Misplaced Pages

#339660

62-670: The Voyager Company was a pioneer in CD-ROM production in the 1980s and early 1990s. It was founded in 1984 by four partners: Jon Turell, Bill Becker, Aleen Stein, and Robert Stein in Santa Monica, California , and later moved to New York City. The firm took its name from the Voyager space craft. In partnership with Janus Films , the company published The Criterion Collection , a pioneering home video collection of classic and important contemporary films on LaserDisc . Voyager introduced

124-452: A 12×/10×/32× CD drive can write to CD-R discs at 12× speed (1.76 MB/s), write to CD-RW discs at 10× speed (1.46 MB/s), and read from CDs at 32× speed (4.69 MB/s), if the CPU and media player software permit speeds that high. Software distributors, and in particular distributors of computer games, often make use of various copy protection schemes to prevent software running from any media besides

186-416: A CD-ROM, each track can have its sectors in a different mode from the rest of the tracks. They can also coexist with audio CD tracks, which is the case of mixed mode CDs . Both Mode 1 and 2 sectors use the first 16 bytes for header information, but differ in the remaining 2,336 bytes due to the use of error correction bytes. Unlike an audio CD, a CD-ROM cannot rely on error concealment by interpolation ;

248-414: A block). Disc image formats that store raw CD-ROM sectors include CCD/IMG , CUE/BIN , and MDS/MDF . The size of a disc image created from the data in the sectors will depend on the type of sectors it is using. For example, if a CD-ROM mode 1 image is created by extracting only each sector's data, its size will be a multiple of 2,048; this is usually the case for ISO disc images . On a 74-minute CD-R, it

310-511: A degree with personal computers , using similar component and system design, including standardization with main computer chip architecture. Consoles remain as fixed systems, lacking the customization options that personal computer components have, and most consoles include customized components to maximize space and reduce power consumption to provide the best performance for game playing, while lowering costs with reduced storage and memory configurations. Home video game consoles typically can play

372-466: A higher reliability of the retrieved data is required. To achieve improved error correction and detection, Mode 1, used mostly for digital data, adds a 32-bit cyclic redundancy check (CRC) code for error detection, and a third layer of Reed–Solomon error correction using a Reed-Solomon Product-like Code (RSPC). Mode 1 therefore contains 288 bytes per sector for error detection and correction, leaving 2,048 bytes per sector available for data. Mode 2, which

434-429: A multitude of games, offered either as game cartridges (or ROM cartridges), on optical media like CD-ROM or DVD, or obtained by digital distribution . Early consoles, also considered dedicated consoles, had games that were fixed in the electronic circuitry of the hardware. Some facets may be controlled by switching external controls on the console but the games could not be changed themselves. Most home consoles require

496-483: A proprietary interface, such as the Panasonic CD interface , LMSI/Philips, Sony and Mitsumi standards. Virtually all modern CD-ROM drives can also play audio CDs (as well as Video CDs and other data standards) when used with the right software. CD-ROM drives employ a near- infrared 780 nm laser diode . The laser beam is directed onto the disc via an opto-electronic tracking module, which then detects whether

558-501: A separate game controller, and may support multiple controllers for multiplayer games. Some console games can only be played with special, unconventional game controllers, such as light guns for rail shooters and guitar controllers for music games . Some consoles also possess the ability to connect and interface with a particular handheld game system, which certain games can leverage to provide alternate control schemes, second screen gameplay elements, exclusive unlockable content or

620-522: A series of home video game consoles begins in a generation and lasts to another generation, it is listed in the generation the series began. This list does not claim to be complete. This list does not include other types of video game consoles such as handheld game consoles , which are usually of lower computational power than home consoles due to their smaller size; microconsoles , which are usually low-cost Android-based devices that rely on downloading; retro style consoles ; or dedicated consoles past

682-510: A television screen or computer monitor, and to an external power source, to play video games on using one or more video game controllers . This differs from a handheld game console which will have a built-in screen, controller buttons/features, and a power supply like a battery or battery pack. Earlier home consoles were typically built from a selection of standard and highly customized integrated computer chips, packaged onto circuit boards and cases. Over time, home console design has converged to

