Abstract: A container corresponding to executable code may be received. The container may be executed in a secure computation environment by performing one or more operations specified by the executable code of the container. An instruction to terminate the executing of the container may be received from a high level operating system (HLOS) that is external to the secure computation environment. A determination may be made as to whether the container is associated with a preemption privilege and the executing of the container may be terminated after receiving the instruction from the HLOS based on the determination of whether the container is associated with the preemption privilege.

Abstract: A wireless media player and a related system and methodology are disclosed. One aspect of the wireless media player system pertains to a virtual connector system, apparatus, and method for the automatic establishment of wireless connectivity with other electronic devices. In one embodiment, the media player device employs the use of integrated Radio Frequency Identification (RFID) technology to exchange communication settings, media capability, and other parameters with an external device that also has integrated RFID technology. The automatic exchange of settings and other information via a proximity-based RFID data exchange allows a media player to quickly establish a secure communication link with another device via a commonly supported wireless protocol such as Ultra Wideband (UWB) or Bluetooth. Another aspect of the media player system pertains to a method of using the captured media capability of the connecting device to customize certain menu options and software parameters in the media player.

Abstract: A wireless media player and a related system and methodology are disclosed. One aspect of the wireless media player system pertains to a virtual connector system, apparatus, and method for the automatic establishment of wireless connectivity with other electronic devices. In one embodiment, the media player device employs the use of integrated Radio Frequency Identification (RFID) technology to exchange communication settings, media capability, and other parameters with an external device that also has integrated RFID technology. The automatic exchange of settings and other information via a proximity-based RFID data exchange allows a media player to quickly establish a secure communication link with another device via a commonly supported wireless protocol such as Ultra Wideband (UWB) or Bluetooth. Another aspect of the media player system pertains to a method of using the captured media capability of the connecting device to customize certain menu options and software parameters in the media player.

Abstract: A wireless media player and a related system and methodology are disclosed. One aspect of the wireless media player system pertains to a virtual connector system, apparatus, and method for the automatic establishment of wireless connectivity with other electronic devices. In one embodiment, the media player device employs the use of integrated Radio Frequency Identification (RFID) technology to exchange communication settings, media capability, and other parameters with an external device that also has integrated RFID technology. The automatic exchange of settings and other information via a proximity-based RFID data exchange allows a media player to quickly establish a secure communication link with another device via a commonly supported wireless protocol such as Ultra Wideband (UWB) or Bluetooth. Another aspect of the media player system pertains to a method of using the captured media capability of the connecting device to customize certain menu options and software parameters in the media player.

Abstract: Provided is a system including an optical disc drive and a user terminal, and a method of processing a file. The optical disc drive may be connected to the user terminal. According to various aspects, the user terminal may include a file system for identifying a file format of the file recorded on an optical disc. The user terminal may search for a file recorded in an optical disc via the file system, and play the file through downloading.

Abstract: A wireless media player and a related system and methodology are disclosed. One aspect of the wireless media player system pertains to a virtual connector system, apparatus, and method for the automatic establishment of wireless connectivity with other electronic devices. In one embodiment, the media player device employs the use of integrated Radio Frequency Identification (RFID) technology to exchange communication settings, media capability, and other parameters with an external device that also has integrated RFID technology. The automatic exchange of settings and other information via a proximity-based RFID data exchange allows a media player to quickly establish a secure communication link with another device via a commonly supported wireless protocol such as Ultra Wideband (UWB) or Bluetooth. Another aspect of the media player system pertains to a method of using the captured media capability of the connecting device to customize certain menu options and software parameters in the media player.

Abstract: An image processing apparatus includes a detecting unit configured to detect a change in a viewing environment; a storing unit configured to store position information of data displayed on a display unit when the change in the viewing environment is detected by the detecting unit; and a reproducing unit configured to reproduce data corresponding to the position information stored in the storing unit by receiving a re-viewing instruction.

Abstract: When the temperature of a main CPU detected by a temperature sensor exceeds a set temperature, a sub CPU drives a drive unit of an optical disc under the condition where the operation of the main CPU is suspended to stop the rise in temperature caused by the main CPU. In this case, cooling of the main CPU advances by the wind based on the driving of the optical disc, and as a result, the suspension time of data reading from the optical disc or data writing to the optical disc until the main CPU restarts can be shortened.

