has been recorded by the device are provided.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling The code information is first sampled every other sample obtained by thinning out the code information to 1/2 so that it has the same timing as the first sampling code information.
A first means for outputting the output information and for outputting the second output information for every other one of the remaining samples to be thinned out; and for obtaining difference information between the first sampling code information and the first output information of the selecting means Difference information detecting means, second difference information detecting means for obtaining difference information between the first sampling code information or its function information and the second output information of the selecting means, the first sampling code information and the difference between the two. There is provided an encoded information recorded medium in which a signal encoded by an encoding device having a packing means for converting information into a predetermined format is recorded.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling Selecting means for thinning out the code information to ½ so as to have the same timing as the first sampling code information, and difference information detecting means for obtaining difference information between the first sampling code information and output information of the selecting means, Encoding information recording in which a signal encoded by an encoding device having means for scaling the difference information for each predetermined frame and packing means for making the first sampling code information and the difference information into a predetermined format are recorded Used media is provided.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling The code information is first sampled every other sample obtained by thinning out the code information to 1/2 so that it has the same timing as the first sampling code information.
A first means for outputting the output information and for outputting the second output information for every other one of the remaining samples to be thinned out; and for obtaining difference information between the first sampling code information and the first output information of the selecting means Difference information detecting means, second difference information detecting means for obtaining difference information between the first sampling code information or the function information thereof and the second output information of the selecting means, and the first and second difference information are predetermined. Encoded information recorded with a signal encoded by an encoding device having means for scaling for each frame, and packing means for making the first sampling code information and the first and second difference information into a predetermined format. Media is provided.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the second sampling The code information is first sampled every other sample obtained by thinning out the code information to 1/2 so that it has the same timing as the first sampling code information.
A first means for outputting the output information and outputting the second output information for every other sample of the thinning-out one, and for obtaining difference information between the first sampling code information and the first output information of the selecting means, Difference information detection means, prediction means for obtaining the predicted value from the second sampling code information,
Second difference information detecting means for obtaining difference information between the predicted value and the second output information of the selecting means, means for scaling the first and second difference information for each predetermined frame, and the first sampling code. There is provided an encoded information recorded medium on which a signal encoded by an encoding device, which has information and packing means for setting the first and second difference information in a predetermined format, is recorded.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency four times the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the first sampling A reference value determination unit that obtains a function of two consecutive sampling code information, or one of sampling information itself or a function thereof as a reference value by using two consecutive sampling code information of the code information, and the first sampling. First difference information detecting means for detecting difference information between the code information and the second sampling code information at the same timing as the first sampling code information; the reference value from the reference value determining means; Two consecutive sampling codes of the first sampling code information out of the two sampling code information Second difference information detecting means for detecting difference information between an intermediate point of information and that at the same timing, and the first sampling code information and the respective difference information from the first and second difference information detecting means are predetermined. There is provided an encoded information recorded medium on which a signal encoded by an encoding device having a packing means having the format of 1. is recorded.

Further in accordance with the present invention, the analog signal is
A first sampling code information that is sampled at a predetermined sampling frequency and analog-digital converted;
A / D conversion means, a second A / D conversion means for sampling the analog signal at a frequency four times the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information, and the first sampling Difference information detecting means for detecting difference information between the code information and the second sampling code information at the same timing as the first sampling code information; and the first sampling code information of the second sampling code information. Coding means for coding other than the same timing by ADPCM, and packing means for making the first sampling code information, the difference information from the difference information detecting means and the output signal of the coding means into a predetermined format. Encoding information recorded with the signal encoded by the encoding device having The body is provided.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an encoding apparatus of the present invention,
Embodiments of a decoding device and a medium on which encoded information is recorded will be described in detail with reference to the drawings by a preferred embodiment. <First Embodiment (FIG. 1): Encoding Device> FIG. 1 is a block diagram showing an encoding device as a first embodiment of the present invention. In the block diagram of FIG. 1, it is assumed that the input signal input to the input terminal 1 is sampled with the waveforms shown in FIG.

The input signal is converted into a digital signal by the A / D converter 2 by a clock from the clock generator 5 at a sampling frequency of 1 times, for example, 48 kHz, and from the output, sampling data хa1, хa2, хa3 ,.
···, хai, ··· (i is a natural number indicating the sample number). At the same time, sampling data хb1, хc1, хb2, хc2, ..., хbi, ... Are obtained from the input signal by the A / D converter 3 at a double sampling frequency, for example, 96 kHz, by the clock from the clock generator 5. . These sampling data are converted with a resolution of 24 bits, for example. Switch 4 хb1, хb2, ...
, Хbi, ... Are selected, and the difference calculator 6 calculates хbi−хai = Δi to obtain the difference Δi. Here, the difference Δi is represented by 24 bits or less. Note that when the difference Δi is represented by 24 bits, complete lossless compression (lossless compression) is possible.

The packing encoder 7 receives the 1 × sampling data хai and the difference data Δi, performs packing processing in an array as shown in FIG. 3, and outputs it to the output terminal 8. If the user data is 2034 bytes,
The above 1 × sampling data хai and 338 difference data Δi are stored. 2 subheaders
Bytes (In DVD, user data is called packet and sub-header is called packet header). Further, a recording medium (carrier) can be manufactured corresponding to the above embodiment by manufacturing a master from the signal of the output terminal 8 of the packing encoder 7 of FIG. The recording medium may be an optical disc such as a DVD.

<Second Embodiment (FIG. 6): Decoding Device> FIG. 6 is a block diagram showing a decoding device as a second embodiment of the present invention. This will be explained assuming that the input signal (encoded data) input to the input terminal 9 in the block diagram of FIG. 6 is D / A-converted at a frequency having a relation of 1 × and 2 × with a waveform as shown in FIG. . Using the input signal, the output from the unpacking decoder 10 is calculated by the adder 11 as Δi + хai = хbi to obtain хbi. Here, the output хbi is represented by 24 bits.

Interpolation processing circuit 12 uses a plurality of хbi to obtain inter-sampling data хc1, хc2, ..., хci, ...
・ Calculate For example, in the upsampling method, 0 data is filled in each of them and the above value can be obtained by a low pass filter. Then, switch the data to хb1, хc1, ..., хbi, хci, ...
And the analog signal is output by the D / A converter 16. The unpacking decoder 10 to 1
The doubled data хa1, ... Is directly supplied to the D / A converter 15 and converted with 24-bit precision. Since no calculation is performed here, the conversion is excellent. On the other hand, the doubled sampling data has only one addition operation and can be reproduced without deterioration, and the other can be approximated well, so that the degree of output deterioration is within a few bits in the high range.

<Third Embodiment (FIG. 11): Encoding Device> In the block diagram of FIG. 11, the input signals input to the input terminals 1L and 1R have the waveforms shown in FIG. It will be described as being sampled at the frequency of interest. That is, the input signal is an L channel and R channel stereo signal. The A / D converter 2 uses the clock from the clock generator 5 to multiply the sampling frequency by, for example, 48 k.
, Converted into a digital signal, and sampling data хa1, хa2, хa3, ..., хai, ... Are obtained from the output. At the same time, sampling data хb from the input signal at a sampling frequency doubled by the clock from the clock generator 5 in the A / D converter 3, for example 96 kHz.
We get 1, хc1, хb2, хc2, ..., хbi, ....
These sampling data are converted with a resolution of 24 bits, for example. Switch 4 хb1, хb2, ..., х
, bi, ... are selected and the difference calculator 6 calculates хbi−хai = Δi to obtain the difference Δi. Here, the difference Δi is represented by 12 bits or less.

