KR100209865B1 - Storage device for digital data storage - Google Patents

Abstract

The present application describes a storage device and a decoding device for use with a medium having multiple parallel storage tracks. Error protection is provided by the result codes of the C1 code word and the C2 code word. C1 code words are assigned to one memory segment in one memory track, respectively. C2 code words are executed cyclically through all tracks and across the intersegment boundaries. The physical space of the C2 code word symbol is almost uniform in all coordinate directions. Memory requirements for decoding can be minimized.

Description

Memory

1 is a diagram of a primary data tape frame format in accordance with the present invention.

2 is a block diagram of a reader device in accordance with the present invention, changing slightly to encoding storage.

3 is a schematic diagram of a RAM segment accessing the device.

4 is a diagram showing data arrangement on a tape.

5 is the same figure of RAM.

6 and 6a are C2 word layouts on a tape.

7 is a diagram further illustrating the use of the present invention.

Table 1 formulates the placement of user data on tape.

* Explanation of symbols for main parts of the drawings

32: mechanism 38: counting block

42: decoder 46: encoder

The present invention relates to a storage device for storing digital data on a multitrack storage medium. In particular, the medium may be a magnetic cassette tape having a plurality of medical tracks. Alternatively, the track can be effectively continuous spiral rotation on the disk, such as an optical recording disk.

The storage of digital data is sensitive as it is known for the truncation represented by a long series of bits along a particular track, which can operate at any arbitrary level of level or with a high probability of error. BCH codes for finite fields have been tested for advantageous error protection media, especially Reed-Solomon codes, where each symbol is defined for a multi-symbol word, an 8-bit element of the Galois field. code) is systematic on this symbol level. One skilled in the art can eliminate many of these limitations without departing from the general concept of the invention.

In particular, the present invention contemplates an apparatus of the described kind that provides an appropriate degree of protection with encoding and decoding of moderate complexity and realizes this protection in a regular format. According to one aspect of the present invention, the present invention provides a first symbol correction code and a second code defined for a first code word (C1 code word) in which the first and second symbol correction codes are formed together to form a result code. By using a second symbol correction code defined for a word (C2 code word), digital data is stored in a storage medium having a first plurality of storage tracks of a common almost uniform geometry under the execution of an error protection encoding operation. Wherein the storage device comprises first encoding means for said first code for generating an error protection C1 code word assigned to a particular single track, and according to successive symbols of a particular C2 code. Has second encoding means for a second code for generating an error protection C2 code assigned to all of said first plurality of tracks according to a cyclic cycle, said C2 code being said 1 has a plurality of symbols up to a plurality of times, and the device is substantially uniform in space between the symbols of the latter C2 code word between physically neighboring symbols on the storage medium and along the track. And physical alignment means for arranging C2 codes such that they have non-zero components across. In particular, it can be seen that the number of symbols in the C2 code word is a plurality of the correct variety. This allows for a systematic setup. On the other hand, truncated C2 code words can likewise be used advantageously, with the remainder of the non-used symbols being marked by a Fidelity Zero or other established information that does not need to be specifically stored. In particular, this storage format provides robustness against column errors that interfere with the majority of the data on any single track and column errors that impede large numbers of code symbols that are written at the same time if the write lines are ignored. In addition, the firmness to the drop patch of the medium is thus embodied.

Advantageously, of the non-zero components, track-crossing components are derived from uniform track crossing jumps between tracks of integers and successive symbols of the C2 code word being of the first plurality of modulo values. This allows for easy address calculation.

Advantageously, of the non-zero components, components along the track are derived from jumps along the uniform track between successive symbols of the C2 code words.

This also simplifies address calculation.

Preferably, recording means are provided for magnetic recording on parallel tracks which are tape tracks. On its own, good quality tapes thus permit high-density memory and high-rate transfer. Nevertheless, it has been experimentally demonstrated that the bit wavelength may have been kept large enough to allow the use of standard quality tapes; Compared to other systems with fixed-head digital audio recording, no high-quality tape is needed. In comparison with the above, the use of the present invention can be implemented for a disc format, and will not be limited to magnetic recording. On disk, the largest track-to-track distance during overall coding may be less compared to the average track radius.