Abstract: An optical disc device includes a pickup, a driving mechanism that drives the pickup, and a driving controlling portion that applies an initial driving voltage to the driving mechanism over a specific time interval up until the pickup arrives at an outermost position on an outer peripheral side, the initial driving voltage causing the pickup to arrive at the outermost position. After the specific time interval has elapsed, the driving controlling portion applies, to the driving mechanism, an adjustment driving voltage of a voltage amplitude less than a voltage amplitude of the initial driving voltage or a driving frequency less than a driving frequency of the initial driving voltage.

Abstract: A testing signal generation device for testing performance of a disc drive includes a signal generating unit, a signal converting unit, and a signal transmitting unit. The signal generating unit generates at least one pulse signal for controlling the disc drive to work at predetermined working modes. The signal converting unit converts the at least one pulse signal into at least one test signal. The signal transmitting unit transmits the at least one test signal to the disc drive, to control the disc drive to read data from an optical disc in the disc drive. A testing signal generation method for testing performance of the disc drive is also provided.

Abstract: A testing device for testing performance parameters of a disc player includes a display, and a storage that records a plurality of types of different discs, a plurality of testing commands each corresponding to a type of discs, and a reference value range of each of performance parameters of the disc player. The testing command corresponding to the type of a disc is obtained to be executed by the disc player to obtain a value of each performance parameter of the disc player. The testing device determines whether the disc player is qualified or not according to the obtained value.

Abstract: Provided is a multi-functional optical disc drive that includes an interface that connects a front-end of the optical drive to a back-end, and also connects the front-end of the optical drive to an external device. The optical drive also includes a controller that selectively controls connection to the back-end or the external device.

Abstract: A writing-system comprises a first and a second writing-device, and is connected to an information-processor-apparatus that obtains unwritten-data from the first and the second writing-devices when a notification is received, the notification indicating that the unwritten-data is generated while writing data on a recording-medium used by either of the writing-devices, wherein the first writing-device comprises a first writing-unit, when the unwritten-data is generated while writing data on a recording-medium, transmits to the information-processor-apparatus, dummy information for inhibiting the unwritten-data to be obtained by the information-processor-apparatus, and writes the unwritten-data to a memory-unit, the recording-medium and the memory-unit are included in a cartridge accommodated in the first writing-device, and the second writing-device comprises a second writing-unit that writes, on the recording-medium, the unwritten-data stored in the memory-unit when the cartridge is moved from the first writi

Abstract: A method comprising recording data related to a start-up procedure on at least one of a plurality of recording layers disposed on an optical record carrier for reading back the recorded data during subsequent start-ups, the selection of the at least one recording layer based on properties of the at least one recording layer is disclosed. The technique reduces the optical record carrier start-up time and is useful for DVD, HD-DVD and BD recorders and/or players.

Abstract: Reproduction of digital data using a fallback mechanism is disclosed. The digital data can be reproduced in a first mode and in an at least second mode, the operability of a selected mode is monitored and in a situation of failure, a switching between the mode in which a failure is detected to a mode which is operable can be made, so that least some functionality is ensured. An apparatus is disclosed, the apparatus being operable in a first mode where the digital data is accessed in a first format, and the apparatus being operable in an at least second mode where the digital data is accessed in at least a second format. Also a system, a method, a computer readable code and a data stream are disclosed.

Abstract: A wireless media player and a related system and methodology are disclosed. One aspect of the wireless media player system pertains to a virtual connector system, apparatus, and method for the automatic establishment of wireless connectivity with other electronic devices. In one embodiment, the media player device employs the use of integrated Radio Frequency Identification (RFID) technology to exchange communication settings, media capability, and other parameters with an external device that also has integrated RFID technology. The automatic exchange of settings and other information via a proximity-based RFID data exchange allows a media player to quickly establish a secure communication link with another device via a commonly supported wireless protocol such as Ultra Wideband (UWB) or Bluetooth. Another aspect of the media player system pertains to a method of using the captured media capability of the connecting device to customize certain menu options and software parameters in the media player.

