# US 8,149,681 B2 · Combination type optical disk medium, its reproduction method and optical disk apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,149,681 B2 - Document ID: US8149681B2 - Status: Granted - Kind: B2 - Application number: 12/795,087 - Filed: 2010-06-07 - Published: 2010-09-30 - Granted: 2012-04-03 - Earliest claimed: 2007-03-27 - Assignees: Hitachi, Ltd. - Inventors: Hiroshi Hirayama - Web page: https://patentgrep.com/patent/US8149681B2 ## CPC - G11B 27/329: {on a disc [VTOC]} - G11B 7/24038: Multiple laminated recording layers - G11B 27/105: {of operating discs} - G11B 7/00736: {Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information (sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082)} - G11B 2007/0013: {for carriers having multiple discrete layers} - G11B 2220/237: having exactly two recording layers - G11B 2220/2541: Blu-ray discs; Blue laser DVR discs - G11B 2220/2562: DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs - G11B 2220/2579: HD-DVDs [high definition DVDs]; AODs [advanced optical discs] - G11B 2220/2583: wherein two standards are used on a single disc, e.g. one DVD section and one CD section - G11B 2220/40: Combinations of multiple record carriers - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract A combination type optical disk medium and recording or reproducing method in which the medium include first and second recording layers based on different recoding densities. First and second volume spaces are formed to the first and second recording layers, respectively. Each volume space includes identification information of a head or end of the volume space, and an area for data. One of the volume spaces is recorded with identification information of the other volume space. ## Claims ### Claim 1 A combination type optical disk medium having plural recording layers comprising: a first volume space which is formed for at least two recording layers of the plural recording layers; and a second volume space which is formed for at least one recording layer of the plural recording layers; wherein the at least two recording layers of the first volume space have a recording density different from a recording density of the at least one recording layer of the second volume space; wherein the first volume space includes a first identification information of a head or end of the first volume space, a second identification information of the head or end of the second volume space and an area for data; wherein the second volume space includes the first identification information of the head or end of the first volume space, the second identification information of the head or end of the second volume space and an area for data; and wherein both the first identification information and the second identification information are recorded in the first volume space and the second volume space, respectively. ### Claim 2 (depends on 1) A recording method for a combination type optical disk medium according to claim 1, comprising the step of: recording user data according to the identification information of the head or end of the respective volume space. ### Claim 3 A reproducing method for a combination type optical disk medium having plural recording layers, a first volume space which is formed for at least two recording layers of the plural recording layers, and a second volume space which is formed for at least one recording layer of the plural recording layers, wherein the at least two recording layers of the first volume space have a recording density different from a recording density of the at least one recording layer of the second volume space, wherein the first volume space includes a first identification information of a head or end of the first volume space, a second identification information of a head or end of the second volume space and an area for data, wherein the second volume space includes the first identification information of the head or end of the first volume space, the second identification information of the head or end of the second volume space and an area for data, and wherein both the first identification information and the second identification information are recorded in the first volume space and the second volume space, respectively; wherein the reproducing method comprises the step of: reproducing user data according to the identification information of the head or end of the respective volume space. ### Claim 4 A combination type optical disk medium having plural recording layers comprising: a first volume space which is formed for at least two recording layers of the plural recording layers; and a second volume space which is formed for at least one recording layer of the plural recording layers; wherein the at least two recording layers of the first volume space have a type of recording layer different from a type of recording layer of the at least one recording layer of the second volume space; wherein the first volume space includes a first identification information of a head or end of the first volume space, a second identification information of a head or end of the second volume space and an area for data; wherein the second volume space includes the first identification information of the head or end of the first volume space, the second identification information of the head or end of the second volume space and an area for data; and wherein both the first identification information and the second identification information are recorded in the first volume space and the second volume space, respectively. ### Claim 5 A recording method for a combination type optical disk medium having plural recording layers, a first volume space which is formed for at least two recording layers of the plural recording layers, and a second volume space which is formed for at least one recording layer of the plural recording layers, wherein the at least two recording layers of the first volume space have a type of recording layer different from a type of recording layer of the at least one recording layer of the second volume space, wherein the first volume space includes a first identification information of a head or end of the first volume space, a second identification information of a head or end of the second volume space and an area for data, wherein the second volume space includes the first