Preferably, the recording means interfaces with multiple tracks as tracks in close proximity to each other. Relative positioning is unnecessary, and the memory density that can be obtained is improved.

Preferably, the first plurality of tracks are deposited on one-half of the tape and within the first plurality of tracks, the outer edge tracks on the tape are completely filled by parry's symbols each appended to the associated C2 code word. . The outer track is slightly more sensitive to cutting, thus reducing the overall susceptibility.

Preferably, each track has a series of outputs, each containing the same integer of C1 code words, where the integer is 2, and within any block the C1 code words of the block are two-independent. This improves the identity of the memory configuration.

Preferably, apart from tape skew, the physical arrangement of C1 words between the first plurality of tracks is mutually synchronous. This lowers the conditions for buffering in the recording electronics.

Preferably, apart from tape skew, the physical arrangement of the blocks between the first plurality of tracks is mutually synchronous, and in each track a second plurality of blocks are included in a uniformly sized tape segment, and 2 uniform sized tape frames include a third plurality of tape segments, the tape segments and tape frames being synchronous with each other between the first plurality of tracks, and the C2 code being a single tape frame. Fully included This further improves the identity of the memory configuration.

Preferably, blocks of mutual synchronization form one piece between the tracks, with each C2 code word evenly distributed over all pieces of one frame. This also improves identity.

Storing the user data of the fourth plurality of tape segments, ie, the input RAM segment for receiving user data of the intended tape segment, and the corresponding data of the corresponding set of intended tape segments, and encoding the associated C1 and C2 code words. Another RAM segment series and a RAM encoding memory for storing a storage amount of an output RAM segment for outputting a fully encoded tape segment. While the C2 code words may be sorted through multiple RAM segments, the total required storage capacity is only two RAM segments more than the resin covered by the expansion of the C2 code words.

Preferably, the first plurality of eights. This is a good tradeoff between its transfer rate and moderate device complexity.

Preferably, the C1 code is (24, 20, 5) code and the C2 code is (32, 26, 7) code. In combination with these codes, especially result codes, they provide immunity against a wide range of errors. Nevertheless, the mechanical complexity of performing correction and / or detection of errors remains simple. In particular, it has been found that even if the codes have somewhat different distances, the odd-distance code cooperates better than the even-distance code.

Preferably, each frame contains 384C2 code words. Here, the simple configuration and the large capacity of the memory are balanced.

Preferably, a non-zero component across the track derives the first plurality of codes from the jump +5 module. This allows for simple addressing processing.

Preferably, the medium is a reversible storage medium.

The present invention is an emulating device for emulating a device as described above, for interfacing to an intended storage medium, which transmits a result code entity using an encoding device and broadcast or physical derivation means for performing said encoding operation. It is equipped with a transmission means which is supplied by the encoding means for this purpose.

In particular, the present invention can be used when suitable storage is a country, for example, controlled by a different presence at the receiving side of the broadcast link. Coordination of encoding and story may together constitute the storage device. The encoding operates as if the medium had been provided effectively. The transmission may be by broadcast, cable, optical or other means.

Preferably, the apparatus comprises means for receiving an analog audio signal and an analogue supplied by the receiving means for providing, by A / D conversion, at least a substantial portion of the digital data for subsequent encoding by the result code. And digital conversion means. The conversion of direct audio to coded data provides interference to valid counter-measurements by external disturbances.

The present invention relates to an apparatus for use by the one or more of the re-quoted or emulating the storage medium, comprising access means for accessing the actual or all of the emulated storage medium together with forming an minimal result code block. Internal storage means for accommodating all data contained in the first set of C1 code words and the second set of C2 word words, first decoding means for decoding the C1 code words in the first set, and any particular single In decoding a C2 code word, provided with access means for accessing said storage means corresponding to a physically medium portion with a nearly uniform inter-neighbor spacing that has non-zero components all along the track and across the track. Second decoding means.