Abstract: A reproduction device, contains a rotatable operation disk part for performing an input related to reading of data stored in a memory and a capacitance sensor section for outputting a sensor value expressing a change of a capacitance according to depression of the rotatable operation disk part. The device also contains a storage part for storing a reference value corresponding to the sensor value obtained while the rotatable operation disk part is not depressed, and a control part for judging presence/absence of pressing on the rotatable operation disk part based on a vector quantity being a relative value obtained from a difference between the sensor value output from the capacitance sensor section and the reference value stored in the storage part.

Abstract: An approach is described that allows an optical disc drive to accurately verify the power level of irradiation beam power levels associated a write strategy used in high speed, high density optical disc media formats using a front monitor diode with a relatively slow rise time and/or relative slow fall time compared to the clock cycle speed of the write strategy signal. A portion of encoded data to be written to an optical disc media may be overwritten to include a predetermined data pattern. During write strategy processing of the data, the predetermined data pattern is replaced with a constant write strategy power level. The constant write strategy output placed within the write strategy signal may control the optical disc drive laser to emit a constant irradiation beam for a duration sufficiently long to allow the front monitor diode to obtain an accurate measure of the irradiation beam power level.

Abstract: An information recording medium includes a lead-in area, a user data area, and a lead-out area, wherein at least one of the lead-in or lead-out areas includes a compatibility information area in which compatibility information, specifying whether each area on the information recording medium is recordable and/or reproducible. The compatibility information may include state information on whether the user data area is recordable and/or reproducible, state information on whether the lead-in/lead-out area is recordable and/or reproducible, state information on whether the compatibility information area is recordable and/or reproducible, or state information on whether a defect management area (DMA) is recordable and/or reproducible. Accordingly, an existing drive or apparatus for recording and/or reproducing data on and/or from an information recording medium can smoothly record and/or reproduce data on an information recording medium that is of a higher version than the existing drive or apparatus.

Abstract: A method, apparatus and computer-readable recording medium are disclosed, for recording information in an information recording medium. The method includes a first step of outputting, in response to an initialization request for initializing the information recording medium, termination information indicative of termination of the initialization before the initialization starts, and a second step of starting the initialization at a predetermined timing after the output of the termination information. In this procedure, it is possible to start to record data in a blank disc sooner than in conventional methods.

Abstract: An information processing apparatus includes a main switch configured to receive on/off-instructions for power supply from a user, a predicting section configured to predict a time period during which a possibility that the main switch receives an on-instruction is high, a connector section capable of connecting an electronic apparatus including a display screen, a communication establishing section configured to execute processing to establish a state allowing communication with an electronic apparatus connected to the connector section, a black-screen output section capable of outputting a black-screen signal to the electronic apparatus via the connector section, and a startup section configured to start, during a time period predicted by the predicting section and when the main switch is off, the communication establishing section and the black-screen output section, and to cause the black-screen output section to continue to output the black-screen signal until the main switch is turned on.

Abstract: When power is supplied to an ODD used by being externally attached to a PC via a USB port, it is desirable not to cause an error to occur owing to occurrence of a power-on reset even when the power supplying ability of the PC is insufficient. After the ODD has been connected with the PC and started, the ODD executes an operation of large current consumption for a predetermined period of time and judges whether a power-on reset occurs or not while the operation is being executed. When the power-on reset does not occur, the ODD is set to operate on the basis of the highest specification. When the power-on reset has occurred, the specification is set lower so as to operate the ODD with reduced current consumption.

Abstract: A disk drive is disclosed comprising a disk including a plurality of tracks, a head coupled to an actuator arm actuated over the disk, and control circuitry operable to first seek the head from a first track to a second track, read data from the second track to generate a first read signal, second seek the head from the second track to a third track, read data from the third track to generate a second read signal, third seek the head from the third track to a fourth track, and read data from the fourth track to generate a third read signal. The first, second, and third read signals are evaluated to qualify the disk drive, wherein the first, second, and third seeks are executed in proximity so as to excite the actuator arm with a jitter motion.

Abstract: A reading apparatus and method for reading data from a digital versatile disc includes a specification section configured to specify a predetermined position of content. A controller generates information indicating a predetermined portion from a position specified by the specification section. A storage section reads the predetermined portion from the digital versatile disc on the basis of the information generated by the generation section and stores the predetermined portion on a storage medium. A reading controller controls reading of data from the storage medium and the digital versatile disc.

