Encoding recording data on optical disks

Abstract

An encoding method for recording gap regions or sectors having repeated data is disclosed. At least one sector is entirely encoded and stored in a memory buffer of the optical recording system. If the currently encoded are gap regions or sector having repeated data embedded in the fields of user data, only those portions affected by the modified header will be encoded to derive associated P code and Q code. The error detection code is firstly generated in the mode 1 standard when a gap region is encoded. P code is then encoded for those regions affected by the sequentially modified header and error detection code, while associated Q code is then derived according the modified header, error detection code, and P code. In the mode 2 form 1 and mode form 2 standards, only those regions affected by the sequentially modified header should be re-encoded again. Since the remaining portions employ the same data as the last encoded one in the memory buffer so that the encoding performance would be significantly upgraded whatever encoding standards are employed.

Description

a dictateTABLE 1 PRIOR ART C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 R0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 R1 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 R2 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 R3 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 R4 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 R5 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 R6 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 R7 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 R8 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 R9 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 R10 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 R11 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 R12 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 R13 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 R14 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 R15 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 R16 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 R17 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 R18 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 R19 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 R20 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 R21 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 R22 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 R23 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 R24 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 R25 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 R26 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 R27 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 R0 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 R1 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 R2 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 R3 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 R4 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 R5 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 R6 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 R7 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 R8 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 R9 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 R10 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 R11 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 R12 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 R13 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 R14 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 R15 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 R16 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 R17 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 R18 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 R19 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 R20 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 R21 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 R22 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 R23 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 R24 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 R25 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 R26 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 R27 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 R0 30 31 32 33 34 35 36 37 38 39 40 41 42 R1 73 74 75 76 77 78 79 80 81 82 83 84 85 R2 116 117 118 119 120 121 122 123 124 125 126 127 128 R3 159 160 161 162 163 164 165 166 167 168 169 170 171 R4 202 203 204 205 206 207 208 209 210 211 212 213 214 R5 245 246 247 248 249 250 251 252 253 254 255 256 257 R6 288 289 290 291 292 293 294 295 296 297 298 299 300 R7 331 332 333 334 335 336 337 338 339 340 341 342 343 R8 374 375 376 377 378 379 380 381 382 383 384 385 386 R9 417 418 419 420 421 422 423 424 425 426 427 428 429 R10 460 461 462 463 464 465 466 467 468 469 470 471 472 R11 503 504 505 506 507 508 509 510 511 512 513 514 515 R12 546 547 548 549 550 551 552 553 554 555 556 557 558 R13 589 590 591 592 593 594 595 596 597 598 599 600 601 R14 632 633 634 635 636 637 638 639 640 641 642 643 644 R15 675 676 677 678 679 680 681 682 683 684 685 686 687 R16 718 719 720 721 722 723 724 725 726 727 728 729 730 R17 761 762 763 764 765 766 767 768 769 770 771 772 773 R18 804 805 806 807 808 809 810 811 812 813 814 815 816 R19 847 848 849 850 851 852 853 854 855 856 857 858 859 R20 890 891 892 893 894 895 896 897 898 899 900 901 902 R21 933 934 935 936 937 938 939 940 941 942 943 944 945 R22 976 977 978 979 980 981 982 983 984 985 986 987 988 R23 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 R24 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 R25 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 R26 R27

