# US 2020/0288012 A1 · System and Method for Three-Way Call Detection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288012 A1 - Document ID: US20200288012A1 - Status: Published application - Kind: A1 - Application number: 16/827,501 - Filed: 2020-03-23 - Published: 2020-09-10 - Earliest claimed: 2007-02-15 - Assignees: Dsi-Iti, LLC - Applicants: Dsi-Iti, LLC - Inventors: Andreas M. OLLIGSCHLAEGER - Web page: https://patentgrep.com/patent/US20200288012A1 ## CPC - H04M 3/42221: {Conversation recording systems (at the subscriber's set H04M1/656)} - H04M 3/2281: {Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls} - H04M 3/568: {audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants (echo suppression in two-way loud-speaking telephone systems H04M9/02; sound field processing per se H04S7/30)} - H04M 11/10: with dictation recording and playback systems - H04M 1/656: for recording conversations - H04M 2201/40: using speech recognition - H04M 2201/60: Medium conversion - H04M 2250/74: with voice recognition means - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract A system for detecting three-way calls in a monitored telephone conversation includes a speech recognition processor that transcribes the monitored telephone conversation and associates characteristics of the monitored telephone conversation with a transcript thereof, a database to store the transcript and the characteristics associated therewith, and a three-way Call detection processor to analyze the characteristics of the conversation and to detect therefrom the addition of one or more parties to the conversation. The system preferably includes at least one domain-specific language model that the speech recognition processor utilizes to transcribe the conversation. The system may operate in real-time or on previously recorded conversations. A query and retrieval system may be used to retrieve and review call records from the database. ## Claims ### Claim 1 A system for detecting a three-way call in a monitored telephone conversation, the system comprising: one or more circuits configured to: convert an audio of the monitored telephone conversation to a transcript using a domain specific language model; detect a pattern within the monitored telephone conversation based on the transcript of the monitored telephone conversation, the pattern being an indicator of the three-way call; generate output information based on the pattern, the output information including timing information and weighting information corresponding to the pattern; and determine that the monitored telephone conversation includes the three-way call based on the output information. ### Claim 2 (depends on 1) The system of claim 1, wherein the one or more circuits are further configured to tag the transcript with a timestamp at a starting point of the three-way call in the monitored telephone conversation. ### Claim 3 (depends on 1) The system of claim 1, wherein the one or more circuits are further configured to store at least one of the audio and the transcript to a database. ### Claim 4 (depends on 1) The system of claim 1, wherein to convert the audio of the monitored telephone conversation to the transcript using the domain specific language model, the one or more circuits are configured to: translate the transcript of the monitored telephone conversations from a first language into a second language. ### Claim 5 (depends on 1) The system of claim 1, wherein to detect the three-way call based on the output information, the one or more circuits are configured to: determine a value corresponding to the pattern; and determine that the value is greater than a predetermined threshold. ### Claim 6 (depends on 1) The system of claim 1, wherein the output information is a matrix comprising a plurality of characteristics or patterns identified within the transcript of the monitored telephone conversation. ### Claim 7 (depends on 1) The system of claim 1, wherein the pattern includes one or more of a frequency of the utterance of the phrase during the monitored telephone conversation, a timing of the utterance of the phrase during the monitored telephone conversation, or an entity extracted from the utterance of the phrase. ### Claim 8 (depends on 1) The system of claim 1, wherein the monitored telephone conversation is one of a monitored voice over IP (VOIP) telephone call or a monitored plain old telephone system (POTS) call. ### Claim 9 A method for detecting a three-way call in a monitored telephone conversation, the method comprising: converting an audio of the monitored telephone conversation to a transcript using a domain specific language model; detecting a pattern within the monitored telephone conversation based on the transcript of the monitored telephone conversation, the pattern being an indicator of the three-way call; generating output information based on the pattern, the output information including timing information and weighting information corresponding to the pattern; and determining that the monitored telephone conversation includes the three-way call based on the output information. ### Claim 10 (depends on 9) The method according to claim 9, further comprising: storing at least one of the audio and the transcript to a database. ### Claim 11 (depends on 9) The method according to claim 9, further comprising: tagging the transcript with a timestamp at a starting point of the three-way call in the monitored telephone conversation. ### Claim 12 (depends on 11) The method according to claim 11, further comprising: providing a synchronized presentation of the audio and the transcript. ### Claim 13 (depends on 9) The method according to claim 9, wherein converting the spoken audio of the monitored telephone conversation to the transcript using the domain specific language model, comprises: translating the transcript of the monitored telephone conversations from a first language into a second language. ### Claim 14 (depends on 9) The method according to claim 9, wherein detecting the three-way call based on the output information, comprises: determining a value corresponding to the pattern; and determining that the value is greater than a predetermined threshold. ### Claim 15 (depends on 9) The method according to claim 9, wherein the output information is a matrix comprising a plurality of characteristics or patterns identified within the transcript of the monitored telephone conversation ### Claim 16 (depends on 9) The method according to claim 9, wherein the pattern includes one or more of a frequency of the utterance of the phrase during the monitored telephone conversation, a timing of the utterance of the phrase during the monitored telephone conversation, or an entity extracted from the utterance of the phrase. ### Claim 17 A non-transitory computer-readable device having instructions stored thereon that, when executed by at least one computing device, causes the at least one computing device to perform operations comprising: converting an audio of the monitored telephone conversation to a transcript using a domain specific language model; detecting a pattern within the monitored telephone conversation based on the transcript of the monitored telephone conversation, the pattern being an indicator of the three-way call; generating output information based on the pattern, the output information including timing information and weighting information corresponding to the pattern; and determining that the monitored telephone conversation includes the three-way call based on the output information. ### Claim 18 (depends on 17) The non-transitory computer-readable device of claim 17, the operations further comprising: tagging the transcript with a timestamp at a starting point of the three-way call in the monitored telephone conversation. ### Claim 19 (depends on 18) The non-transitory computer-readable device of claim 18, wherein the output information is a matrix comprising a plurality of characteristics or patterns identified within the transcript of the monitored telephone conversation. ### Claim 20 (depends on 17) The non-transitory computer-readable device of claim 17, wherein the pattern includes one or more of a frequency of the utterance of the phrase during the monitored telephone conversation, a timing of the utterance of the phrase during the monitored telephone conversation, or an entity extracted from the utterance of the phrase.