SECTION 10

#1732776561340

744-489: A very similar manner (only differing from audio CDs in the standards used to store the data). Discs are made from a 1.2 mm thick disc of polycarbonate plastic , with a thin layer of aluminium to make a reflective surface. The most common size of CD-ROM is 120 mm in diameter, though the smaller Mini CD standard with an 80 mm diameter, as well as shaped compact discs in numerous non-standard sizes and molds (e.g., business card-sized media ), also exist. Data

806-468: Is a maximum. 20× was thought to be the maximum speed due to mechanical constraints until Samsung Electronics introduced the SCR-3230, a 32× CD-ROM drive which uses a ball bearing system to balance the spinning disc in the drive to reduce vibration and noise. As of 2004, the fastest transfer rate commonly available is about 52× or 10,400 rpm and 7.62 MB/s. Higher spin speeds are limited by the strength of

868-584: Is defined as "1× speed". Therefore, for Mode 1 CD-ROMs, a 1× CD-ROM drive reads 150/2 = 75 consecutive sectors per second. The playing time of a standard CD is 74 minutes, or 4,440 seconds, contained in 333,000 blocks or sectors . Therefore, the net capacity of a Mode-1 CD-ROM is 650 MB (650 × 2 ). For 80 minute CDs, the capacity is 703 MB. CD-ROM XA is an extension of the Yellow Book standard for CD-ROMs that combines compressed audio, video and computer data, allowing all to be accessed simultaneously. It

930-418: Is more appropriate for image or video data (where perfect reliability may be a little bit less important), contains no additional error detection or correction bytes, having therefore 2,336 available data bytes per sector. Both modes, like audio CDs, still benefit from the lower layers of error correction at the frame level. Before being stored on a disc with the techniques described above, each CD-ROM sector

992-428: Is possible to fit larger disc images using raw mode, up to 333,000 × 2,352 = 783,216,000 bytes (~747 MB). This is the upper limit for raw images created on a 74 min or ≈650 MB Red Book CD. The 14.8% increase is due to the discarding of error correction data. CD-ROM capacities are normally expressed with binary prefixes , subtracting the space used for error correction data. The capacity of a CD-ROM depends on how close

1054-548: Is present in the computer's CD-ROM drive. Manufacturers of CD writers ( CD-R or CD-RW ) are encouraged by the music industry to ensure that every drive they produce has a unique identifier, which will be encoded by the drive on every disc that it records: the RID or Recorder Identification Code. This is a counterpart to the Source Identification Code (SID), an eight character code beginning with " IFPI " that

1116-602: Is scrambled to prevent some problematic patterns from showing up. These scrambled sectors then follow the same encoding process described in the Red Book in order to be finally stored on a CD. The following table shows a comparison of the structure of sectors in CD-DA and CD-ROMs: The net byte rate of a Mode-1 CD-ROM, based on comparison to CD-DA audio standards, is 44,100 Hz × 16 bits/sample × 2 channels × 2,048 / 2,352 / 8 = 150 KB/s (150 × 2 ) . This value, 150 Kbyte/s,

1178-421: Is stored on the disc as a series of microscopic indentations called "pits", with the non-indented spaces between them called "lands". A laser is shone onto the reflective surface of the disc to read the pattern of pits and lands. Because the depth of the pits is approximately one-quarter to one-sixth of the wavelength of the laser light used to read the disc, the reflected beam 's phase is shifted in relation to

1240-402: Is used for data. XA Mode 2 Form 2 has 2,324 bytes of user data, and is similar to the standard Mode 2 but with error detection bytes added (though no error correction). It can interleave with XA Mode 2 Form 1 sectors, and it is used for audio/video data. Video CDs , Super Video CDs , Photo CDs , Enhanced Music CDs and CD-i use these sector modes. The following table shows a comparison of

1302-430: Is usually stamped on discs produced by CD recording plants. Home video game consoles A home video game console is a video game console that is designed to be connected to a display device, such as a television , and an external power source as to play video games . While initial consoles were dedicated units with only a few games fixed into the electronic circuits of the system, most consoles since support