The storage medium may be physically associated with the decoding, but may exist as in the encoding device. The sequence may be an encoding-storing-broadcast or other transmission. The same benefits will appear to have different structural models.

The present invention relates to a reader device for reading and decoding such digital data. The reading device generally reflects the subsequent procedure in encoding. Advantageously, such a reader device comprises a multi-segment RAM memory and a filling means for sequentially filling a predetermined second plurality of RAM segments with data from the entity or emulated storage medium, the code words being stored in one single segment. Exclusively assigned, C2 code words are exclusively assigned to a single multi-segment RAM frame, and C2 code words are assigned to uniform row jumps and uniform column jumps through the modularized value of the RAM frame at the first number of RAM frames. It is intended to be executed. This requires a fairly low storage capacity.

Advantageously, each memory segment comprises its multi-segment RAM memory, each RAM segment receiving a third plurality of C1 code words that are uniformly distributed and evenly among the first plurality of tracks exclusively related to a single media segment. Thus, some storage media segments correspond one-to-one on a RAM segment, and a third uniform plurality of C1 code words fill each memory segment directly to enable decoding of the available C1 code words in the memory segment. A first decoding means for said device is additionally provided. Fast operation of decoding reduces the time lag between playback and readout of the stored information.

Advantageously, the C2 code word being stored crosses the internal memory segment boundary with the third plurality of memory segments but does not do so with the other internal memory segment boundary, and the storage and first decode of the C2 code word in the third plurality of memory segments. After decoding by the means, the apparatus has second decoding means for activating the decoding of the C2 code word. The time lag by this method is also low.

Advantageously, the memory is accommodated in addition to the first plurality of memory segments, one additional input segment for inputting data of one storage medium segment and one additional second for outputting one data. The segment already decodes the storage medium segment. For example, a current four segment frame only requires six segment memory. The modern advantage clearly has its counterpart in the previously described storage device.

The present invention relates to an information reproducing apparatus and comprises a decoding apparatus as recited above. Holding / drive means for the storage medium in the form of a magnetic tape, head means for continuously accessing a range of positions on the tape in time, and audio reproducing means provided in the decoding device. Such devices represent consumer entertainment devices of real price for general use. In particular, the decoder part is included in a single additive embodiment.

The present invention relates to a single storage medium for use with a decoding apparatus as described above, and having the first plurality of uniform storage tracks, the track being disposed on half of a medium that is a magnetic tape, And a storage frame evenly distributed in the parallel tracks, and protected by a symbol correction block generation code represented by the frame C1 word and C2 word, each C1 word is distributed in exactly one of the tracks, and each C2 word is That the C2 word has a number of symbols to obtain a first plurality of multiplexing, that the physical space between adjacent symbols of the latter C2 word is nearly constant and has nonzero elements along and across the track In the front of the track is distributed. Again, the number of C2 word symbols can also lead to a first plurality of multiplexing.

The present invention relates to a storage medium as described above, and is contained in a cassette connected to the apparatus described previously.

Many advantages are cited in the dependent claims.

The invention will be described in detail hereinafter with reference to the preferred embodiments shown in the accompanying drawings. In particular, the first data format and associated decoding and vice versa are described. The error protection code format is described in detail later.

Figure 1 shows the main data allocation, which is user data plus relevant redundant data. The user byte (or symbol) is counted continuously. Their internal organization is not taken into account, but they can be obtained from digitized single or dual channel audio, video, data and the like. Each byte D has three indexes t, b, i, i.e., track number t in intervals [0, 7], tape block number U in intervals [0, 31], and symbol number 1 in intervals [0, 47]. . The number of user data bytes in a tape frame is 8192. The batch of bytes according to the batch number U of [0, 8191] is confirmed by the formula in Table 1. The usage is made up of two intervariables d and e, where e is the number of segments and d is the number in the segment in question. In addition, 128 system information symbols are received to give a total of 8320 spare symbols in the generation code block. The RAM described below is 32 columns of 384 rows for accommodating 12288 symbols respectively. Therefore, the number of extra symbols is 12288-8320 = 3968 symbols. Since several spare symbols are part of two code words, the number is lower than the sum of the spare symbols of each C1 code word and C2 code word. In fact, the above is due to the principle of generation codes.