Abstract: An optical disk playback device comprises first and second lasers, an optical assembly, first and second optical detectors, and controller circuitry coupled to the optical detectors. The optical assembly is configured to direct incident light from the first and second lasers so as to form respective leading and trailing scanning spots on a surface of an optical disk, and is further configured to direct corresponding reflected light from the leading and trailing scanning spots on the surface of the optical disk to respective ones of the optical detectors. The controller circuitry is configured to identify a surface imperfection of the optical disk by processing the reflected light associated with the leading scanning spot prior to the trailing scanning spot reaching that surface imperfection.

Abstract: A recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, capable of preventing unauthorized duplication of data streams, written thereon, onto another medium, such as a BD-RE or BD-R, which includes physical mark information, and to methods and apparatuses for forming, recording, reproducing, and restricting playback of the recording medium to prevent unauthorized duplication.

Abstract: A method comprising recording data related to a start-up procedure on at least one of a plurality of recording layers disposed on an optical record carrier for reading back the recorded data during subsequent start-ups, the selection of the at least one recording layer based on properties of the at least one recording layer is disclosed. The technique reduces the optical record carrier start-up time and is useful for DVD, HD-DVD and BD recorders and/or players.

Abstract: A model is derived for write parameters of a laser in an optical drive. A parameter range for the write parameters is set based on a recordable medium. A number of test runs are recorded on the recordable medium while varying the write parameters. Write performance characteristics are measured over the test runs, and a model of write performance as a function of the write parameters is derived. Values for write parameters are selected for use in writing actual data based on the derived model. A first section of user data is written to the data-carrying region of the recordable medium using the selected values. The write performance characteristics of the first section of user data are measured, and the model is updated by including the measurements from the data-carrying region. New values for the write parameters of the laser are selected based on the updated model.

Abstract: In a system for reproducing AV information from a recording medium, such as a DVD, not only are usual titles reproduced, but also related information relevant to specific stream information is acquired easily by making use of resources on a computer network. In a reproducing system with the function of reproducing the title information recorded on a DVD and displaying it on the screen of a display section, when the user clicks a Web mark on the screen, the CPU links to a Web server on the Internet via a modem and accesses the Web page related to the stream information on the screen. At that time, the related Web page is the selected information conforming to parental information, or attribute information, set in the system.

Abstract: The present invention achieves higher precision and lower power consumption by reducing semiconductor chip occupation area. A semiconductor integrated circuit which can be mounted on an optical disk device has: a wobble signal generating circuit capable of receiving first, second, third, and fourth light reception output signals A, B, C, and D of a light receiving element in an optical pickup and detecting a wobble in a recordable disk; a differential phase detection signal (DPD) generating circuit for tracking an unrecordable disk; and two A/D converters and an arithmetic circuit.

Abstract: An optical disk apparatus and a method of performing a lead-in process with respect to an optical disk thereof includes a feature where an optical pickup unit reads out information recorded on a file system area of the storage area of the optical disk, and performs a lead-in process using the read-out file system if information recorded on a lead-in area of a storage area of the optical disk cannot be read out. Further, the optical disk apparatus may perform the lead-in process with respect to the optical disk even if there is a defect in the lead-in area.

Abstract: Particular embodiments generally relate to randomly displaying images on a display device. In one embodiment, a list of images for display on a display device, such as a digital picture frame or television, is determined. The display device is configured to display different images in a sequential order (such as one after another). A random display method may be determined. An image in the list of images is then randomly selected based on the random display method. For example, images are randomly selected such that all images in a list of images are displayed once without duplicative display of an image.

Abstract: An optical disc discriminating method and an optical disc discriminating apparatus which can discriminate a type of optical disc with a simple configuration, causes a drive means to vary an incident angle of a laser light beam with respect to an optical disc while irradiating the optical disc with the laser light beam from a light beam generating section, causes a photodetector to detect a diffraction light of the laser light beam from a recording track of the optical disc, detects a value corresponding to the incident angle when the diffraction light is detected, and discriminates the type of the optical disc on the basis of the detected value.

Abstract: The invention relates to a method of writing data to a disc (OD). The method comprised: a) performing a plurality of writing actions in which a plurality of data portions are written to the disc, b) performing a plurality of verification actions in which written data portions are at least partly verified and at least part of the data portions are replaced if needed. The method further comprises a2) performing a decision action for each writing action in which a decision whether or not to perform the verification action for a specific written data portion is taken.