SECTION 20

#1732776561340

1364-727: The ISO 9660 standard in 1988. One of the first products to be made available to the public on CD-ROM was the Grolier Academic Encyclopedia , presented at the Microsoft CD-ROM Conference in March 1986. CD-ROMs began being used in home video game consoles starting with the PC Engine CD-ROM (TurboGrafx-CD) in 1988, while CD-ROM drives had also become available for home computers by

1426-432: The 1990s were called " multimedia " computers because they incorporated a CD-ROM drive, which allowed for the delivery of several hundred megabytes of video, picture, and audio data. The first laptop to have an integrated CD-ROM drive as an option was 1993's CF-V21P by Panasonic ; however, the drive only supported mini CDs up to 3.5 inches in diameter. The first notebook to support standard 4.7-inch-diameter discs

1488-948: The Holzbrinck Group withdrew with its 20%, the name "Voyager", and half of the CD-ROM rights. Robert Stein took the other half of the CD-ROM rights and the Toolkit rights. This left the Criterion Collection in the possession of three of the original partners, each with a third: Aleen Stein, the Becker family, and the Turell family. CD-ROM During the 1990s and early 2000s, CD-ROMs were popularly used to distribute software and data for computers and fifth generation video game consoles . DVDs as well as downloading started to replace CD-ROMs in these roles starting in

1550-465: The ability to transfer certain game data. The first commercial video game console was the Magnavox Odyssey , developed by a team led by Ralph H. Baer and released commercially in 1972. It was shortly followed by the release of the home version of Pong by Atari Inc. in 1975 based on the arcade game. A number of clones of both systems rushed to fill the nascent home console market and

1612-406: The beam has been reflected or scattered. CD-ROM drives are rated with a speed factor relative to music CDs. If a CD-ROM is read at the same rotational speed as an audio CD , the data transfer rate is 150 Kbyte/s, commonly called "1×" (with constant linear velocity, short "CLV" ). At this data rate, the track moves along under the laser spot at about 1.2 m/s. To maintain this linear velocity as

1674-576: The best-selling console to date with over 155 million units sold. Microsoft, fearing that the PlayStation 2 was threatening the competitive edge of the personal computer, entered the console space with its Xbox line in 2001. Internet connectivity had become commonplace by the mid-2000s, and nearly all home consoles supported digital distribution and online service offerings by the 2010s. With Sony and Microsoft's dominance in hardware capabilities, most other major manufacturers have since dropped out of

1736-622: The company and founded Activision , becoming the first third-party developer. Activision's success led to a rush of new developers creating games without any publishing controls for these systems. The market became flooded with games, and combined with the rising popularity of the personal computer and the economic recession of the early 1980s, led to the video game crash of 1983 in the U.S. market. Nintendo , which had released its Family Computer console in Japan that year, took several cautionary steps to limit game production to only licensed games, and

1798-521: The company he founded, Gauss Electrophysics. The LaserDisc was the immediate precursor to the CD, with the primary difference being that the LaserDisc encoded information through an analog process whereas the CD used digital encoding. Key work to digitize the optical disc was performed by Toshi Doi and Kees Schouhamer Immink during 1979–1980, who worked on a taskforce for Sony and Philips . The result

1860-401: The current leading manufacturers being Sony , Microsoft , and Nintendo , colloquially known as the "Big 3." Past console manufacturers have included Atari , Fairchild , Mattel , Coleco , Sega , NEC , 3DO , Fujitsu and SNK . A home video game console is a predesigned piece of electronic hardware that is meant to be placed at a fixed location at one's home, connected to a display like

1922-423: The data are recorded on them by a laser changing the properties of a dye or phase transition material in a process that is often referred to as " burning ". Data stored on CD-ROMs follows the standard CD data encoding techniques described in the Red Book specification (originally defined for audio CD only). This includes cross-interleaved Reed–Solomon coding (CIRC), eight-to-fourteen modulation (EFM), and

Voyager Company - Misplaced Pages Continue

1984-451: The data stored in these sectors corresponds to any type of digital data, not audio samples encoded according to the audio CD specification. To structure, address and protect this data, the CD-ROM standard further defines two sector modes, Mode 1 and Mode 2, which describe two different layouts for the data inside a sector. A track (a group of sectors) inside a CD-ROM only contains sectors in the same mode, but if multiple tracks are present in

