METHOD OF GENERATING A FILE DESCRIBING A BITSTREAM, CORRESPONDING DEVICE AND COMPUTER PROGRAM PRODUCT
First Claim
1. Method for the generation of a description file describing a bitstream from a description schema describing a structure and a content compliant with a predetermined format and comprising a set of attributes and elements, said bitstream being formed by a plurality of fields, wherein said method comprises:
- assigning at least one value of at least one identified field of said stream to at least one variable defined by an attribute of said description schema, called an assignment attribute;
storing said at least one variable;
determining at least one characteristic of at least one element of said description file from an evaluation of a conditional expression relating to said at least one value;
generating a portion of said description file as a function of said characteristic or characteristics determined during said determining step.
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Accused Products
Abstract
Method of generating a file describing a bit stream, corresponding device and computer program product. The invention relates to a method of generating a description file (14) of a bit stream (11), from a description scheme (15) describing a structure and a content that are compliant with a predetermined format and comprising a set of attributes and elements, the bit stream (11) consisting of a plurality of fields. According to the invention, such a method comprises: a step for assigning at least one value of at least one identified field of the stream to at least one variable defined by an attribute of the description scheme, called assignment attribute; a step for storing said variable; a step for determining at least one characteristic of at least one element of the description file, from an evaluation of a conditional expression relating to said value; a step for generating a portion of the description file according to the characteristics determined in the determination step.
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Citations
12 Claims
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1. Method for the generation of a description file describing a bitstream from a description schema describing a structure and a content compliant with a predetermined format and comprising a set of attributes and elements, said bitstream being formed by a plurality of fields, wherein said method comprises:
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assigning at least one value of at least one identified field of said stream to at least one variable defined by an attribute of said description schema, called an assignment attribute; storing said at least one variable; determining at least one characteristic of at least one element of said description file from an evaluation of a conditional expression relating to said at least one value; generating a portion of said description file as a function of said characteristic or characteristics determined during said determining step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Device for generation of a file describing a bitstream from a description schema describing a structure and a content compliant with a predetermined format and comprising a set of attributes and elements, said bitstream being formed by a plurality of fields, wherein said device comprises:
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means of assigning at least one value of at least one identified field of said stream to at least one variable defined by an attribute of said description schema, called an assignment attribute; means of storing said at least one variable; means of determining at least one characteristic of at least one element of said description file from an evaluation of a conditional expression relating to said at least one value; means of generating a portion of said description file as a function of said characteristic or characteristics determined during said determining step.
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10. Computer program product recorded on a computer-readable carrier and comprising program code instructions for the execution of a method of generating a description file describing a bitstream from a description schema, when said program is executed on a computer, wherein the description schema describes a structure and a content compliant with a predetermined format and comprises a set of attributes and elements, said bitstream being formed by a plurality of fields, wherein said method comprises:
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assigning at least one value of at least one identified field of said stream to at least one variable defined by an attribute of said description schema, called an assignment attribute; storing said at least one variable; determining at least one characteristic of at least one element of said description file from an evaluation of a conditional expression relating to said at least one value; generating a portion of said description file as a function of said characteristic or characteristics determined during said determining step.
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11. A description file describing a bitstream stored on a computer-readable carrier, wherein the description file comprises:
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a description of a bitstream from a description schema describing a structure and a content compliant with a predetermined format and comprising a set of attributes and elements, said bitstream being having a plurality of fields; at least one value of at least one identified field of said stream assigned to at least one variable defined by an attribute of said description schema, called an assignment attribute, wherein the at least one variable is stored; at least one characteristic of at least one element of said description file determined from an evaluation of a conditional expression relating to said at least one value; wherein a portion of said description file is a function of said at least one characteristic.
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12. Method for the adaptation of scalable multimedia contents characterized in that it comprises a phase of generation of a description file (14) describing a bitstream from a description schema describing a structure and a content compliant with a predetermined format and comprising a set of attributes and elements, said bitstream being formed by a plurality of fields, wherein said method comprises:
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assigning at least one value of at least one identified field of said stream to at least one variable defined by an attribute of said description schema, called an assignment attribute; storing said at least one variable; determining at least one characteristic of at least one element of said description file from an evaluation of a conditional expression relating to said at least one value; generating a portion of said description file as a function of said characteristic or characteristics determined during said determining step.
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Specification