Abstract: An information recording medium includes a lead-in area, a user data area, and a lead-out area, wherein at least one of the lead-in or lead-out areas includes a compatibility information area in which compatibility information, specifying whether each area on the information recording medium is recordable and/or reproducible. The compatibility information may include state information on whether the user data area is recordable and/or reproducible, state information on whether the lead-in/lead-out area is recordable and/or reproducible, state information on whether the compatibility information area is recordable and/or reproducible, or state information on whether a defect management area (DMA) is recordable and/or reproducible. Accordingly, an existing drive or apparatus for recording and/or reproducing data on and/or from an information recording medium can smoothly record and/or reproduce data on an information recording medium that is of a higher version than the existing drive or apparatus.

Abstract: Provided are a method for emulating a separate contents memory unit into an optical disk, an optical disk drive using the same, and an optical disk including a security zone. In the method, when an optical disk processing command from a host is present, whether an optical disk is present in the optical disk drive is judged. When the optical disk is not present in the optical disk drive as a result of the judgment, the contents memory unit is executed as a virtual optical disk. An application stored in the contents memory unit is displayed. The optical disk drive includes an optical disk storage unit, a contents memory unit, and a controller. The optical disk storage unit stores or reproduces contents using an optical disk. The contents memory unit stores contents therein and is executed as a virtual optical disk when the optical disk is not present. The controller controls the optical disk storage unit and the contents memory unit, and controls an access to be made, subject to the contents memory unit.

Abstract: A recording apparatus capable of multiplexing video data and audio data and recording the video data and audio data in multiple record units as one file on a recording medium includes a data receiving unit, a recording instruction receiving unit, a packet generating unit, a recording unit, and a control unit. The control unit controls the packet generating unit and the recording unit so as to record data embedded with padding data in a section from the trailing end of valid data to the trailing end of the block including the trailing end of the valid data at stop of the recording and to record data embedded with the padding data in a section from the trailing end of the block to the trailing end of the packet including the trailing end of the block at restart of the recording after the recording is stopped.

Abstract: The invention relates to a method of writing data to a disc (OD). The method comprised: a) performing a plurality of writing actions in which a plurality of data portions are written to the disc, b) performing a plurality of verification actions in which written data portions are at least partly verified and at least part of the data portions are replaced if needed. The method further comprises a2) performing a decision action for each writing action in which a decision whether or not to perform the verification action for a specific written data portion is taken.

Abstract: A control method of an optical disc drive includes steps of: detecting data transmission is being performed between the computer system and the optical disc drive or not; stopping supplying an operating voltage to the optical disc drive if data transmission not being performed; determining whether or not an eject switch is being pressed according to a variation in potential on a shared line when a first logic level is detected, and supplying the operating voltage to the optical disc drive if a press on the eject switch is detected and after a predetermined time ejecting a tray from the optical disc drive; and determining whether or not the tray is loaded into the optical disc drive according to a variation in potential on the shared line when a second logic level is detected, and supplying the operating voltage to the optical disc drive if the tray is loaded.

Abstract: Playback durability of a writable optical disk is ensured. A method of controlling a playback condition includes continuously irradiating an optical disk with a laser beam having a power level lower than a mark formation level and detecting a change of a state of a signal caused by a return light from the optical disk, and setting a playback condition for the optical disk according to the change of the state of the signal. The playback durability of the optical disk can be ensured by adaptively controlling the playback condition as stated above.

Abstract: An information processing device includes: a correction coefficient holding unit configured to hold a correction coefficient which is a ratio between the position of a control target at a start time of control operation, and a detection signal indicating the control result of the control target; an initial-value-compensation matrix holding unit configured to hold an initial-value-compensation matrix for performing compensation of the initial value of a control computing unit for computing control output for controlling the control target from the detection signal based on the position and speed of the control target; and an initial-value generating unit configured to correct the position and speed of the control target at a start time of control operation with the correction coefficient, and employ the position and speed of the control target after correction, and the initial-value-compensation matrix to generate an initial-value-compensation value for compensating the initial value of the control computing u

Abstract: A method for improving readability of an optical disc includes: changing a first control parameter of an optical storage apparatus that accesses the optical disc and obtaining a plurality of associated values of an index corresponding to the readability of the optical disc for respective changed/unchanged values of the first control parameter; setting the first control parameter to be an optimal value out of the changed/unchanged values of the first control parameter according to the index; changing a second control parameter with the first parameter set to be the optimal value to obtaining a plurality of associated values of the index for respective changed/unchanged values of the second control parameter; and setting the second control parameter to be an optimal value according to the index. The control parameters having their individual optimal values are utilized for further control during decoding. In addition, an associated optical storage apparatus is further provided.

