Determining whether speech input is intended for a digital assistant

An electronic device, comprising:

• one or more processors;
• a memory;
• and
• one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for:
• receiving a first speech input representing a first user utterance;
• initiating, by a digital assistant operating on the electronic device, a first task based on the first speech input;
• providing a first output indicative of the initiated first task;
• and
• after providing the first output:
• receiving a second speech input following the first speech input, the second speech input representing a second user utterance;
• determining, based on a textual representation of the second speech input, a first score representing a correspondence between the second user utterance and a domain recognized by the digital assistant;
• determining, based on the textual representation of the second speech input, a second score representing contextual continuity between the first user utterance and the second user utterance;
• determining, based on the first score and the second score, whether the second speech input is intended for the digital assistant;
• and
• in accordance with a determination that the second speech input is intended for the digital assistant:
• initiating, by the digital assistant, a second task based on the second speech input;
• and
• providing a second output indicative of the initiated second task.

A method, comprising:

• at an electronic device with one or more processors and memory:
• receiving a first speech input representing a first user utterance;
• initiating, by a digital assistant operating on the electronic device, a first task based on the first speech input;
• providing a first output indicative of the initiated first task;
• and
• after providing the first output:
• receiving a second speech input following the first speech input, the second speech input representing a second user utterance;
• determining, based on a textual representation of the second speech input, a first score representing a correspondence between the second user utterance and a domain recognized by the digital assistant;
• determining, based on the textual representation of the second speech input, a second score representing contextual continuity between the first user utterance and the second user utterance;
• determining, based on the first score and the second score, whether the second speech input is intended for the digital assistant;
• and
• in accordance with a determination that the second speech input is intended for the digital assistant:
• initiating, by the digital assistant, a second task based on the second speech input, and
• providing a second output indicative of the initiated second task.