TABLE 2
PRIOR ART
	C′0	C′1	C′2	C′3	C′4	C′5	C′6	C′7	C′8	C′9	C′10	C′11	C′12	C′13	C′14
R′0	0	44	88	132	176	220	264	308	352	396	440	484	528	572	616
R′1	43	87	131	175	219	263	307	351	395	439	483	527	571	615	659
R′2	86	130	174	218	262	306	350	394	438	482	526	570	614	658	702
R′3	129	173	217	261	305	349	393	437	481	525	569	613	657	701	745
R′4	172	216	260	304	348	392	436	480	524	568	612	656	700	744	788
R′5	215	259	303	347	391	435	479	523	567	611	655	699	743	787	831
R′6	258	302	346	390	434	478	522	566	610	654	698	742	786	830	874
R′7	301	345	389	433	477	521	565	609	653	697	741	784	829	873	917
R′8	344	388	432	476	520	564	608	652	696	740	784	828	872	916	960
R′9	387	431	475	519	563	607	651	695	739	783	827	871	915	959	1003
R′10	430	474	518	562	606	650	694	738	782	826	870	914	958	1002	1046
R′11	473	517	561	605	649	693	737	781	825	869	913	957	1001	1045	1089
R′12	516	560	604	648	692	736	780	824	868	912	956	1000	1044	1088	14
R′13	559	603	647	691	735	779	823	867	911	955	999	1043	1087	13	57
R′14	602	646	690	734	778	822	866	910	954	998	1042	1086	12	56	100
R′15	645	689	733	777	821	865	909	953	997	1041	1085	11	55	99	143
R′16	688	732	776	820	864	908	952	996	1040	1084	10	54	98	142	186
R′17	731	774	819	863	907	951	995	1039	1083	9	53	97	141	185	229
R′18	774	818	862	906	950	994	1038	1082	8	52	96	140	184	228	272
R′19	817	861	905	949	993	1037	1081	7	51	95	139	183	227	271	315
R′20	860	904	948	992	1036	1080	6	50	94	138	182	226	270	314	358
R′21	903	947	991	1035	1079	5	49	93	137	181	225	269	313	357	401
R′22	946	990	1034	1078	4	48	92	136	180	224	268	312	356	400	444
R′23	989	1033	1077	3	47	91	135	179	223	267	311	355	399	443	487
R′24	1032	1076	2	46	90	134	178	222	266	310	354	398	442	486	530
R′25	1075	1	45	89	133	177	221	265	309	353	397	441	485	529	573
	C′15	C′16	C′17	C′18	C′19	C′20	C′21	C′22	C′23	C′24	C′25	C′26	C′27	C′28	C′29
R′0	660	704	748	792	836	880	924	968	1012	1056	1100	26	70	114	158
R′1	703	747	791	835	879	923	967	1011	1055	1099	25	69	113	157	201
R′2	746	790	834	878	922	966	1010	1054	1098	24	68	112	156	200	244
R′3	789	833	877	921	965	1009	1053	1097	23	67	111	155	199	243	287
R′4	832	876	920	964	1008	1052	1096	22	66	110	154	198	242	286	330
R′5	875	919	963	1007	1051	1095	21	65	109	153	197	241	285	329	373
R′6	918	962	1006	1050	1094	20	64	108	152	196	240	284	328	372	416
R′7	961	1005	1049	1093	19	63	107	151	195	239	283	327	371	415	459
R′8	1004	1048	1092	18	62	106	150	194	238	282	326	370	414	458	502
R′9	1047	1091	17	61	105	149	193	237	281	325	369	413	457	501	545
R′10	1090	16	60	104	148	192	236	280	324	368	412	456	500	544	588
R′11	15	59	103	147	191	235	279	323	367	411	455	499	543	587	631
R′12	58	102	146	190	234	278	322	366	410	454	498	542	586	630	674
R′13	101	145	189	233	277	321	365	409	453	497	541	585	629	673	717
R′14	144	188	232	276	320	364	408	452	496	540	584	628	672	716	760
R′15	187	231	275	319	363	407	451	495	539	583	627	671	715	759	803
R′16	230	274	318	362	406	450	494	538	582	626	670	714	758	802	846
R′17	273	317	361	405	449	493	537	581	625	669	713	757	801	845	889
R′18	316	360	404	448	492	536	580	624	668	712	756	800	844	888	932
R′19	359	403	447	491	535	579	623	667	711	755	799	843	887	931	975
R′20	402	446	490	534	578	622	666	710	754	798	842	886	930	974	1018
R′21	445	489	533	577	621	665	709	753	797	841	885	929	973	1017	1061
R′22	488	532	576	620	664	708	752	796	840	884	928	972	1016	1060	1104
R′23	531	575	619	663	707	751	795	839	883	927	971	1015	1059	1103	29
R′24	574	618	662	706	750	794	868	882	926	970	1014	1058	1102	28	72
R′25	617	661	705	749	793	837	881	925	969	1013	1057	1101	27	71	115
	C′30	C′31	C′32	C′33	C′34	C′35	C′36	C′37	C′38	C′39	C′40	C′41	C′42	C′43	C′44
R′0	202	246	290	334	378	422	466	510	554	598	642	686	730	1118	1144
R′1	245	289	333	377	421	465	509	553	597	641	685	729	773	1119	1145
R′2	288	332	376	420	464	508	552	596	640	684	728	772	816	1120	1146
R′3	331	375	419	463	507	551	595	639	683	727	771	815	859	1121	1147
R′4	374	418	462	506	550	594	638	682	726	770	814	858	902	1122	1148
R′5	417	461	505	549	593	637	681	725	769	813	857	901	945	1123	1149
R′6	460	504	548	592	636	680	724	768	812	856	900	944	988	1124	1150
R′7	503	547	591	635	679	723	767	811	855	899	943	987	1031	1125	1151
R′8	546	590	634	678	722	766	810	854	898	942	986	1030	1074	1126	1152
R′9	589	633	677	721	765	809	853	897	941	985	1029	1073	1117	1127	1153
R′10	632	676	720	764	808	852	896	940	984	1028	1072	1116	42	1128	1154
R′11	675	719	763	807	851	895	939	983	1027	1071	1115	41	85	1129	1155
R′12	718	762	806	850	894	938	982	1026	1070	1114	40	84	128	1130	1156
R′13	761	805	849	893	937	981	1025	1069	1113	39	83	127	171	1131	1157
R′14	804	848	892	936	980	1024	1068	1112	38	82	126	170	214	1132	1158
R′15	847	891	935	979	1023	1067	1111	37	81	125	169	213	257	1133	1159
R′16	890	934	978	1022	1066	1110	36	80	124	168	212	256	300	1134	1160
R′17	933	977	1021	1065	1109	35	79	123	167	211	255	299	343	1135	1161
R′18	976	1020	1064	1108	34	78	122	166	210	254	298	342	386	1136	1162
R′19	1019	1063	1107	33	77	121	165	209	253	297	341	385	429	1137	1163
R′20	1062	1106	32	76	120	164	208	252	296	340	384	428	472	1138	1164
R′21	1105	31	75	119	163	207	251	295	339	383	427	471	515	1139	1165
R′22	30	74	118	162	206	250	294	338	382	426	470	514	558	1140	1166
R′23	73	117	161	205	249	293	337	381	425	469	513	557	601	1141	1167
R′24	116	160	204	248	292	336	380	424	468	512	556	600	644	1142	1168
R′25	159	203	247	291	335	379	423	467	511	555	599	643	687	1143	1169