Abstract: An optical recording and reproducing apparatus which suppresses the generation of a noise component in a servo signal while preventing a deterioration in using efficiency of a light beam is provided. The optical recording and reproducing apparatus has an optical pickup including a liquid crystal correcting element, a liquid crystal element control unit, a memory, and an operation mode control unit. The memory stores a plurality of correction data sets respectively corresponding to a plurality of refractive index distribution to be formed by the liquid crystal correcting element. The liquid crystal element control unit selectively reads out the correction data set corresponding to the operation mode designated by the operation mode control unit from the memory and supplies a driving voltage according to the read-out correction data set to the liquid crystal correcting element.

Abstract: A signal drive apparatus includes a first buffer circuit where a signal converted into an electric signal from a first light signal is amplified; a second buffer circuit where a signal converted into an electric signal from a second light signal is amplified; a control circuit causing one of the first and second buffer circuits to be in an operating state and causing an output stage of the other buffer circuit to be in an idle state of a high impedance, so as to output a changeover control signal which picks up either the first or the second light signal; and a voltage changeover circuit causing any one of the output stages of the first and the second buffer circuits to be in the idle state and supplying a transistor constituting the output stage with a bias voltage equal to or less than a withstand voltage of the transistor.

Abstract: After an optical disk drive according to the present invention has been loaded with an optical disk and before the operation of recognizing the type of the given disk is finished, the drive presumes one of multiple types of candidate optical disks, from/on which data is readable and writable using a light beam with the shortest wavelength among the candidate disks, to be the disk being driven by the motor now and gets the beam for the presumed type of disk radiated from a light source (Step (A)). Next, the drive gets the disk spun at a rotational velocity that realizes a linear velocity equal to or higher than a standardized normal velocity when data is read from the presumed type of disk (Step (B)). Thereafter, the drive starts a focus control in a situation where the spot of the beam being formed on the disk is moving on the disk at the linear velocity equal to or higher than the normal velocity (Step (C)).

Abstract: This invention relates to a karaoke CD format and a device for controlling audio signals utilizing the karaoke CD format which provides a user with selective reproduction of the voice of a player. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The audio sectors are further divided into a part for recording accompaniment sound and playing sound at the same time and a part for recording accompaniment sound only. There is provided record coding information for distinguishing the parts.

Abstract: This invention relates to a karaoke CD format and a device for controlling audio signals utilizing the karaoke CD format which provides a user with selective reproduction of the voice of a player. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The audio sectors are further divided into a part for recording accompaniment sound and playing sound at the same time and a part for recording accompaniment sound only. There is provided record coding information for distinguishing the parts.

Abstract: This invention relates to a karaoke CD format and a device for controlling audio signals utilizing the karaoke CD format which provides a user with selective reproduction of the voice of a player. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The audio sectors are further divided into a part for recording accompaniment sound and playing sound at the same time and a part for recording accompaniment sound only. There is provided record coding information for distinguishing the parts.

Abstract: This invention relates to a karaoke CD format and a device for controlling audio signals utilizing the karaoke CD format which provides a user with selective reproduction of the voice of a player. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The audio sectors are further divided into a part for recording accompaniment sound and playing sound at the same time and a part for recording accompaniment sound only. There is provided record coding information for distinguishing the parts.

Abstract: This invention relates to a karaoke CD format and a device for controlling audio signals utilizing the karaoke CD format which provides a user with selective reproduction of the voice of a player. The karaoke CD format includes a CD format divided into video sectors and audio sectors. The audio sectors are further divided into a part for recording accompaniment sound and playing sound at the same time and a part for recording accompaniment sound only. There is provided record coding information for distinguishing the parts.