2046-401: The disc at 1600 to 4000 rpm, giving a linear velocity of 9.6 m/s and a transfer rate of 1200 Kbyte/s. Above 12× speed most drives read at Constant angular velocity (CAV, constant rpm) so that the motor is not made to change from one speed to another as the head seeks from place to place on the disc. In CAV mode the "×" number denotes the transfer rate at the outer edge of the disc, where it

2108-511: The dominant console type of the era, though not all consoles of those eras are of the same type. Some eras are referred to based on how many bits a major console could process. The "128-bit era" ( sixth generation ) was the final era in which this practice was widespread. This list only counts the first iteration of each console's hardware, because several systems have had slim, enhanced or other hardware revisions, but they are not individually listed here. The list also includes unreleased systems. If

2170-565: The early 2000s, and the use of CD-ROMs for commercial software is now uncommon. The earliest theoretical work on optical disc storage was done by independent researchers in the United States including David Paul Gregg (1958) and James Russel (1965–1975). In particular, Gregg's patents were used as the basis of the LaserDisc specification that was co-developed between MCA and Philips after MCA purchased Gregg's patents, as well as

2232-401: The end of the 1980s. In 1990, Data East demonstrated an arcade system board that supported CD-ROMs, similar to 1980s LaserDisc video games but with digital data, allowing more flexibility than older LaserDisc games. By early 1990, about 300,000 CD-ROM drives were sold in Japan, while 125,000 CD-ROM discs were being produced monthly in the United States. Some computers that were marketed in

2294-525: The first Japanese COMDEX computer show in 1985. In November 1985, several computer industry participants, including Microsoft , Philips , Sony , Apple and Digital Equipment Corporation, met to create a specification to define a file system format for CD-ROMs. The resulting specification, called the High Sierra format, was published in May 1986. It was eventually standardized, with a few changes, as

2356-399: The first generation, which have games built in and do not use any form of physical media. Consoles have been redesigned from time to time to improve their market appeal. Redesigned models are not listed on their own. The list omits the more than 900 home video game consoles known to have been released in the first generation of video game consoles , those that were generally game consoles for

2418-552: The hardware business, but maintain a presence in the game development and licensing space. Nintendo remains the only competitor having taken a blue ocean strategy by offering more original console concepts such as motion sensing in the Wii and the hybrid design of the Nintendo Switch . Within the home video game console market, the leading consoles have often been grouped into generations, consoles that were major competitors in

2480-549: The incoming beam, causing destructive interference and reducing the reflected beam's intensity. This is converted into binary data. Several formats are used for data stored on compact discs, known as the Rainbow Books . The Yellow Book , created in 1983, defines the specifications for CD-ROMs, standardized in 1988 as the ISO / IEC 10149 standard and in 1989 as the ECMA -130 standard. The CD-ROM standard builds on top of

2542-673: The late 1990s. Over 10 years later, commonly available drives vary between 24× (slimline and portable units, 10× spin speed) and 52× (typically CD- and read-only units, 21× spin speed), all using CAV to achieve their claimed "max" speeds, with 32× through 48× most common. Even so, these speeds can cause poor reading (drive error correction having become very sophisticated in response) and even shattering of poorly made or physically damaged media, with small cracks rapidly growing into catastrophic breakages when centripetally stressed at 10,000–13,000 rpm (i.e. 40–52× CAV). High rotational speeds also produce undesirable noise from disc vibration, rushing air and

Voyager Company - Misplaced Pages Continue

2604-460: The marketplace. There have been nine generations of consoles since the 1970s, with a new generation appearing about every five years. There are more than 1000 home video game consoles known to exist, the vast majority of which were released during the first generation: only 103 home video game consoles were released between the second and current generation, 15 were canceled. This list is divided into console generations which are named based on

2666-468: The notion of " bits " as a major selling point for consumers. The consumer adoption of optical discs with larger storage capacity in the mid-1995 led many console manufactures to move away from cartridges to CD-ROMs and later to DVDs and other formats, with Sony's PlayStation line introducing even more features that gave it an advantage in the market; the PlayStation 2 , released in 2000, remains