The packing encoder 7 receives the 1 × sampling data хai and the difference data Δi, performs packing processing in an array as shown in FIG. 14, and outputs it to the output terminal 8. Here, when the user data is 2034 bytes, the above-mentioned 1 × sampling data хai is stored in 228 L channels, 228 R channels, and 228 pieces of difference data Δ. The subheader is 2 bytes.
That is, the difference data Δ is distributed as 12 bits for each of the L channel and the R channel, and is treated as the third channel.

<Fourth Embodiment (FIG. 13): Decoding Device>
This is because the input signal (encoded data) input to the input terminal 9 in the block diagram of FIG. 13 has a waveform as in the second embodiment shown in FIG. And a decoding device (playback device) corresponding to the encoding device of the third embodiment. That is, it is a decoding device for two-channel signals as stereo signals of the L channel and the R channel, and has the decoding device of FIG. 4 for two channels.
Therefore, detailed description is omitted.

<Fifth Embodiment (FIG. 4): Encoding Device>
This is because the input signal coming into the input terminal 1 in the block diagram of FIG. 4 has a waveform as shown in FIG.
The description will be given assuming that the sampling is performed at a frequency having a double relationship. The input signal is converted into a digital signal by the A / D converter 2 by a clock from the clock generator 5 at a sampling frequency of 1 time, for example, 48 kHz,
Sampling data from output хa1, хa2, хa3, ...
・ 、 Get хai, ... At the same time, from the input signal, A / D
In the converter 3, sampling data хb1, хc1, хb2, хc2, ..., х with sampling frequency doubled by the clock from the clock generator 5, eg 96 kHz,
get bi ... These sampling data are converted with a resolution of 24 bits, for example. Switch 4 with хb
Difference calculator 6 by selecting 1, хb2, ..., хbi, ...
In A, хbi−хai = Δ1i is calculated to obtain the difference Δ1i. Here, the difference Δ1i is represented by 8 bits or less. Switch 4 for хc1, хc
.., хci, ... Are selected and deltaci−хai = Δ2i is calculated by the difference calculator 6B to obtain the difference Δ2i. Here, the difference Δ2i is represented by 8 bits or less.

The packing encoder 7 receives the 1 × sampling data хai and the difference data Δ1i and Δ2i, performs packing processing in an array as shown in FIG. 3, and outputs it to the output terminal 8. Here, if the user data is 2034 bytes, the sampling data хai that is 1 times the above is 406
Similarly, 406 pieces of difference data Δ1i and Δ2i are respectively stored. The subheader is 4 bytes.

<Sixth Embodiment (FIG. 8): Decoding Device> This is an input terminal 9 in the block diagram of FIG.
It is assumed that the input signal (encoded data) coming in is subjected to D / A conversion at a frequency having a relation of 1 and 2 with a waveform as shown in FIG. As for the input signal, the output from the unpacking decoder 10 is first calculated by the adder 11A as Δ1i + хai = хbi to obtain хbi. Here, the output хbi is represented by 24 bits. Next, the adder 11B calculates Δ2i + хai = хci to obtain хbi. Here, the output хci is represented by 24 bits.

Then, the data is sent to switch хb1,
Output as хc1, ..., хbi, хci, ... and D
It becomes an analog signal by the / A converter 16. In addition,
1x data хa1 from unpacking decoder 10,
.. is directly supplied to the D / A converter 15 and converted with 24-bit precision. Since no calculation is performed here, the conversion is excellent. On the other hand, the double sampling data is only an addition operation and is reproduced without deterioration. The degree of deterioration is within a few bits in the high frequency range.

<Seventh Embodiment (FIG. 12): Encoding Device> In the block diagram of FIG. 12, the input signals input to the input terminals 1L and 1R have waveforms as shown in FIG. It will be described as being sampled at the frequency of interest. That is, the input signal is an L channel and R channel stereo signal. The A / D converter 2 uses the clock from the clock generator 5 to multiply the sampling frequency by, for example, 48 k.
, Converted into a digital signal, and sampling data хa1, хa2, хa3, ..., хai, ... Are obtained from the output. At the same time, sampling data хb from the input signal at a sampling frequency doubled by the clock from the clock generator 5 in the A / D converter 3, for example 96 kHz.
We get 1, хc1, хb2, хc2, ..., хbi, ....
These sampling data are converted with a resolution of 24 bits, for example. Switch 4 хb1, хb2, ..., х
, bi, ... are selected and the difference calculator 6A calculates хbi−хai = Δ1i to obtain the difference Δ1i. Here, the difference Δ1i is 6 on average.
It is expressed in bits or less. Switch 4 for хc1, х
Select c2, ..., хci, ... And calculate δbi−хci = Δ2i by the difference calculator 6B to obtain the difference Δ2i. Here, the difference Δ2i is 6 on average.
It is expressed in bits or less.

The packing encoder 7 receives the 1 × sampling data хai and the difference data Δ1i and Δ2i, performs packing processing in an array as shown in FIG. 17, and outputs it to the output terminal 8. Here, if the user data is 2034 bytes, the above-mentioned 1 time sampling data хai is 225 L channels, 225 R channels, and the difference data Δ1.
Similarly, 225 pieces of i and Δ2i are stored. The subheader is 9 bytes. That is, the difference data Δ is distributed as the average data 6 bits of difference data Δ1i and Δ2i for the L channel and the R channel, respectively, and is treated as the third channel.

<Eighth Embodiment (FIG. 15): Decoding Device>
This is because the input signal (encoded data) input to the input terminal 9 in the block diagram of FIG. 15 has a waveform as shown in FIG.
It is A-converted and will be described as a decoding device (playback device) corresponding to the encoding device of the seventh embodiment.

In the fifth embodiment, хci-хai = Δ2i was used for explanation. However, the difference is obtained based on the sample averages on both sides of хci such as хci- (хai + хa, i + 1) / 2 = Δ2i. Good. In this case, in the decoder of the sixth embodiment, the adder 11B of Δ2i + (хai + хa, i + 1) / 2 = хci may be used instead of Δ2i + хai = хci.

<Ninth Embodiment (FIG. 1): Encoding Device>
This is because the input signal coming into the input terminal 1 in the block diagram of FIG.
The description will be given assuming that the sampling is performed at a frequency having a double relationship. The input signal is converted into a digital signal by the A / D converter 2 by a clock from the clock generator 5 at a sampling frequency of 1 time, for example, 48 kHz,
Sampling data from output хa1, хa2, хa3, ...
・ 、 Get хai, ... At the same time, from the input signal, A / D
In the converter 3, sampling data хb1, хc1, хb2, хc2, ..., х with sampling frequency doubled by the clock from the clock generator 5, eg 96 kHz,
get bi ... These sampling data are converted with a resolution of 24 bits, for example. Switch 4 with хb
Difference calculator 6 by selecting 1, хb2, ..., хbi, ...
Then хbi−хai = Δi is calculated to obtain the difference Δi. Here, the difference Δi is expressed by the packing encoder 7 in the subsequent stage as, for example, 12-bit normalized scaled data.