At present, as shown in FIG. 1, 8 tracks 0 ... 7 are provided for storage on the tape. The data, including the redundant error protection data, is moved to a unit called a tape frame. Each tape frame, indicated by arrow 20, contains all eight tracks. Each tape frame is divided into 32 consecutive tape slices, shown as columns. Each tape 5 slice contains 8 tape blocks, ie one tape block per track. One tape frame is also divided into four frame segments containing eight consecutive slices for the tape frame in question. The frame segment is not shown in the figure. One tape block 22 corresponds to unmodulated 408 primary data bits modulated with 510 channel bits. In short, modulation to channel bits is not described further, and the following considerations apply only to unmodulated bits. On the tape, the corresponding tape blocks of the other tracks are arranged as shown. Each tape block consists of a 10-bit sync pattern, an unmodulated 8-bit numbering symbol, and an unmodulated 8-bit parity symbol carrying 48 major symbols. The resulting considerations are limited to the last 48 symbols per block, 48x32x8 = 3x2 ₁₂ = 12288 per frame. The code used will be described below.

2 is a block diagram of a decoder device embodiment. The tape 30 is read simultaneously with a tape access mechanism 32 that performs modulation in eight parallel tracks. Block 34, driven by an unillustrated synchronous mechanism, divides the bytes, segments, and frames into equal parts. RAM 36 has 6 RAM segments or pages counted from 0-5. Writing the address in successive increments and also gate the data to the RAM 36 is provided by the count block 34. Likewise, coefficient block 38 includes gated data reads on user lines in RAM 36 and read addresses in successive increments. In this method, the RAM 36 is a first-in, first-out buffer associated with the user data. As shown symbolically, block 42 is a C1 decoder that is accessed in RAM 36 in both directions via access facility 40. Likewise, block 46 is a C2 decoder that is accessed in RAM 36 in both directions via its access facility 44. In view of the above, FIG. 3 schematically illustrates the segment directional access of the RAM 36 with the counter / gate mechanism 34 writing. Since the time moves from left to right in the figure, all six RAM pages are filled or overwritten in a periodic sequence. The physical nature of the segments in the RAM structure is discontinuous for the decoding organization. In FIG. 3, row 62 illustrates the decoding operation by the C1 decoder 42. Decoder 42 receives a synchronization signal from counter / gate mechanism 34 on line 48, and as a result, recognizes the moment when a complete segment fills RAM 36 and its address (range). Currently each C1 code of 24 symbols (bytes) is completely contained within one tape segment and each tape segment is placed one-to-one on a single RAM segment, where the C1 decoding can be performed directly on the most recently received tape segment. Can be. As shown in row 62, this leads to a periodic continuation delayed by one segment spacing relative to row 60. Furthermore, the C1 decoder operates because 32 C symbols of each C2 code word are completely contained within one tape frame of four tape segments and each tape frame by segment placement is placed one on one on four consecutive RAM segments. Once finished (whether the correction is good or not), the C2 decoding can be performed directly on 4 segments after the last one is received. In row 60, small arrows indicate frame boundaries. As shown on row 64, the C2 decoding is performed during a single segment following full reception for the frame in question. As shown in FIG. 2, C2 decoder 46 synchronizes with counter / gate 35 over line 48, and further receives a ready signal from C1 decoder 42 on line 50. . When the C2 decoder finishes operation, line 52 sends a free signal to output counter / gate 38. Alternatively, the latter is unconditionally synchronized via a signal on line 48. Row 66 shows that the operation of the C2 decoder 46 is followed by reading the access on four consecutive RAM segments processed during the most recent operation of the C2 decoder 46. Therefore, the four tape segments received through the interval 70 are output through the interval 70. As a result, all arrangements in FIG. 2 operate with error correction (FIFO) with delays incurred at five tape segment intervals. It is clear that 6 RAM segments are necessary and sufficient for storage. If the C2 decoding takes a lot of time, then the storage element, which takes 2 or 3 tape segment intervals as an example, reaches 7 or 8 RAM segments, respectively. In FIG. 2, the RAM 36 has four port facilities. Because decoders 42 and 46 operate alternatively, each operation is placed on a single piece of hardware that is suitably programmed. Moreover, because of the writing of the counter / gate segment 34, the reading of the counter / gate element 38 and the decoding of the decoders 42 and 46, the RAM 36 never occurs on the same RAM segment, segment level, (36) is not limited to one port facility.