2728-412: The optical head moves to different positions, the angular velocity is varied from about 500 rpm at the inner edge to 200 rpm at the outer edge. The 1× speed rating for CD-ROM (150 Kbyte/s) is different from the 1× speed rating for DVDs (1.32 MB/s). When the speed at which the disc is spun is increased, data can be transferred at greater rates. For example, a CD-ROM drive that can read at 8× speed spins

2790-479: The original Red Book CD-DA standard for CD audio. Other standards, such as the White Book for Video CDs , further define formats based on the CD-ROM specifications. The Yellow Book itself is not freely available, but the standards with the corresponding content can be downloaded for free from ISO or ECMA. There are several standards that define how to structure data files on a CD-ROM. ISO 9660 defines

2852-432: The original CD-ROMs. This differs somewhat from audio CD protection in that it is usually implemented in both the media and the software itself. The CD-ROM itself may contain "weak" sectors to make copying the disc more difficult, and additional data that may be difficult or impossible to copy to a CD-R or disc image, but which the software checks for each time it is run to ensure an original disc and not an unauthorized copy

2914-576: The outer edge of the disc with the same rotational speed as a standard ( constant linear velocity , CLV) 12×, or 32× with a slight increase. However, due to the nature of CAV (linear speed at the inner edge is still only 12×, increasing smoothly in-between) the actual throughput increase is less than 30/12; in fact, roughly 20× average for a completely full disc, and even less for a partially filled one. Problems with vibration, owing to limits on achievable symmetry and strength in mass-produced media, mean that CD-ROM drive speeds have not massively increased since

2976-463: The outward data track is extended to the disc's outer rim. A standard 120 mm, 700 MB CD-ROM can actually hold about 703 MB of data with error correction (or 847 MB total). In comparison, a single-layer DVD-ROM can hold 4.7 GB (4.7 × 10 bytes) of error-protected data, more than 6 CD-ROMs. CD-ROM discs are read using CD-ROM drives. A CD-ROM drive may be connected to the computer via an IDE ( ATA ), SCSI , SATA , FireWire , or USB interface or

3038-536: The polycarbonate plastic of which the discs are made. At 52×, the linear velocity of the outermost part of the disc is around 65 m/s. However, improvements can still be obtained using multiple laser pickups as demonstrated by the Kenwood TrueX 72× which uses seven laser beams and a rotation speed of approximately 10×. The first 12× drive was released in late 1996. Above 12× speed, there are problems with vibration and heat. CAV drives give speeds up to 30× at

3100-431: The release of special editions on LaserDisc. In 1986 it decided to make it company policy to only release widescreen films on LaserDisc in their original aspect ratio rather than pan and scan formats that was common for home media releases at the time. Many other labels followed suit. In 1994, the partnership was diluted by selling 20% of it to the von Holzbrinck Publishing Group , a German holding company. In 1997,

3162-575: The spindle motor itself. Most 21st-century drives allow forced low speed modes (by use of small utility programs) for the sake of safety, accurate reading or silence, and will automatically fall back if numerous sequential read errors and retries are encountered. Other methods of improving read speed were trialled such as using multiple optical beams, increasing throughput up to 72× with a 10× spin speed, but along with other technologies like 90~99 minute recordable media, GigaRec and double-density compact disc ( Purple Book standard) recorders, their utility

SECTION 50

#1732776561340

3224-485: The standard file system for a CD-ROM. ISO 13490 is an improvement on this standard which adds support for non-sequential write-once and re-writeable discs such as CD-R and CD-RW , as well as multiple sessions . The ISO 13346 standard was designed to address most of the shortcomings of ISO 9660, and a subset of it evolved into the UDF format, which was adopted for DVDs . A bootable CD specification, called El Torito ,

3286-467: The structure of sectors in CD-ROM XA modes: When a disc image of a CD-ROM is created, this can be done in either "raw" mode (extracting 2,352 bytes per sector, independent of the internal structure), or obtaining only the sector's useful data (2,048/2,336/2,352/2,324 bytes depending on the CD-ROM mode). The file size of a disc image created in raw mode is always a multiple of 2,352 bytes (the size of