The packing encoder 7 receives the 1 × sampling data хai and the difference data Δi, performs packing processing in the arrangement as shown in FIG. 5, and outputs it to the output terminal 8. If the user data is 2034 bytes,
The above-mentioned 1 × sampling data хai and 455 difference data Δi are stored. 7 for subheader
Bytes. The 3 bytes therein are assigned a peak value SPj (j indicates a frame) as a scaling factor (scaling information) for each frame of the difference Δi to be scaled.

<Tenth Embodiment (FIG. 9): Decoding Device>
This will be explained on the assumption that the input signal (encoded data) input to the input terminal 9 in the block diagram of FIG. 9 is D / A-converted at a frequency having a relation of 1 × and 2 × with a waveform as shown in FIG. . As for the input signal, the output from the unpacking decoder 10 multiplies the peak value Spj by the difference and Δ1i · Spj + хai = хbi is calculated in the adder 11 (j is a natural number) to obtain хbi. Here, the output хbi is represented by 24 bits. The interpolation processing circuit 12 uses a plurality of хbi to obtain inter-sampling data хc1, хc2,
・ ・ ・, Хci, ... are calculated. For example, in the upsampling method, 0 data is filled in each of them and the above value can be obtained by a low pass filter.

Then, the data is sent to switch хb1,
Output as хc1, ..., хbi, хci, ... and D
It becomes an analog signal by the / A converter 16. In addition,
1x data хa1 from unpacking decoder 10,
.. is directly supplied to the D / A converter 15 and converted with 24-bit precision. Since no calculation is performed here, the conversion is excellent. On the other hand, the doubled sampling data has only one addition operation and is reproduced without deterioration, and the other is
Since good approximation is possible, the degree of output deterioration is within a few bits in the high frequency range.

<Eleventh Embodiment (FIG. 4): Encoding Device> This is a frequency diagram in which the input signal input to the input terminal 1 in the block diagram of FIG. 4 has a waveform as shown in FIG. Will be sampled in. The input signal is converted into a digital signal by the A / D converter 2 by a clock from the clock generator 5 at a sampling frequency of 1 time, for example, 48 kHz,
Sampling data from output хa1, хa2, хa3, ...
・ 、 Get хai, ... At the same time, from the input signal, A / D
In the converter 3, sampling data хb1, хc1, хb2, хc2, ..., х with sampling frequency doubled by the clock from the clock generator 5, eg 96 kHz,
get bi ... These sampling data are converted with a resolution of 24 bits, for example. Switch 4 with хb
Difference calculator 6 by selecting 1, хb2, ..., хbi, ...
In A, хbi−хai = Δ1i is calculated to obtain the difference Δ1i. Here, the difference Δ1i is expressed by the packing encoder 7 in the subsequent stage as 8-bit normalized scaled data. Switch 4
Difference calculator 6 by selecting c1, хc2, ..., хci, ...
In B, хci−хai = Δ2i is calculated to obtain the difference Δ2i. Here, the difference Δ2i is expressed by the packing encoder 7 in the subsequent stage as 8-bit normalized scaled data.

The packing encoder 7 receives the 1 × sampling data хai and the difference data Δ1i and Δ2i, performs packing processing in an array as shown in FIG. 3, and outputs it to the output terminal 8. Here, when the user data is 2034 bytes, the sampling data хai that is 1 times the above is 405
Similarly, 405 pieces of difference data Δ1i and Δ2i are respectively stored. The subheader is 9 bytes. 3 bytes are allocated to the peak value Sp1j of the scaling difference Δ1i, and the other 3 bytes are allocated to the peak value Sp2j of the scaling difference Δ2i.

<Twelfth Embodiment (FIG. 10): Decoding Device> In the block diagram of FIG. 10, the input signal (encoded data) input to the input terminal 9 is shown in FIG.
Waveforms such as D / A at 1x and 2x related frequencies
It will be described as being converted. As for the input signal, the output from the unpacking decoder 10 multiplies the peak value by the difference and Δ1i · Sp1j + хai = хbi is calculated in the adder 11A to obtain хbi. Here, the output хbi is represented by 24 bits. Next, the adder 11B calculates Δ2i · Sp2j + хai = хci to obtain хci. Here, the output хci is represented by 24 bits.

Then, the data is sent to switch хb1,
Output as хc1, ..., хbi, хci, ... and D
It becomes an analog signal by the / A converter 16. In addition,
1x data хa1 from unpacking decoder 10,
.. is directly supplied to the D / A converter 15 and converted with 24-bit precision. Since no calculation is performed here, the conversion is excellent. On the other hand, the double sampling data is only an addition operation and is reproduced without deterioration. The degree of deterioration is within a few bits in the high frequency range.

<Thirteenth embodiment (FIG. 12): Encoding device> Input terminal 1 in the block diagram of FIG.
It is assumed that the input signals incoming to L and 1R are sampled at the frequencies having the relations of 1 × and 2 × with the waveforms shown in FIG. 2, respectively. That is, the input signal is an L channel and R channel stereo signal. A / D
The converter 2 converts it into a digital signal by a clock from the clock generator 5 at a sampling frequency of 1 time, for example, 48 kHz, and outputs the sampling data х
We get a1, хa2, хa3, ..., хai, .... At the same time, from the input signal, the clock generator 5 in the A / D converter 3
Sampling data хb1, хc1, х at twice the sampling frequency, for example 96kHz, by the clock of
We get b2, хc2, ..., хbi, ... These sampling data are converted with a resolution of 24 bits, for example. The switch 4 selects хb1, хb2, ..., хbi, ... And the difference calculator 6A calculates хbi−хai = Δ1i to obtain the difference Δ1i. Here, the difference Δ1i is represented by a normalized value of 6 bits on average in the packing encoder 7 in the subsequent stage. Switch 4 хc1, хc2, ..., хci,
.. is selected, and the difference calculator 6B calculates хbi−хci = Δ2i to obtain the difference Δ2i. Here, the difference Δ2i is represented by a normalized value of 6 bits on average in the packing encoder 7 in the subsequent stage. The normalization is performed for the peak value PL that is the sum of the difference Δ1i and the difference Δ2i (the same peak value PR is used for the R channel).

The packing encoder 7 receives the 1 × sampling data хai and the difference data Δ1i and Δ2i, performs packing processing in an array as shown in FIG. 5, and outputs it to the output terminal 8. Here, when the user data is 2034 bytes, the above-mentioned 1 time sampling data хai is 225 L channels, 225 R channels, and the difference data Δ.
225 pieces of 1i and Δ2i are also stored. The subheader is 9 bytes. That is, the differential data Δ is distributed as 6-bit differential data Δ1i and Δ2i for the L channel and the R channel, respectively, and is treated as the third channel. Peak values PL and PR of 3 bytes are arranged in the sub-header.