In this case, if the C2 words do not have their sufficient length, the decoding may time somewhat earlier. The end of the word may be indicated by, for example, an external signal not shown derived from the modulated signal.

The set-up described above may include, for example, an unillustrated reset functionality that becomes active by recognizing the correct approach of the first frame. The signal may be signaled to the first frame start encountered after the block header can be shown correctly. Moreover, as described below, the C1 code words are limited to only one block of each. Thus, it may be possible to use a slight acceleration in which C1 decoding is started immediately after the relevant block. The evaluation of the operation indicates that the additional cost of more complex control arrangements does not add to the added benefit, but the opposite may occur.

The arrangement of FIG. 2 is described with respect to the decoding of data read from the tape present on the user output 54. Smaller devices may be used with respect to encoding after C1 encoding is performed by encoder 46, because C1 encoding is performed by output 42. As shown in FIG. The change to be implemented would be the line / device 32, the interface would be the user, and the line 54 would be tape. Alternatively, line / element 32 may be bidirectional besides line 54, but allows input into RAM into a multiplexer fed by either line 32 or line 54. In contrast, the output of the RAM causes the multiplexer to either line 54 or line 32. As another variation, the redundancy that occurs is somewhat less relaxed than decoding, so that elements 42 and 46 can be simplified. For example, a feedback operation that does not require unexpected measures, such as correctable errors in C2 words, is needed. Combined symbol modifications result in a result code system. This means that in order to encode, the time sequence encoding two codes is illogical, i.e., after the user data of the entire segment has reached RAM, the C1 code words are first calculated to have their redundancy, or alternatively In other words, the C2 code word is the first one to have. Conceptually, the user data of the result code can be specified as a matrix. The redundancy is composed of three parts. In other words,

a. Redundancy symbol in line

b. Redundancy symbol according to heat

c. Double redundant symbols according to redundant columns, such as double redundant symbols according to redundant rows.

In addition, considerations such as reading also apply to writing. For the sake of simplicity, the points are not stated for various electromechanical considerations such as stop / drive of tape, feedback looping with speed, head structure, etc. Details of RAM addressing will be described below.

4 shows data mapping on a tape, in particular on one frame with four tape segments A ... D, each tape segment being placed on each of eight tracks 0 ... 7 Have the same size part. Within each tape segment, each two-track segment is shown hatched in such a way that one track segment is hatched on each track.