identification information of the head or end of the first volume space, the second identification information of the head or end of the second volume space and an area for data, and both the first identification information and the second identification information are recorded in the first volume space and the second volume space, respectively; wherein the recording method comprises the step of: recording user data according to the identification information of the head or end of the respective volume space. ### Claim 6 A reproducing method for combination type optical disk medium having plural recording layers, a first volume space which is formed for at least two recording layers of the plural recording layers, and a second volume space which is formed for at least one recording layer of the plural recording layers, wherein the at least two recording layers of the first volume space have a type of recording layer different from a type of recording layer the at least one recording layer of the second volume space, wherein the first volume space includes a first identification information of a head or end of the first volume space, a second identification information of a head or end of the second volume space and an area for data, wherein the second volume space includes the first includes the first identification information of the head or end of the first volume space, the second identification information of the head or end of the second volume space and an area for data, and wherein both the first identification information and the second identification information are recorded in the first volume space and the second volume space, respectively; wherein the reproducing method comprises the step of: reproducing user data according to the identification information of the head or end of the respective volume space. ### Claim 7 A combination type optical disk medium having plural recording layers comprising: a first volume space which is formed for at least two recording layers of the plural recording layers, and a second volume space which is formed for at least one recording layer of the plural recording layers; wherein the at least two recording layers of the first volume space have a type of recording layer different from a type of recording layer of the at least one recording layer of the second volume space; wherein a relation between one of the at least two recording layers of the first volume space and the at least one recording layer of the second volume space is a parallel track path; wherein a relation between the at least two recording layers in the first volume space is an opposite track path; wherein the first volume space includes a first identification information of a head or end of the first volume space a second identification information of the head or end of the second volume space and an area for data; wherein the second volume space includes the first identification information of the head or end of the first volume space, the second identification information of the head or end of the second volume space and an area for data; and wherein both the first identification information and the second identification information are recorded in the first volume space and the second volume space, respectively. ### Claim 8 A recording method for a combination type optical disk medium having plural recording layers, a first volume space which is formed for at least two recording layers of the plural recording layers, and a second volume space which is formed for at least one recording layer of the plural recording layers, wherein the at least two recording layers of the first volume space have a type recording layer different from a type of recording layer of the at least one recording layer of the second volume space, wherein a relation between one of the at least two recording layers of the first volume space and the at least one recording layer of the second volume space is a parallel track path, and wherein a relation between the at least two recording layers in the first volume space is an opposite track path, wherein the first volume space includes a first identification information of a head or end of the first volume space, a second identification information of the head or end of the second volume space and an area for data, wherein the second volume space includes the first identification information of the head or end of the first volume space, the second identification information of the head or end of the second volume space and an area for data; and wherein both the first identification information and the second identification information are recorded in the first volume space and the second volume space, respectively; wherein the recording method comprises the step of: recording user data according to the track path. ### Claim 9 A reproducing method for a combination type optical disk medium having plural recording layers, a first volume space which is formed for at least two recording layers of the plural recording layers, and a second volume space which is formed for at least one recording layer of the plural recording layers, wherein the at least two recording layers of the first volume space have a type of recording layer different from a type of recording layer of the at least one recording layer of the second volume space, wherein a relation between one of the at least two recording layers of the first volume space and the at least one recording layer of the second volume space is a parallel track path, and wherein a relation between the at least two recording layers in the first volume space is an opposite track path, wherein the first volume space includes a first identification information of a head or end of the first volume space, a second identification information of the head or end of the second volume space and an area for data wherein the second volume space includes the first identification information of the head or end of the first volume space, the second identification information of the head or end of the second volume space and an area for data; and wherein both the first identification information and the second identification information are recorded in the first volume space and the second volume space, respectively; wherein the reproducing method comprises the step of: reproducing user data according to the track path.