Claims

1. A method for encoding data ready-for-recording on a compact disk, wherein said ready-for-recording data comprises a plurality of data sectors and each of said data sector sectors having a header and a user data, said method comprising:

encoding first sector of said plurality of data sectors;

modifying said header of a second data sector of said plurality of data sectors, said second data sector being succeeding to said first data sector;

partially encoding said second data sector by encoding an affected portion of said second data sector according to said modified header when said second sector having said user data identical to that of said first sector, wherein a portion of said second data sector that is not affected by said modified header is not varied when said affected portion is encoded; and

encoding said second sector by using entire data of said second sector when said second sector has user data non-identical to that of said first sector.

2. The encoding method as claimed in claim 1 wherein said affected portion is varied with said modified header.

3. The encoding method as claimed in claim 2 wherein an encoding form for recording said optical disk is the mode 1 standard.

4. The encoding method as claimed in claim 1 wherein said modified header modified according to a relationship between said first sector and said second sector.

5. The encoding method as claimed in claim 4 wherein said affected portion comprises a row including information being modified by said modified header and a column including information being modified by said modified header.

6. The encoding method as claimed in claim 4 wherein said affected portion comprises an error detection code being modified according to said modified header.

7. The encoding method as claimed in claim 4 wherein said affected portion comprises an error correction code being modified according to said modified header.

8. The encoding method as claimed in claim 1 wherein said ready-for-recording data indicates a gap region when all of said user data in said plurality of data sectors are identical.

9. The encoding method as claimed in claim 1 wherein portion of said second data sector that is not affected by said modified header remains the same in a memory buffer of an optical recording system when encoding said second data sector.

10. A method of encoding a plurality of data sectors having identical user data before an optical recording system records said sector onto a compact disk comprising:

encoding a first sector of said plurality of data sectors, wherein each one of said plurality of data sectors having a header;

modifying said header of a second data sector of said plurality of data sectors, said second data sector being succeeding to said first data sector; and

partially encoding said second data sector by encoding an affected portion of said second data sector according to said modified header, wherein a portion of said second data sector that is not affected by said modified header is not varied when said affected portion is encoded.

11. The encoding method as claimed in claim 10 wherein said affected portion is varied with said modified header.

12. The encoding method as claimed in claim 10 wherein an encoding form for recording said optical disk is the mode 1 standard.

13. The encoding method as claimed in claim 12 wherein said affected portion comprises a row including information being modified by said modified header and a column including information being modified by said modified header.

14. The encoding method as claimed in claim 12 wherein said affected portion comprises an error detection code being modified according to said modified header.