Now, Figure 5 shows data mapping of the same tape frame in four RAM segments AO, BO, CO, and DO, where the total contents of one tape segment are exclusively placed on a similarly marked RAM segment, such as A to A ₀ . Illustrated. Since the remaining two RAM segments according to FIGS. 2 and 3 do not contribute to the result code of the frame in consideration now, considerations regarding the tape frame in question can be ignored. Since the vertical scale in FIG. 4 (track number) corresponds to the horizontal scale in FIG. 5 (memory rows in each RAM segment, as shown at the bottom edge), in each tape segment of FIG. It will be noted that the horizontal scale of is magnified vertically within FIG. 5 for clarity, as indicated by the larger area of FIG. 5 compared to that of FIG. Now, the display of FIG. 5 has been adopted to illustrate the logical structure of the storage device. As a practical matter, physical limitations, in particular the address ranges available, may be different, but lead to physical devices that can be achieved by basic address translation. First, FIG. 5 now shows each mapping of hatched track segments of FIG. 4 on a row of corresponding RAM segments, and shows each mapping of hatched track segments, and continues the orientation of hatching. As shown, the RAM has 32 columns (1 .... 31) and 384 (= 8 × 48) rows (0 .... 383), each of which is numbered as one symbol that is easy to handle. Ranked. As shown, the mapping is one-to-one, and the column number in the RAM segment is equal to (t * 5) mode 8 + 8. The column number of the completed RAM is obtained by adding 8 times the number of segments 0, 1, 2, and 3 to the RAM segments AO, BO, CO, and DO, respectively. T is always a track number. For example, for t = 5 in the tape segment, the number of columns of RAM function is (5 × 5) mode 8 = 1, as shown by the arrow. The mapping in the other direction is the same as in RAM segment BO because track 1 is mapped to column 5.

Second, the C1 code placement in RAM is considered. Each block of 408 unmodulated bits now has two (2) code words of 24 symbols (and three other symbols, not relevant herein) in each. These two code words have two-interleaves in which odd numbered symbols belong to one code word and even numbered symbols belong to the other word. This also applies to the thin redundancy symbol in each block, which is the last symbol of the block (the rightmost one in FIG. 1) on the tape. therefore. In RAM they fill the bottom of each set of 48 rows.

Third, the placement of C2 code words in RAM is considered. FIG. 5 shows one individual code word starting with the symbol on row 0, column 0. FIG. Thereafter, the row jump is 48 and the column jump is one. As such, each next symbol is associated with a different track. Each next symbol also jumps by one block in the tape track direction. Cross track jump is 8 (without rounding) with plus (+) 5 track modulo. For one code word in question, all symbols are highlighted in FIG. 3 as shaded squares. Switching to another code word shifts all symbols through a uniform number of rows (rotating between the upper and lower edges) and / or a second, uniform number of columns (rotating between the left and right edges). Is executed.

In relation to the above, FIG. 6 shows the placement of the eighteenth symbol of the C2 code word highlighted in FIG. 5, with each cross representing a symbol of one of the blocks of the 48 symbols in question. Each next symbol is now in the next tape block sequence and is shifted through five tape tracks (mode 8) without rounding up or down. For simplicity, the location of each symbol in their associated block is not shown. As can be clearly seen, based on the block, the physical spacing between neighboring code symbols is nearly uniform. In an exemplary embodiment, the faced tape speed is 4.76 cms / sec at a bit rate of 96 kilobits / second. This results in a bit length of 0.495 microns. Track pitch was intended for 195 microns, which means that in such longitudinal recording, the beat area is generally shorter than the width. Each tape block now has 510 channel bits, which is a block length of 253 microns, meaning that the area covered by the block is 253 x 195 microns, which is almost forward. Thus, the uniform spacing in FIG. 6 effectively shifts to nearly uniform spacing between each neighboring code symbol of the C2 code word. In this regard, Figure 6a shows the center-to-center spacing between neighboring symbols of C2 code words, in three viable associated configurations. The symbols are shown as vertical bars in their blocks with only the corners indicated by dots. The relative center-to-center spacing of 640, 780 microns is related to 1: 1.22. Other relationships, such as 1: 1.3 or even 1: 1.4, may be considered as bringing a nearly uniform distance between the nearest neighbors. This figure considers that the code symbols within their respective blocks have the same position. Uniform spacing indicates good robustness of the code against scratches and other burst-type errors. Effectiveness, a C2 code with a spacing of 7 at six redundancy symbols (n, K = 32.26) can be corrected with six erase symbols in the word. The above applies if the C1 code is provided as a point in a symbol that is made incompletely in the word in question. In this case, the circle surrounding those six symbols in FIG. 6 with 100% deletion in this specification will not cause a breakdown of the error correction capability. In FIG. 6, this would correspond to the width of any six blocks on a row that is 1.5 millimeters, fully considered for almost all purposes. Even if the layout was changed to disk age storage, the same convenient features could be realized, provided that the ratio of the diameter of the outer track to the diameter of the inner track was approximately equal to one. As a practical matter, a ratio of 1.1 or even higher can easily be satisfied.