<Fourteenth Embodiment (FIG. 16): Encoding Device> The fourteenth embodiment is different from each of the above-described embodiments that handles two differences in the following points. That is, the second difference is set as xai-Prediction [i] = Δ2i. However, xai-Prediction [i] is an Nth-order linear prediction value, and when N = 3, Prediction [i] = A1 * xa, i-1 + A2 * xbi + A3 * x
It is represented by a, i + 1 and can be predicted as a point on a curve passing through the three points xa, i-1, xbi, xa, i + 1. Such a linear prediction is shown in FIG.
This is performed by the linear prediction circuit 19 in the circuit shown in FIG. FIG.
Circuit responds to the A / D converters 2 and 3, and the above A1, A2 and A3 are prediction coefficients. In the fourteenth embodiment, the A / D converter 3 uses a high sampling frequency of 192 kHz.

<Fifteenth Embodiment (FIG. 17): Decoding Device> The seventeenth embodiment is different from the above-mentioned embodiments that handle two differences in the following points. That is, the adder 21 obtains Δ2i + Prediction [i] = xai. However, Prediction [i] is an Nth-order linear prediction value, and when N = 3, Prediction [i] = A1 * xa, i-1 + A2 * xbi + A3 * x
It is represented by a, i + 1 and can be predicted by a decoder as a point on a curve passing through three points xa, i-1, xbi, xa, i + 1. Such linear prediction is performed by the linear prediction circuit 20 in the circuit shown in FIG.
The circuit of FIG. 17 responds to the unpacking decoder 10. In this embodiment, the D / A converter 15
High sampling frequency of 192kHz is used in
On the other hand, 96 kHz can be reproduced from the 1 × data. As shown in the above embodiment, any data may be used as the reference for detecting the second difference information.

<Sixteenth Embodiment (FIG. 18): Encoding Device> FIG. 18 is a block diagram showing an encoding device as a sixteenth embodiment of the present invention. In the block diagram of FIG. 18, the input signal coming into the input terminal 1 is shown in FIG.
It is assumed that waveforms such as 9 are sampled at frequencies having a relation of 1 × and 4 ×.

The input signal is converted into a digital signal by the A / D converter 2 with a clock from the clock generator 5A at a sampling frequency of 1 times, for example, 48 kHz, and from the output, sampling data хa1, хa2, хa3 ,.
···, хai, ··· (i is a natural number indicating the sample number). At the same time, the sampling data хb1, хd1, хc1, хe1, хb2, хd2, хc2, хe are sampled at a sampling frequency quadrupled by the clock from the clock generator 5A in the A / D converter 3, for example, 192 kHz, from the input signal.
Get 2, ..., хbi, хdi, хci, хei, ....
These sampling data are converted with a resolution of 24 bits, for example. Switch 4A for хb1, хb2, ...
.. is selected and the difference calculator 6A calculates хbi−хai = Δ1i to obtain the difference Δ1i. Here, the difference Δ1i is represented by 12 bits or less. Further, the output signal of the A / D converter 2 is given to the average value calculator 22, and the average value of two consecutive sampling code information is obtained. Next, the switch 4A selects хc1, хc2, ..., хci, ... And the difference calculator 6B calculates хci- (хai + хa, i + 1) / 2 = Δ2i to obtain the difference Δ2i. Here, the difference Δ2i is represented by 12 bits or less. In this example, the average value of two consecutive sampling code information is used as the reference value for obtaining the difference, but the function of two consecutive data is not limited to the average value, or either one of the data itself or The function can also be used.

The above-mentioned 1 × sampling data хai and difference data Δ1i are input to the packing encoder 7, and packing processing is performed, for example, in an array as shown in FIG. Here, if the user data is 2034 bytes, the above-mentioned 1 × sampling data хai,
Similarly, 677 pieces of difference data Δ1i and Δ2i are stored. The subheader is 5 bytes (in DVD, user data is a packet and the subheader is a packet header).

<Seventeenth Embodiment (FIG. 21): Decoding Device> FIG. 21 is a block diagram showing a decoding device as a seventeenth embodiment of the present invention. This will be explained on the assumption that the input signal (encoded data) input to the input terminal 9 in the block diagram of FIG. 21 is D / A-converted at a frequency having a relationship of 1 × and 4 × with a waveform as shown in FIG. . The input signal is 3 by the unpacking decoder 10.
The data хai, Δ1i, and Δ2i of the system are separated, and the outputs хai and Δ1i from the unpacking decoder 10 are calculated by the adder 11 as Δ1i + хai = хbi to obtain хbi. Where the output хbi is 24
Expressed in bits. Also, the unpacking decoder 10
From the outputs хai and Δ2i, Δ2i + (хai + хa, i + 1) / 2 = хci is calculated by the average / adder (average value calculator and adder) 24 to obtain хci. Where the output хci is 24
Expressed in bits.

In the interpolation processing circuit 12A, the sampling data хd1, хe1, хd2, х are used by using a plurality of хbi and хci.
e2, ..., хdi, хei, ... are calculated. For example, in the upsampling method, 0 data is filled in each of them and the above value can be obtained by a low pass filter. So, switch the data to хb1, хd1,
хc1, хe1, ..., хbi, хdi, хci, хei, ...
, And then converted into an analog signal by the D / A converter 16. It should be noted that the unpacking decoder 10 directly supplies 1 × the data хa1, ... To the D / A converter 15 and converts it with 24-bit precision. Since no calculation is performed here, the conversion is excellent. Meanwhile, 4
The doubled sampling data can be reproduced without deterioration on one side only by addition operation, and the other can be approximated well, so that the degree of deterioration of the output is within a few bits in the high range.

<Eighteenth Embodiment (Modification of FIG. 18): Encoding Device> This is one in which two systems from the input terminal 1 to the front of the packing encoder 7 in the block diagram of FIG. 18 are provided as shown in FIG. is there. It is assumed that the input signals coming into the two input terminals (corresponding to the terminals 1L and 1R in FIG. 11) are sampled at the frequencies having the relations of 1 × and 4 × with the waveforms shown in FIG. 19, respectively. That is, the input signal is an L channel and R channel stereo signal. Each input signal is A / D
The converter 2 converts it into a digital signal by a clock from the clock generator 5A at a sampling frequency of 1 time, for example, 48 kHz, and obtains sampling data хa1, хa2, хa3, ..., хai, ... From the output (i Is a natural number indicating the sample number). At the same time, from the input signal,
In the / D converter 3, a sampling frequency four times higher than the clock from the clock generator 5A, for example, 192 kH
z, sampling data хb1, хd1, хc1, хe1, х
b2, хd2, хc2, хe2, ..., хbi, хdi, хci, х
ei, get ... These sampling data are converted with a resolution of 24 bits, for example. Switch 4A for х
Difference calculator 6 by selecting b1, хb2, ..., хbi, ...
In A, хbi−хai = Δ1i is calculated to obtain the difference Δ1i. Here, the difference Δ1i is represented by 6 bits or less. In addition, the A / D converter 2
The output signal of is supplied to the average value calculator 22, and the continuous 2
The average value of the two sampling code information is obtained. Next, the switch 4A selects хc1, хc2, ..., хci, ... And the difference calculator 6B calculates хci- (хai + хa, i + 1) / 2 = Δ2i to obtain the difference Δ2i. Here, the difference Δ2i is represented by 6 bits or less.

The packing encoder 7 receives the 1 × sampling data хai and the difference data Δ1i, performs packing processing in an array as shown in FIG. 23, and outputs the output terminal 8
Output to Here, when the user data is 2034 bytes, the above-mentioned 1 time sampling data хai is 228 L channels, 228 R channels, and the difference data Δ1i, Δ.
Similarly, 228 2i are stored for each channel.
The subheader is 2 bytes. That is, the difference data Δ
12 for each of the L and R channels
Bits are allocated and treated as the third channel.

