System and method of lattice-based search for spoken utterance retrieval
AssigneeAT&T Intellectual Property II, L.P.
InventorsMurat Saraclar, Richard William Sproat
Life of this patent
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Abstract
A system and method are disclosed for retrieving audio segments from a spoken document. The spoken document preferably is one having moderate word error rates such as telephone calls or teleconferences. The method comprises converting speech associated with a spoken document into a lattice representation and indexing the lattice representation of speech. These steps are performed typically off-line. Upon receiving a query from a user, the method further comprises searching the indexed lattice representation of speech and returning retrieved audio segments from the spoken document that match the user query.
Claims20
A method comprising:
- converting, via a processor, speech from a spoken document into a lattice representation comprising phones from the speech, wherein the lattice representation belongs to a recognition network represented as weighted finite state machines, and wherein the phones have a pronunciation length longer than a minimum pronunciation length;
- and
- indexing the lattice representation for word and topic searching.
A system comprising:
- a processor;
- and
- a computer-readable storage medium having instructions stored which, when executed by the processor, cause the processor to perform operations comprising:
- converting speech from a spoken document into a lattice representation comprising phones from the speech, wherein the lattice representation belongs to a recognition network represented as weighted finite state machines, and wherein the phones have a pronunciation length longer than a minimum pronunciation length;
- and
- indexing the lattice representation for word and topic searching.
A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising:
- converting speech from a spoken document into a lattice representation comprising phones from the speech, wherein the lattice representation belongs to a recognition network represented as weighted finite state machines, and wherein the phones have a pronunciation length longer than a minimum pronunciation length;
- and
- indexing the lattice representation for word and topic searching.
Dependencies are inferred from the claim text.