The dimensions are also completely filled with redundancy symbols of the C2 code to increase the robustness of the code format, i.e. for the highlighted codeword of FIG. 5, it is the symbol number (0, 8, 16, 24) on the top row of the RAM memory. Denotes all code symbols 4 having What I just said applies to all other C2 code words because the first symbol for it is always assigned to the innermost segment string. Moreover, another parity symbol has the following matrix. That is, for even C2 code words (0, 2 .... 382), they are positioned by symbols 7, 23. For odd C2 code words (1, 3 ... 383), redundant words are also positioned with symbols 15, 31. This means that all of these other redundant symbols are placed on track 3, which is just 50% covered with parity symbols.

The advantage of completely filling track 0 with redundant symbols can be seen as follows. With a width of about 1.2 millimeters, the set of eight tracks reviewed in advance covers half the width of the 1/8 tape. For use in reverse, the second set of tracks is provided with the other half width of the tape in the same format. Now, both tracks 0 run outside of the appropriate recording tracks, and are generally more or less exposed to interference and tape wear. Now, in the case where only one outer track is made incomplete, the remaining data preservation will be signaled by performing a correction of the C2 code, while the C2 code will be a non-recoverable signal for the outer track.

7 illustrates the use of the present invention in various embodiments and descriptions. Block 100 is a suitable source for analog audio signals. This can be, for example, a naturally occurring audio source such as an audio record player, loudspeaker, or orchestra. Block 102 represents audio inputs in the system, such as microphone or wire connections, as well as associated audio amplification, filtering, and the like. Block 104 represents an analog-to-digital conversion of audio samples taken from element 102. Block 106 represents the encoding already referenced by reference to the digital processing rules, echoing RAM. Block 108 represents a formatting element for encoded data by generating a tape segment. The above can be output in a variety of different ways, such as in parallel for the eight modes. Alternatively, such parallel 8-bit bytes can be broadcast as a single bit-width serial for broadcast, cable or optical waveguide transmission. Block 110 represents a combined broadcast amplifier, broadcast media and broadcast receiver. Alternatively, such a device may be adapted for cable or waveguide use. Further alternatively, a magnetic head may be provided for writing and reading, respectively, for magnetomotoric storage on a digital audio tape. The audio tape, or alternatively the audio disc, may be housed in a cassette of the same size or envelope as a suitable box in the form of protection needs, resistance requirements, access and commercial broadcast promotion. If necessary, the readhead and the writehead may be built in, or may be combined into a single head or a headset. Block 112 represents a decoding device with decoding RAM. Block 114 represents the output mechanism including D / A conversion, de-interleaving, amplification and amplification as needed. Block 118 represents the driving mechanism at the generation side of encoded data, such as for example, tape travel. Block 118 represents the drive mechanism configured thereon at the receiving end for the encoded data. In some commercial structures, such as double-sided recorders, the drive mechanism may be incorporated into a single drive mechanism. For the sake of brevity, various structural and structural details have been preceded. It will be noted that the producing side behaves as if the receiving side really exists as it emulates the existence of the receiving side, ie it behaves as if the receiving side exists. In addition, the receiving side emulates the transmitting side, i.e. acts as if the transmitting side is present.