<Nineteenth Embodiment (Modification of FIG. 21): Decoding Device> This is the unpacking decoder 10 of FIG.
The following two systems are prepared. In the block diagram of FIG. 21, the input signal (encoded data) input to the input terminal 9 is D / A-converted at a frequency having a relation of 1 × and 4 × with a waveform as in the 17th embodiment shown in FIG. This is a decoding device (playback device) corresponding to the encoding device of the eighteenth embodiment. That is, it is a decoding device for a two-channel signal as a stereo signal of the L channel and the R channel, and has the decoding device of FIG. 21 for two channels. Therefore, detailed description is omitted.

<Twentieth Embodiment (FIG. 25): Encoding Device> FIG. 25 is a block diagram showing an encoding device as a twentieth embodiment of the present invention. In the block diagram of FIG. 25, the input signal coming into the input terminal 1 is shown in FIG.
It is assumed that waveforms such as 9 are sampled at frequencies having a relation of 1 × and 4 ×.

The input signal is converted by the A / D converter 2 into a digital signal at a sampling frequency of, for example, 48 kHz by the clock from the clock generator 5A, and the sampling data хa1, хa2, хa3 ,.
···, хai, ··· (i is a natural number indicating the sample number). At the same time, the sampling data хb1, хd1, хc1, хe1, хb2, хd2, хc2, хe are sampled at a sampling frequency quadrupled by the clock from the clock generator 5A in the A / D converter 3, for example, 192 kHz, from the input signal.
Get 2, ..., хbi, хdi, хci, хei, ....
These sampling data are converted with a resolution of 20 bits, for example. Switch 4A for хb1, хb2, ...
Select хbi, ... And calculate хbi-хai = Δi by the difference calculator 6A to obtain the difference Δi. Here, the difference Δi is represented by 11 bits or less. In addition, the A / D converter 2
Switch 4A from the output signal of хbi, хdi, хci, хe
.. is selected and three differences are calculated by the ADPCM encoder 26 as хdi-хbi = Di1 хci-хdi = Di2 хei-хci = Di3. Note that Di1, Di2, and Di3 are represented by the general formula Dik
(K is an integer of 1 to 3). Here, ADPCM as each difference which is an output signal of the ADPCM encoder 26
The data Dik is represented by 3 bits or less.

The 1 × sampling data хai and ADPCM data Dik are input to the packing encoder 7, and packing processing is performed in such an array as shown in FIG. 26 and output to the output terminal 8. Here, when the user data is 2034 bytes, 812 pieces of the above-mentioned 1 × sampling data хai and 812 pieces of difference data Δi and Dik are respectively stored. The subheader is 4 bytes (in DVD, user data is a packet and subheader is a packet header).

<Twenty-first Embodiment (FIG. 27): Decoding Device> FIG. 27 is a block diagram showing a decoding device as a twenty-first embodiment of the present invention. This will be explained assuming that the input signal (encoded data) coming into the input terminal 9 in the block diagram of FIG. 27 is D / A converted at the frequencies of the relation of 1 × and 4 × with the waveform as shown in FIG. . The input signal is 3 by the unpacking decoder 10.
The data хai, Δi, and Dik of the system are separated, and outputs хai and Δi from the unpacking decoder 10 are calculated by an adder 11 as Δi + хai = хbi to obtain хbi. Where the output хbi is 20
Expressed in bits. Also, the unpacking decoder 10
The output Dik and the output хbi of the adder 11 are input to the ADPCM decoder 28, where the inter-sampling data хdi, хci, хei, ... Are calculated using Dik and хbi. Then, switch the data to хb1, хd by switch 13C.
1, хc1, хe1, ..., хbi, хdi, хci, хei, ・
.., and then converted into an analog signal by the D / A converter 16. It should be noted that the unpacking decoder 10 directly supplies 1 × the data хa1, ... To the D / A converter 15 and converts it with 20-bit precision. Since no calculation is performed here, the conversion is excellent. On the other hand, the quadrupled sampling data has only one addition operation and can be reproduced without deterioration, and the other can be approximated well, so that the degree of output deterioration is within a few bits in the high range.

In the description of the first embodiment, it has been explained that a recording medium (carrier) can be manufactured corresponding to the first embodiment by manufacturing a master from the signal of the output terminal 8 of FIG. It goes without saying that the recording medium can be manufactured in a similar manner corresponding to the other embodiments of the encoding apparatus.

[0071]

As described above, since the encoding device, the decoding device and the encoded information recorded medium of the present invention are configured as described above, they have the following effects. That is, in the reproduction in the 1 × sampling, the arithmetic processing is not added to the data, that is, the data is used as it is without deterioration, and in the reproduction in the 2 × or more sampling, interpolation data is generated from the accurate 2 × or more sampling data. Since the deterioration is suppressed by decoding and reproducing the compressed audio data, it is possible to prevent the deterioration of the signal when the double or more band component is encoded and further recorded on the recording medium. .

[Brief description of drawings]

FIG. 1 is a block diagram of an encoding apparatus as a first embodiment and a ninth embodiment of the present invention.

FIG. 2 is a signal waveform diagram for explaining the operation of the encoding device of the present invention.

FIG. 3 is a diagram schematically showing packing performed by the encoding devices according to the first and eleventh embodiments of the present invention.

FIG. 4 is a block diagram of an encoding apparatus as a fifth embodiment and an eleventh embodiment of the present invention.

FIG. 5 is a diagram schematically showing packing performed by an encoding device according to fifth and thirteenth embodiments of the present invention.

FIG. 6 is a block diagram of a decoding device as a second embodiment of the present invention.

FIG. 7 is a signal waveform diagram for explaining the operation of the decoding device of the present invention.

FIG. 8 is a block diagram of a decoding device as a sixth embodiment of the present invention.

FIG. 9 is a block diagram of a decoding device as a tenth embodiment of the present invention.

FIG. 10 is a block diagram of a decoding device as a twelfth embodiment of the present invention.

FIG. 11 is a block diagram of an encoding apparatus as a third embodiment of the present invention.

FIG. 12 is a block diagram of an encoding apparatus as a seventh embodiment and a thirteenth embodiment of the present invention.

FIG. 13 is a block diagram of a decoding device as a fourth embodiment of the present invention.

FIG. 14 is a diagram schematically showing packing performed by the encoding device according to the third embodiment of the present invention.

FIG. 15 is a block diagram of a decoding device as an eighth embodiment of the present invention.

FIG. 16 is a block diagram of part of an encoding device according to a fourteenth embodiment of the present invention.

FIG. 17 is a block diagram of a part of a decoding device as a fifteenth embodiment of the present invention.

FIG. 18 is a block diagram of a part of the encoding device according to the sixteenth embodiment of the present invention.

FIG. 19 is a signal waveform diagram for explaining the operation of the encoding apparatus of the present invention.

FIG. 20 is a diagram schematically showing packing performed by the encoding device according to the sixteenth embodiment of the present invention.

FIG. 21 is a block diagram of part of a decoding device as a seventeenth embodiment of the present invention.

