Broadcast signal playback method, map generation method, and apparatus

Patent metadata

Field	Value
Publication number	US-12476725-B2
Application number	US-202318178112-A
Country	US
Kind code	B2
Filing date	Mar 3, 2023
Priority date	Sep 4, 2020
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

The application discloses example methods and apparatuses for map generation and for playing broadcast signals. One example map generation method includes receiving multiple pieces of first information, where each piece of the multiple pieces of first information includes a corresponding positioning location of a corresponding terminal, strength of a broadcast signal modulated at a first modulation frequency and received by the corresponding terminal at the corresponding positioning location, and the first modulation frequency. A broadcast signal strength layer is generated according to the multiple pieces of first information, where the broadcast signal strength layer represents a first coverage range corresponding to a first strength range of a broadcast signal modulated at the first modulation frequency.

First claim

What is claimed is:

1 . A map generation apparatus, comprising at least one processor and at least one memory coupled to the at least one processor, wherein the at least one memory stores program instructions that when executed by the at least one processor, cause the map generation apparatus to perform operations comprising:
receiving a plurality of pieces of first information, wherein each piece of the plurality of pieces of first information comprises a corresponding positioning location of a corresponding terminal, strength of a broadcast signal modulated at a first modulation frequency and received by the corresponding terminal at the corresponding positioning location, and the first modulation frequency; and generating a broadcast signal strength layer according to the plurality of pieces of first information and at least one coverage range corresponding to at least one strength range of a broadcast signal modulated at a second modulation frequency by training data in the plurality of pieces of first information, wherein the at least one coverage range is preset based on a modulation frequency of a broadcast signal and geographic information, wherein the broadcast signal strength layer represents a first coverage range corresponding to a first strength range of the broadcast signal modulated at the first modulation frequency.

2 . The map generation apparatus according to claim 1 , wherein the operations further comprise:
determining a boundary of the first coverage range according to a plurality of positioning locations in the plurality of pieces of first information.

3 . The map generation apparatus according to claim 2 , wherein the operations further comprise:
determining the boundary of the first coverage range according to (1) a plurality of comparison results obtained by separately comparing strength that is of each broadcast signal received by a respective terminal at a respective positioning location and that is in the plurality of pieces of first information with a preset first strength threshold, and (2) the plurality of positioning locations in the plurality of pieces of first information.

4 . The map generation apparatus according to claim 1 , wherein the broadcast signal strength layer further represents a second coverage range corresponding to a second strength range of the broadcast signal modulated at the first modulation frequency.

5 . The map generation apparatus according to claim 1 , wherein the operations further comprise:
receiving a plurality of pieces of second information, wherein each piece of the plurality of pieces of second information comprises a respective positioning location of a respective terminal, strength of a broadcast signal modulated at the second modulation frequency and received by the respective terminal at the respective positioning location, and the second modulation frequency, wherein the broadcast signal strength layer is generated further according to the plurality of pieces of second information, and wherein the broadcast signal strength layer further represents the at least one coverage range.

6 . The map generation apparatus according to claim 5 ,
wherein the plurality of pieces of first information are from a plurality of terminals.

7 . A map generation apparatus, comprising at least one processor and at least one memory, wherein the at least one memory stores program instructions that when executed by the at least one processor, cause the map generation apparatus to perform operations comprising:
obtaining a first positioning location of a terminal; detecting strength of a broadcast signal received by the terminal at the first positioning location; and sending first information to a server, wherein the first information comprises the first positioning location, the strength of the broadcast signal received by the terminal at the first positioning location, and a modulation frequency of the broadcast signal, and the first information is used to determine a coverage range corresponding to a strength range of a broadcast signal in a broadcast signal strength layer, wherein the broadcast signal strength layer is generated according to a plurality of pieces of first information comprising the first information and at least one coverage range corresponding to at least one strength range of a broadcast signal modulated at a second modulation frequency by training data in the plurality of pieces of first information, and wherein the at least one coverage range is preset based on a modulation frequency of a broadcast signal and geographic information.

8 . The map generation apparatus according to claim 7 , wherein the operations further comprise:
determining, by comparing the strength of the broadcast signal received by the terminal at the first positioning location with a preset threshold of the strength range, that the first positioning location is at a boundary of the coverage range.

9 . An apparatus for playing broadcast signal, the apparatus comprising at least one processor and at least one memory, wherein the at least one memory stores program instructions that when executed by the at least one processor, cause the apparatus to perform operations comprising:
receiving, a broadcast signal strength layer from a map server, wherein the broadcast signal strength layer is a map layer, and the broadcast signal strength layer represents a coverage range of a broadcast signal corresponding to a strength level of the broadcast signal; switching, at a first moment according to a current positioning location of a terminal, a current motion status of the terminal, a future driving path of the terminal, and the broadcast signal strength layer, from a first state in which only a first broadcast signal is received to a second state in which both the first broadcast signal and a second broadcast signal are received, wherein types of the first broadcast signal and the second broadcast signal are different, wherein there is a delay in the second broadcast signal relative to the first broadcast signal; playing, the received first broadcast signal at a single rate when the terminal is in the first state; playing, the received first broadcast signal when the terminal is in the second state, wherein the first broadcast signal is performed at a lower rate than the single rate when being in the second state; switching, at a second moment, from the second state to a third state in which only the second broadcast signal is received, wherein the second moment is a moment of first synchronization between the played first broadcast signal and the received second broadcast signal; and playing, the second broadcast signal at the single rate when the terminal is in the third state.

10 . The apparatus according to claim 9 , wherein there is a delay in the first broadcast signal relative to the second broadcast signal, the terminal plays the first broadcast signal at the single rate and buffers the received second broadcast signal when being in the second state, and the operations further comprise:
switching, at a second moment, from the second state to a third state in which only the second broadcast signal is received, wherein the second moment is a moment of second synchronization between the played first broadcast signal and the buffered second broadcast signal; playing, in the third state, the buffered second broadcast signal at a rate higher than the single rate, and continuing to buffer the received second broadcast signal; switching, from the third state to a fourth state at a third moment, wherein the third moment is a moment of third synchronization between the buffered second broadcast signal and the played second broadcast signal; and playing, the r

Assignees

• Shenzhen Yinwang Intelligent Technology Co Ltd

Inventors

• Su Derun
• Cui Xiushuai
• Zhang Guicheng

Classifications

• H04H20/57 Primary

  for mobile receivers · CPC title

• H04H20/24

  Arrangements for distribution of identical information via broadcast system and non-broadcast system · CPC title

• H04H20/20

  Arrangements for broadcast or distribution of identical information via plural systems · CPC title

• H04H20/26

  Arrangements for switching distribution systems · CPC title

• H04H60/53

  of destinations · CPC title