Claims (11)

Almost uniform to each other under execution of the error protection encoding operation by the first symbol correction code defined for the first code word (C1 code word) and the second symbol correction code defined for the second code word (C2 code word). A storage device for storing digital data on a storage medium that is a first plurality of storage tracks of geometry, wherein both the first and third symbol correction codes constitute a result code, and the storage device stores a specific single track. Respectively assigned to the first plurality of track modes according to a cyclic cycle according to the first encoding means and successive symbols of any particular C2 code word for the first code for generating the error protection C1 code word respectively assigned to. A plurality of shims having a second encoding means for the second code for generating an error protection C2 code, the C2 code being a multiple of the first plurality; Ball, so that the device has a non-zero component between the symbols of the latter C2 code word and the space between physically neighboring symbols on the storage medium is nearly uniform and along the track and across the track. And a physical serving means for arranging C2 codes. The digital memory storage device as set forth in claim 1, wherein said plurality of symbols in a C2 code word are an exact multiple of said first plurality. 2. The non-zero component of claim 1, wherein the cross-track component obtains the first majority from uniform cross-track jump paths between successive symbols of the C2 codewords, wherein the track module is an integer track module. And a component along the track is obtained from a different jump in a uniform track between successive symbols of the C2 code word. 4. A method according to any one of claims 1 to 3, wherein each track has a series of blocks, each block comprising a uniform integer C1 code word, wherein said integer is 2 and within that block C1. A digital memory storage device characterized in that a code word is two-interleaved. 5. The method of claim 4, wherein apart from tape skew, the physical arrangement of the blocks between the first plurality of tracks is mutually synchronous, with a second plurality of blocks being included in a uniformly sized tape segment in each track. And a third plurality of tape segments in a second uniform sized tape frame, wherein the tape segment and the tape frame are mutually synchronous between the first plurality of tracks, and the C2 code word Digital storage device characterized in that it is completely contained in a single tape frame. 6. The method of claim 5, further comprising storing a user data of a fourth plurality of tape segments, i.e., an input RAM segment for receiving user data of an intended tape segment, and a corresponding series of intended tape segments, and the associated C1 and C2 codes. And a RAM encoding memory for storing a memory segment of a RAM segment series for encoding a word and an output RAM segment for outputting a fully encoded tape segment. 1st to 3rd. 6. The apparatus according to any one of claims 5 to 7, further comprising receiving means for an analog audio signal, provided by said receiving means for A / D conversion having at least a substantial portion of said digital data for subsequent encoding by said result code. Digital storage device characterized in that. A decoding device used as the storage device according to any one of claims 1 to 3 and 5, comprising: access means for accessing the actual or emulated storage medium, a first set of C1 codewords, and a C2 code Internal storage means for accommodating all the data contained in the second set of first, first decoding means for decoding the C1 code word in the first set, and second decoding the C2 code word in the second set; Two decoding means, wherein the first and second sets together constitute a minimum result code block and access the storage means as if the second decoding means physically correspond to a medium location having a substantially uniform inter-neighbor spacing. And accessing means for decoding any particular single C2 word. 6. The method of any one of claims 1 to 3 and 5, further comprising: fIlling for sequentially filling a predetermined second plurality of RAM segments with multisegment RAM memory and data from the actual or emulated storage medium. Means, wherein the C1 code word is exclusively assigned to one single segment, the C2 code word is exclusively assigned to one single multisegment RAM frame, and the C2 code word recalls the dimensions of the RAM frame. And a RAM frame configured to operate with uniform row jumps and uniform column jumps through the module. 9. The method of claim 8, comprising a multi-segment RAM memory, wherein each RAM segment is uniformly distributed among the first plurality of tracks as exclusively associated with a single media segment. First decode means for accommodating words, so that any storage segment is 1: 1 matched to the RAM segment, and also directly activates the decoding of the C1 code word available in the memory segment when the memory segment is filling Decoding device characterized in that further equipped with. 12. The apparatus of claim 10, wherein when stored, the C2 code word crossing an intra-memory segment is bounded up to a third plurality of memory segments but other intra-memory segments are not bounded. Second decoding means for activating the decoding of the C2 code words after storage by the first decode means and the storage of the C2 code words in a plurality of memory segments, wherein the memory comprises: the third plurality of memory segments; In addition, the decoding device characterized in that one storage medium segment accommodates another input segment for inputting data and another second segment for outputting data of one already decoded storage medium segment. .