FIG. 22 is a signal waveform diagram for explaining the operation of the decoding device of the present invention.

FIG. 23 is a diagram schematically showing packing performed by the encoding device according to the eighteenth embodiment of the present invention.

FIG. 24 is a schematic diagram of data arrangement showing the format of a DVD in sector units.

FIG. 25 is a block diagram of part of an encoding device according to a twentieth embodiment of the present invention.

FIG. 26 is a diagram schematically showing packing performed by the encoding device according to the twentieth embodiment of the present invention.

FIG. 27 is a block diagram showing part of a decoding device as a twenty-first embodiment of the present invention.

[Explanation of symbols]

1, 1L, 1R, 9 Input terminals 2, 3 A / D converter (A / D converter) 4, 4A, 13, 13A Switch (selector) 5, 5A, 14, 14A Clock generator 6, 6A, 6B Difference calculator (difference information detecting means) 7 Packing encoder (packing means) 8, 17, 18 Output terminal 10 Unpacking decoder 11, 11A, 11B, 11C, 11D, 21 Adder (adders 11A and 111B are decoding means, respectively) 12, 12A interpolation processing circuit (adder 11 or 11A,
It constitutes a means for decoding together with the switch 13 or 13A) 15, 15A, 15B, 16, 16A, 16B D / A
Converter (D / A conversion means) 19, 20 Linear prediction circuit 22 Average value calculator (reference value determination means) 24 Average / adder 26 ADPCM encoder (encoding means) 28 ADPCM decoder

Claims (24)

