초록 ▼

The present invention discloses a method and system for streaming an information stream from a producer to N consumers in a multi-process environment. An inter-process communication (IPC) channel containing a shared memory is provided between the producer and at least one of N consumers. The informa

The present invention discloses a method and system for streaming an information stream from a producer to N consumers in a multi-process environment. An inter-process communication (IPC) channel containing a shared memory is provided between the producer and at least one of N consumers. The information stream is written into the shared memory by way of a producer-side interface. The information stream is read from the shared memory by way of a consumer-side interface.

대표청구항 ▼

The present invention discloses a method and system for streaming an information stream from a producer to N consumers in a multi-process environment. An inter-process communication (IPC) channel containing a shared memory is provided between the producer and at least one of N consumers. The informa

The present invention discloses a method and system for streaming an information stream from a producer to N consumers in a multi-process environment. An inter-process communication (IPC) channel containing a shared memory is provided between the producer and at least one of N consumers. The information stream is written into the shared memory by way of a producer-side interface. The information stream is read from the shared memory by way of a consumer-side interface. ation data to be accessed by accessing the content at the identified address position of the attributive information data in said list; and said list producing means generates a response to the command upon receipt of the command, said response being based on the attributive information data accessed by said accessing means, and said response having a data format of a combination of the command data and the obtained attributive information data. 5. The apparatus as claimed in claim 3, wherein: the command data includes an ID code of an item of attributive information data to be written and the content of the item of attributive information data to be written, the command data having a data format including a command name field and an information content field containing the content of the item of attributive information data to be written; the command for accessing includes a command to write the item of attributive information in said list; and said apparatus comprises means for writing the item of attributive information onto the address position of a corresponding item of attributive information in said list. 6. The apparatus as claimed in claim 3, wherein: the auxiliary information includes items of status information each being indicative of a status of a transition of the main data in said apparatus; the command data includes an ID code of an item of status information to be accessed; said accessing means identifies an address position of the content of the item of status information to be accessed in said list based on the ID code of the item of status information to be accessed, and obtains the content of the item of status information to be accessed by accessing the content at the identified address position of the status information in said list; and said list producing means generates a response to the command upon receipt of the command, said response being based on the status information accessed by said accessing means, and said response having a data format of a combination of the command data and the obtained status information. 7. The apparatus as claimed in claim 6, wherein said list of auxiliary information includes a plurality of items of status information, each item having a data format construction including content of the status information of the item and the corresponding ID code appended to the item. 8. The apparatus as claimed in claim 2, wherein: the command data includes a command for inquiring a list of the contents of the items of auxiliary information contained in said list of auxiliary information; the command data comprises a command name field indicative of a command name and a list designation field for designating a list of the items; and said list producing means generates a response to the command by producing a list of the ID codes corresponding to the items contained in said list of auxiliary information, said response having a data format of a combination of the produced list of ID codes added to the command data. 9. The apparatus as claimed in claim 1, wherein the digital interface is a serial transmission system defined by IEEE 1394 standard, using AV/C commands and responses defined by IEC 61883 standard as a host transmission protocol. 10. The apparatus as claimed in claim 1, wherein: the auxiliary information includes items of status information each being indicative of a status of a transaction of the main data in said apparatus; and the attribute indicated by the attributive information is title information. 11. A data structure of command data for use with a data transmission apparatus for sending main data recorded on a recording medium to an external equipment and receiving main data recorded on another recording medium from the external equipment via a digital interface based on said command data sent from the external equipment, wherein the data transmission apparatus comprises: an auxiliary information storage means for storing items of auxi