3348-407: The use of pits and lands for coding the bits into the physical surface of the CD. The structures used to group data on a CD-ROM are also derived from the Red Book . Like audio CDs (CD-DA), a CD-ROM sector contains 2,352 bytes of user data, composed of 98 frames, each consisting of 33 bytes (24 bytes for the user data, 8 bytes for error correction, and 1 byte for the sub code). Unlike audio CDs,

3410-450: The use of swappable game media, either through game cartridges , optical discs , or through digital distribution to internal storage. There have been numerous home video game consoles since the first commercial unit, the Magnavox Odyssey in 1972. Historically these consoles have been grouped into generations lasting each about six years based on common technical specifications. As of 2024, there have been nine console generations, with

3472-508: The video game industry suffered a small recession in 1977 due to this. The Fairchild Channel F , released in 1976, was the first console to use game cartridges , which was then used by the Atari VCS and several other consoles of the second generation and led to a second boom in the video game industry in the United States and around the globe. During this time, Atari Inc. had been sold to Warner Communications , and several programmers left

3534-466: Was IBM 's ThinkPad 755CD in 1994. On early audio CD players that were released prior to the advent of the CD-ROM, the raw binary data of CD-ROM was played back as noise. To address this problem, the subcode channel Q has a "data" flag in areas of the disc that contain computer data rather than playable audio. The data flag instructs CD players to mute the audio. CD-ROMs are identical in appearance to audio CDs , and data are stored and retrieved in

3596-575: Was able to introduce it, rebranded as the Nintendo Entertainment System (NES) in 1985 into the U.S. market. The NES helped to revive the console market and gave Nintendo dominance during the late 1980s. Sega took advantage of the newfound U.S. growth to market its Sega Genesis against the Super Nintendo Entertainment System in the early 1990s in the so-called "console wars" and emphasized

3658-581: Was intended as a bridge between CD-ROM and CD-i ( Green Book ) and was published by Sony and Philips , and backed by Microsoft , in 1991, first announced in September 1988. "XA" stands for eXtended Architecture. CD-ROM XA defines two new sector layouts, called Mode 2 Form 1 and Mode 2 Form 2 (which are different from the original Mode 2). XA Mode 2 Form 1 is similar to the Mode 1 structure described above, and can interleave with XA Mode 2 Form 2 sectors; it

3720-468: Was issued in January 1995, to make a CD emulate a hard disk or floppy disk . Pre-pressed CD-ROMs are mass-produced by a process of stamping where a glass master disc is created and used to make "stampers", which are in turn used to manufacture multiple copies of the final disc with the pits already present. Recordable ( CD-R ) and rewritable ( CD-RW ) discs are manufactured by a different method, whereby

3782-1085: Was nullified by the introduction of consumer DVD-ROM drives capable of consistent 36× equivalent CD-ROM speeds (4× DVD) or higher. Additionally, with a 700 MB CD-ROM fully readable in under 2.5 minutes at 52× CAV, increases in actual data transfer rate are decreasingly influential on overall effective drive speed when taken into consideration with other factors such as loading/unloading, media recognition, spin up/down and random seek times, making for much decreased returns on development investment. A similar stratification effect has since been seen in DVD development where maximum speed has stabilised at 16× CAV (with exceptional cases between 18× and 22×) and capacity at 4.3 and 8.5 GB (single and dual layer), with higher speed and capacity needs instead being catered to by Blu-ray drives. CD-Recordable drives are often sold with three different speed ratings: one speed for write-once operations, one for re-write operations, and one for read-only operations. The speeds are typically listed in that order; i.e.

SECTION 60

#1732776561340

3844-521: Was the Compact Disc Digital Audio (CD-DA), defined in 1980. The CD-ROM was later designed as an extension of the CD-DA, and adapted this format to hold any form of digital data, with an initial storage capacity of 553 MB . Sony and Philips created the technical standard that defines the format of a CD-ROM in 1983, in what came to be called the Yellow Book . The CD-ROM was announced in 1984 and introduced by Denon and Sony at

#339660