[Claims] 1. An analog signal is sampled at a predetermined sampling frequency and converted into an analog-digital signal.
First A / D conversion means for obtaining sampling code information, and second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information. Selecting means for decimating the second sampling code information to 1/2 so as to have the same timing as the first sampling code information, and difference information between the first sampling code information and output information of the selecting means. An encoding device comprising: difference information detecting means; and packing means for converting the first sampling code information and the difference information into a predetermined format. 2. A first A / D that obtains first sampling code information by sampling a two-channel analog signal at a predetermined sampling frequency and performing analog-digital conversion.
Conversion means; second A / D conversion means for sampling the analog signals of the two channels at a frequency twice the predetermined sampling frequency to perform analog-digital conversion to obtain second sampling code information; and the second sampling Selecting means for thinning out the code information to 1/2 so as to have the same timing as the first sampling code information, and difference information detecting means for obtaining difference information between the first sampling code information and output information of the selecting means, An encoding device comprising: sampling code information of the two channels and means for separately transmitting the difference information of the third channel. 3. An analog signal is sampled at a predetermined sampling frequency and converted into an analog-digital signal.
First A / D conversion means for obtaining sampling code information, and second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information. And outputting the first output information of every other sample obtained by thinning out the second sampling code information to 1/2 at the same timing as the first sampling code information, and the remaining one sample of the thinning out Selecting means for outputting every second output information, first difference information detecting means for obtaining difference information between the first sampling code information and the first output information of the selecting means, the first sampling code information or the first sampling code information Second difference information detecting means for obtaining difference information between the function information and the second output information of the selecting means, and the first sampling code information Encoding apparatus and packing means, with which a serial two difference information to a predetermined format. 4. An analog signal is sampled at a predetermined sampling frequency and converted into an analog-digital signal.
First A / D conversion means for obtaining sampling code information, and second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information. Selecting means for decimating the second sampling code information to 1/2 so as to have the same timing as the first sampling code information, and difference information between the first sampling code information and output information of the selecting means. An encoding device comprising: difference information detecting means; means for scaling the difference information for each predetermined frame; and packing means for making the first sampling code information and the difference information into a predetermined format. 5. An analog signal is sampled at a predetermined sampling frequency and analog-digital converted to obtain a first analog signal.
First A / D conversion means for obtaining sampling code information, and second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information. And outputting the first output information of every other sample obtained by thinning out the second sampling code information to 1/2 at the same timing as the first sampling code information, and the remaining one sample of the thinning out Selecting means for outputting every second output information, first difference information detecting means for obtaining difference information between the first sampling code information and the first output information of the selecting means, the first sampling code information or the first sampling code information Second difference information detecting means for obtaining difference information between the function information and the second output information of the selecting means, and the first and second difference information are predetermined. Means for scaling each frame, and a packing means for the said first sampling code information the first and second difference information to a predetermined format, having the encoding device. 6. An analog signal is sampled at a predetermined sampling frequency and analog-digital converted to obtain a first signal.
First A / D conversion means for obtaining sampling code information, and second A / D conversion means for sampling the analog signal at a frequency twice the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information. And outputting the first output information of every other sample obtained by thinning out the second sampling code information to 1/2 at the same timing as the first sampling code information, and the remaining one sample of the thinning out Selecting means for outputting every second output information; first difference information detecting means for obtaining difference information between the first sampling code information and the first output information of the selecting means; Predicting means for obtaining a predicted value; second difference information detecting means for obtaining difference information between the predicted value and the second output information of the selecting means; Means for scaling the first and second difference information for each predetermined frame, and a packing means for the said first sampling code information the first and second difference information to a predetermined format, having the encoding device. 7. An analog signal is sampled at a predetermined sampling frequency and analog-digital converted to obtain a first analog signal.
First A / D conversion means for obtaining sampling code information, and second A / D conversion means for sampling the analog signal at a frequency four times the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information. And a reference value determining unit that obtains a function of two consecutive sampling code information, or one of the sampling information itself or the function thereof as a reference value by using two consecutive sampling code information of the first sampling code information. A first difference information detecting means for detecting difference information between the first sampling code information and the second sampling code information at the same timing as the first sampling code information, and the reference value determining means. Of the reference value and the second sampling code information, the first sampling code information Second difference information detecting means for detecting difference information between an intermediate point of two consecutive sampling code information pieces of the information and those at the same timing; and the first sampling code information and the first and second difference information detecting means. And a packing unit that makes the difference information of each of them into a predetermined format. 8. An analog signal is sampled at a predetermined sampling frequency and converted into an analog-digital signal.
First A / D conversion means for obtaining sampling code information, and second A / D conversion means for sampling the analog signal at a frequency four times the predetermined sampling frequency and performing analog-digital conversion to obtain second sampling code information. Difference information detecting means for detecting difference information between the first sampling code information and the second sampling code information at the same timing as the first sampling code information, and the difference information detecting means of the second sampling code information. ADPCM except for the same timing as the first sampling code information
An encoding device comprising: an encoding means for encoding according to 1., and a packing means for converting the first sampling code information, the difference information from the difference information detecting means and an output signal of the encoding means into a predetermined format. 9. An analog signal is sampled at a predetermined sampling frequency and subjected to analog-digital conversion to be first sampling code information, and the analog signal is sampled at a frequency twice the predetermined sampling frequency to obtain an analog signal. The second sampling code information obtained by digital conversion is decimated to ½ at the same timing as the first sampling code information, and the thinned second sampling code information and the first sampling code information are combined. A decoding device that responds to information indicating the difference as difference information when the first sampling code information and the difference information are transmitted, and adds the transmitted difference information to the first sampling code information. And decodes half the sampling code information that is twice the first sampling code information. Means for decoding the double sampling code information from the decoding information, first D / A conversion means for digital-analog converting the first sampling code information at the predetermined sampling frequency, and the signal decoded by the decoding means. Using the above 2
A second D / A conversion means for performing digital-analog conversion at a double sampling frequency; 10. The first sampling code information is obtained by sampling a 2-channel analog signal at a predetermined sampling frequency and performing analog-digital conversion, and the 2-channel analog signal is doubled at the predetermined sampling frequency. The second sampling code information obtained by sampling at a frequency and performing analog-digital conversion is decimated to ½ so as to have the same timing as the first sampling code information, and the decimated second sampling code information and the second sampling code information. A decoding device that responds to the first sampling code information of the second channel and the difference information of the third channel when the information indicating the difference from the first sampling code information is used as the difference information. The added difference information is added to the first sampling code information to obtain the first sampling code information. Means for decoding half the sampling code information that is twice the pulling code information and decoding the sampling code information that is twice the decoding information; and digital-analog conversion of the first sampling code information at the predetermined sampling frequency. The first D / A conversion means for performing the above-mentioned 2
A second D / A conversion means for performing digital-analog conversion at a double sampling frequency; 11. An analog signal is sampled at a predetermined sampling frequency and subjected to analog-to-digital conversion to be first sampling code information, and the analog signal is sampled at a frequency twice as high as the predetermined sampling frequency. The second sampling code information obtained by digital conversion is decimated to ½ at the same timing as the first sampling code information, and the thinned second sampling code information and the first sampling code information are combined. The information indicating the difference is defined as the first difference information, and the first
The first sampling code information and the first sampling code information are used as second difference information, which is information indicating the difference between the sampling code information or the function information thereof and the information every other sample of the thinning.
And a decoding device which responds to the transmitted second difference information, wherein the transmitted first difference information is added to the first sampling code information to decode one of double sampling code information. Means for adding the second difference information transmitted to the decoded information, or adding the second difference information transmitted to the sampling code information or its function signal to obtain double sampling code information. Means for decoding the other, first D / A conversion means for performing digital-analog conversion on the first sampling code information at the predetermined sampling frequency, and using the signal decoded by the decoding means
A second D / A conversion means for performing digital-analog conversion at a double sampling frequency; 12. An analog signal is sampled at a predetermined sampling frequency and analog-digital converted into first sampling code information, and the analog signal is sampled at a frequency twice as high as the predetermined sampling frequency. The second sampling code information obtained by digital conversion is decimated to ½ at the same timing as the first sampling code information, and the thinned second sampling code information and the first sampling code information are combined. When the information indicating the difference is used as the difference information, the difference information is scaled for each predetermined frame, and when the first sampling code information and the difference information are transmitted, a decoding device that responds to them is provided. Means for controlling the value of the difference information using the scaled information that is controlled; Means for adding difference information to the first sampling code information, decoding half of the sampling code information twice the first sampling code information, and decoding the double sampling code information from the decoded information; A first D / A conversion means for digital-analog converting the first sampling code information at the predetermined sampling frequency; and a signal decoded by the decoding means,
A second D / A conversion means for performing digital-analog conversion at a double sampling frequency; 13. An analog signal is sampled at a predetermined sampling frequency and subjected to analog-digital conversion to be first sampling code information, and the analog signal is sampled at a frequency twice the predetermined sampling frequency. The second sampling code information obtained by digital conversion is decimated to ½ at the same timing as the first sampling code information, and the thinned second sampling code information and the first sampling code information are combined. The information indicating the difference is defined as the first difference information, and the first
The information indicating the difference between the sampling code information or the function information thereof and the information every other sample of the thinning-out is used as the second difference information, and the first and second difference information are scaled for each predetermined frame, A decoding device that responds to first sampling code information and the first and second difference information when the first and second difference information is transmitted. The decoding apparatus uses the transmitted scaling information to transmit the first and second difference information.
Means for controlling the value of the difference information; means for adding the controlled first difference information to the first sampling code information to decode one of the double sampling code information; Means for adding the second difference information, or adding the controlled second difference information to the sampling code information or a function signal thereof, and decoding the other of the doubled sampling code information; The first D / A conversion means for digital-analog converting the sampling code information at the predetermined sampling frequency, and the above-mentioned 2 by using the signal decoded by the decoding means.
