Content playback device using voice assistant service and operation method thereof

1. A content reproduction apparatus comprising:

an outputter configured to output video and audio;

a user interface configured to receive an utterance from a user;

a memory configured to store one or more instructions; and

a processor configured to execute the one or more instructions stored in the memory, to:

control the outputter to output a first screen in which one or more objects selectable by the user's utterance are included and a focus is displayed with respect to one of the one or more objects, and,

when an utterance for selecting one of the one or more objects included in the first screen is not received from the user through the user interface, control the outputter to output utterable guide information for a next selection based on the object corresponding to the focus displayed.

2. The content reproduction apparatus of claim 1 , wherein the processor controls the outputter to output the utterable guide information when the utterance for selecting one of the one or more objects is not received from the user within a predetermined time after the first screen is output.

3. The content reproduction apparatus of claim 1 , wherein the processor controls the outputter to output the utterable guide information when the user requests additional information for selecting an object through the user interface.

4. The content reproduction apparatus of claim 1 , wherein

an utterance input start signal is received from the user through the user interface, and

the processor controls the outputter to output the utterable guide information when an utterance for selecting one of the one or more objects is not received from the user after the utterance input start signal is received.

5. The content reproduction apparatus of claim 4 , wherein the processor controls the outputter to output the utterable guide information when in a state in which the utterance for selecting one of the one or more objects is not received after the utterance input start signal is received, an utterance input end signal is received from the user through the user interface.

6. The content reproduction apparatus of claim 5 , wherein

the processor is further configured to execute the one or more instructions to control the user interface to further receive a control command of the user from a control device,

the utterance input start signal is a long-pressed input of a particular key provided in the control device, and the utterance input end signal is a release of the long-pressed input.

7. The content reproduction apparatus of claim 1 , wherein

the outputter includes a display and an audio outputter configured to output the utterable guide information in a form of an utterance,

the display is configured to overlay and display a screen indicating the utterable guide information over the first screen, and

the processor is further configured to execute the one or more instructions to control the outputter to cause one or more of the audio outputter and the display to output the utterable guide information.

8. The content reproduction apparatus of claim 7 , wherein the utterable guide information includes utterance word information used to select the one or more objects by utterance.

9. The content reproduction apparatus of claim 8 , wherein the utterable guide information further includes information indicating that the utterance word information is an utterance command that the user is able to utter and give a control command.

10. The content reproduction apparatus of claim 7 , wherein the utterable guide information includes information for selecting one or more of screen movement on the display and volume control of the audio outputter.

11. The content reproduction apparatus of claim 1 , wherein the utterable guide information includes one or more of information for selecting the one or more objects and descriptive information about the one or more objects.

12. The content reproduction apparatus of claim 1 , wherein the processor is further configured to execute the one or more instructions to cause the outputter to output utterable guide information including one or more of common information about a plurality of pieces of content and an information list about each content included in the plurality of pieces of content, and output the plurality of pieces of content in a spread-out manner.

13. The content reproduction apparatus of claim 1 , wherein the utterable guide information includes one or more of descriptive information about the first screen and request information for requesting other information.

14. A content reproduction method comprising:

outputting a first screen in which one or more objects selectable based on a user's utterance, are included and a focus is displayed with respect to one of the one or more objects; and

when an utterance for selecting one of the one or more objects included in the first screen is not received from the user, outputting utterable guide information for a next selection according to the object corresponding to the focus displayed.

15. A computer-readable non-transitory recording medium having recorded thereon a program which when executed by a processor causes the processor to:

output a first screen in which one or more objects selectable by a user's utterance are included and a focus is displayed with respect to one of the one or more objects; and

when an utterance for selecting one of the one or more objects included in the first screen is not received from the user, outputting utterable guide information for a next selection according to the object corresponding to the focus displayed.