15. The encoding method as claimed in claim 14 wherein said affected portion comprises an error correction code being modified according to said modified header.

16. The encoding method as claimed in claim 15 wherein said currently encoded sector follows a standard adapted to encode application software.

17. The encoding method as claimed in claim 10 wherein said ready-for-recording data indicates a gap region when all of said user data in said plurality of data sectors are identical.

18. The encoding method as claimed in claim 10 wherein said portion of said second data sector that is not affected by said modified header remains the same in a memory buffer of an optical recording system when encoding said second data sector.

19. A method for encoding a gap region ready-for-recording onto a compact disk, wherein said gap region comprises a plurality of data sectors and each of said data sectors having a repeated user data identical to said other data sectors and a header that is non-identical to said other data sectors, said method comprising:

encoding a first sector of said plurality of data sectors according to said repeated user data and said non-repeated portion;

modifying said header of a second data sector of said plurality of data sector according to a relationship between said first sector and said second data sector, said second data sector being succeeding to said first data sector;

encoding an affected portion of said second data sector according to said modified header, wherein said affected portion is varied with said modified header; and

encoding said second data sector according to an encoding form said compact disk being employed.

20. The encoding method as claimed in claim 19 wherein said step of encoding said affected portion of said second data sector comprises a step of encoding an error detection code of said second data sector according to a synchronous code of said second data sector, said modified header, and said identical user data when said encoding form is the mode 1 standard.

21. The encoding method as claimed in claim 19 wherein a non-affected portion of said encoded result of said first sector remains the same when encoding said gap region.

22. The encoding method as claimed in claim 19 wherein said step of encoding said affected portion of said second data sector skipped when said encoding form is the mode 2 standard.

23. A method for encoding data ready-for-recording on a compact disk, wherein the ready-for-recording data comprises multiple data sectors and the individual data sectors have a header and a user data, the method comprising:

modifying the header of a second data sector of the multiple data sectors, the second data sector following a first data sector; and

at least partially encoding the second data sector by encoding an affected portion of the second data sector according to the modified header if the second sector has identical user data to that of the first data sector, wherein a portion of the second data sector that is not affected by the modified header is not varied if the affected portion is encoded.

24. The method of claim 23 further comprising encoding the first data sector before the modifying.

25. The method of claim 23 further comprising encoding the second data sector by using substantially all data of the second data sector if the second data sector has user data that is not identical to that of the first data sector.

26. The method of claim 23 further comprising:

encoding the first data sector before the modifying; and

encoding the second data sector by using substantially all data of the second data sector if the second data sector has user data that is not identical to that of the first data sector.

27. A computer-readable storage device storing computer-executable instructions that, when executed, perform a method for encoding data ready-for-recording on a compact disk, wherein the ready-for-recording data comprises multiple data sectors and individual data sectors have a header and a user data, the method comprising:

modifying the header of a second data sector of the multiple data sectors, the second data sector following a first data sector; and

at least partially encoding the second data sector by encoding an affected portion of the second data sector according to the modified header if the second sector has identical user data to that of the first data sector, wherein a portion of the second data sector that is not affected by the modified header is not varied if the affected portion is encoded.

28. The computer-readable storage device of claim 27 wherein the method further comprises:

encoding the first data sector before the modifying; and

encoding the second data sector by using substantially all data of the second data sector if the second data sector has user data that is not identical to that of the first data sector.

29. A system for encoding data ready-for-recording on a compact disk, wherein the ready-for-recording data comprises multiple data sectors and individual data sectors have a header and a user data, comprising:

a component configured to modify the header of a second data sector of the multiple data sectors, the second data sector following a first data sector; and

a component configured to encode the second data sector by encoding an affected portion of the second data sector according to the modified header if the second sector has identical user data to that of the first data sector, wherein a portion of the second data sector that is not affected by the modified header is not varied if the affected portion is encoded.

30. A system for encoding data ready-for-recording on a compact disk, wherein the ready-for-recording data comprises multiple data sectors and individual data sectors have a header and a user data, comprising:

means for modifying the header of a second data sector of the multiple data sectors, the second data sector following a first data sector; and

means for at least partially encoding the second data sector by encoding an affected portion of the second data sector according to the modified header if the second sector has identical user data to that of the first data sector, wherein a portion of the second data sector that is not affected by the modified header is not varied if the affected portion is encoded.

31. The system of claim 30 further comprising:

means for encoding the first data sector before the modifying; and

means for encoding the second data sector by using substantially all data of the second data sector if the second data sector has user data that is not identical to that of the first data sector.