A second D / A conversion means for performing digital-analog conversion at a double sampling frequency; 14. An analog signal is sampled at a predetermined sampling frequency and subjected to analog-digital conversion to be first sampling code information, and the analog signal is sampled at a frequency twice as high as the predetermined sampling frequency. The second sampling code information obtained by digital conversion is decimated to 1/2 at the same timing as the first sampling code information, and the thinned second sampling code information and the first sampling code information are combined. The information indicating the difference is defined as the first difference information, and the first
The information indicating the difference between the sampling code information or the function information thereof and the information every other sample of the thinning-out is used as the second difference information, and the first and second difference information are scaled for each predetermined frame, A decoding device that responds to first sampling code information and the first and second difference information when the first and second difference information is transmitted. The decoding apparatus uses the transmitted scaling information to transmit the first and second difference information.
Means for controlling the value of the difference information, means for adding the controlled first difference information to the first sampling code information, and decoding one of double sampling code information, and from the second sampling code information Means for obtaining a prediction value, means for adding the second difference information controlled to the prediction value, and decoding the other of the double sampling code information, and the first sampling code information at the predetermined sampling frequency. The first D / A conversion means for digital-analog conversion, and the above-mentioned 2 by using the signal decoded by the decoding means.
A second D / A conversion means for performing digital-analog conversion at a double sampling frequency; 15. An analog signal is sampled at a predetermined sampling frequency and subjected to analog-digital conversion to be first sampling code information, and the analog signal is sampled at a frequency four times as high as the predetermined sampling frequency. The digitally converted information is used as second sampling code information, and a reference value is calculated using one of the first sampling code information or two consecutive sampling code information to obtain the first sampling code information and the second sampling code information. Of the sampling code information, the difference information between the first sampling code information and the one having the same timing as the first sampling code information is defined as the first difference information, and two consecutive pieces of the first sampling code information of the reference value and the second sampling code information The difference information between the midpoint of the sampling code information and that at the same timing A decoding device that responds to the first sampling code information and the first and second difference information as second difference information when the first sampling code information and the first and second difference information are transmitted. Means for adding to the code information to decode a quarter of the second sampling code information, and using the first sampling code information one or two consecutive sampling code information, the reference value The second value is calculated using the reference value and the second difference information.
Means for decoding the value at the intermediate point of the sampling code information to decode another quarter of the second sampling code information; means for decoding a quarter of the second sampling code information; Interpolation processing means for decoding the remaining two quarters of the second sampling code information by using the output signal of the means for decoding the other one quarter of the second sampling code information, and each of the decoding means. And a means for selecting the output signal of the interpolation processing means to decode the second sampling code information, a first D / A conversion means for performing digital-analog conversion of the first sampling code information at the predetermined sampling frequency, Second D / A conversion for performing digital-analog conversion at the sampling frequency of 4 times using the signal decoded by the means for decoding the second sampling code information A decoding device having means. 16. An analog signal is sampled at a predetermined sampling frequency and analog-digital converted into first sampling code information, and the analog signal is sampled at a frequency four times as high as the predetermined sampling frequency. Digitally converted information is used as second sampling code information, and difference information between the first sampling code information and one of the second sampling code information at the same timing as the first sampling code information is detected, and the first sampling code information is detected. The sampling code information, the difference information, and the second sampling code information other than the same timing as the first sampling code information are AD
When an ADPCM signal encoded by PCM is transmitted,
A decoding device responsive to these, which adds the transmitted difference information to the first sampling code information and decodes a quarter of the second sampling code information, the ADPCM signal and the decoding ADPCM decoder for decoding the second sampling code information other than the same timing as the first sampling code information by using the output signal of the means, and switching the plurality of output signals of the decoding means and the ADPCM decoder. A means for outputting and decoding the second sampling code information; a first D / A converting means for digital-analog converting the first sampling code information at the predetermined sampling frequency; and a means for decoding the second sampling code information. The decoded signal is used to digitally sample the signal at a sampling frequency four times that described above. A first 2D / A converting means for log conversion has the decoding device. 17. A first A / D conversion means for sampling an analog signal at a predetermined sampling frequency and performing analog-digital conversion to obtain first sampling code information, and the analog signal is twice the predetermined sampling frequency. Second A / D conversion means for obtaining second sampling code information by performing analog-digital conversion by sampling at the frequency of, and halving the second sampling code information at the same timing as the first sampling code information. Selection means for thinning out, difference information detection means for obtaining difference information between the first sampling code information and output information of the selection means, and packing means for making the first sampling code information and the difference information into a predetermined format. , Encoding information in which a signal encoded by the encoding device having is recorded Rokusumi media. 18. A first A / A that obtains first sampling code information by sampling a two-channel analog signal at a predetermined sampling frequency and performing analog-digital conversion.
D conversion means, second A / D conversion means for obtaining second sampling code information by sampling the two-channel analog signals at a frequency twice the predetermined sampling frequency and performing analog-digital conversion on the analog signals. Selecting means for decimating the sampling code information to ½ so as to have the same timing as the first sampling code information, and difference information detecting means for obtaining difference information between the first sampling code information and output information of the selecting means. An encoded information recorded medium in which a signal encoded by an encoding device having the sampling code information of the 2nd channel and the means for separately transmitting the difference information as the 3rd channel is recorded. 19. A first A / D conversion means for sampling an analog signal at a predetermined sampling frequency and performing analog-digital conversion to obtain first sampling code information; and the analog signal being twice the predetermined sampling frequency. Second A / D conversion means for obtaining second sampling code information by sampling at the frequency of 2 and performing analog-digital conversion, and halving the second sampling code information so as to have the same timing as the first sampling code information. Selecting means for outputting the first output information for every other sample obtained by thinning, and outputting the second output information for every other sample for thinning, and the first sampling code information and the first for the selecting means. First difference information detecting means for obtaining difference information from output information, and the first sampling code information or its function information And a second difference information detecting means for obtaining difference information between the second output information of the selecting means and a packing means for making the first sampling code information and the two difference information into a predetermined format. An encoded information recorded medium on which an encoded signal is recorded. 20. A first A / D conversion means for sampling an analog signal at a predetermined sampling frequency and performing analog-digital conversion to obtain first sampling code information, and the analog signal is twice the predetermined sampling frequency. Second A / D conversion means for obtaining second sampling code information by performing analog-digital conversion by sampling at the frequency of, and halving the second sampling code information at the same timing as the first sampling code information. Selection means for thinning out, difference information detection means for obtaining difference information between the first sampling code information and output information of the selection means, means for scaling the difference information for each predetermined frame, and the first sampling code information And encoding means for packing the difference information in a predetermined format An encoded information recorded medium on which a signal encoded by a device is recorded. 21. A first A / D conversion means for sampling an analog signal at a predetermined sampling frequency and performing analog-digital conversion to obtain first sampling code information; and the analog signal being twice the predetermined sampling frequency. Second A / D conversion means for obtaining second sampling code information by performing analog-digital conversion by sampling at the frequency of, and halving the second sampling code information at the same timing as the first sampling code information. Selecting means for outputting first output information for every other sample obtained by thinning out and outputting second output information for every other one sample for thinning, first sampling code information, and first for the selecting means First difference information detecting means for obtaining difference information from output information, and the first sampling code information or its function information Second difference information detecting means for obtaining difference information between the second output information of the selecting means and the second output information of the selecting means, means for scaling the first and second difference information for each predetermined frame, the first sampling code information, and the first sampling code information. An encoded information recorded medium in which a signal encoded by an encoding device having a packing means for setting the first and second difference information in a predetermined format is recorded. 22. A first A / D conversion means for sampling an analog signal at a predetermined sampling frequency to perform analog-digital conversion to obtain first sampling code information, and the analog signal is twice the predetermined sampling frequency. Second A / D conversion means for obtaining second sampling code information by performing analog-digital conversion by sampling at the frequency of, and halving the second sampling code information at the same timing as the first sampling code information. Selecting means for outputting first output information for every other sample obtained by thinning out and outputting second output information for every other one sample for thinning, first sampling code information, and first for the selecting means First difference information detecting means for obtaining difference information from the output information, and its predicted value from the second sampling code information Predicting means for obtaining, second difference information detecting means for obtaining difference information between the predicted value and second output information of the selecting means, means for scaling the first and second difference information for each predetermined frame, An encoded information recorded medium in which a signal encoded by an encoding device is recorded, the recording medium having the first sampling code information and a packing unit that sets the first and second difference information in a predetermined format. 23. A first A / D conversion means for sampling an analog signal at a predetermined sampling frequency and performing analog-digital conversion to obtain first sampling code information; and the analog signal being four times the predetermined sampling frequency. Second A / D conversion means for obtaining second sampling code information by performing analog-digital conversion by sampling at the frequency of, and two consecutive sampling codes using the two consecutive sampling code information of the first sampling code information. A reference value determining unit that obtains a function of information, or any one of sampling information itself or a function thereof as a reference value, and the same timing as the first sampling code information among the first sampling code information and the second sampling code information. First difference information detecting means for detecting difference information from the difference And detecting difference information between the reference value from the reference value determining means and the second sampling code information at the same timing as the intermediate point between two consecutive sampling code information of the first sampling code information. The second difference information detecting means, and the first sampling code information and packing means for setting the respective difference information from the first and second difference information detecting means into a predetermined format are encoded by an encoding device. An encoded information recorded medium on which a signal is recorded. 24. A first A / D conversion means for sampling an analog signal at a predetermined sampling frequency and performing analog-digital conversion to obtain first sampling code information; and the analog signal being 4 times the predetermined sampling frequency. Second A / D conversion means for sampling at a frequency of 2 to perform analog-digital conversion to obtain second sampling code information, and two consecutive sampling codes using the two consecutive sampling code information of the first sampling code information A reference value determining unit that obtains a function of information, or any one of sampling information itself or a function thereof as a reference value, and the same timing as the first sampling code information among the first sampling code information and the second sampling code information. First difference information detecting means for detecting difference information from the difference And detecting difference information between the reference value from the reference value determining means and the second sampling code information at the same timing as the intermediate point between two consecutive sampling code information of the first sampling code information. The second difference information detecting means, and the first sampling code information and packing means for setting the respective difference information from the first and second difference information detecting means into a predetermined format are encoded by an encoding device. An encoded information recorded medium on which a signal is recorded.