WO2017124578A1 - 频道切换方法及装置 - Google Patents

频道切换方法及装置 Download PDF

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Publication number
WO2017124578A1
WO2017124578A1 PCT/CN2016/072358 CN2016072358W WO2017124578A1 WO 2017124578 A1 WO2017124578 A1 WO 2017124578A1 CN 2016072358 W CN2016072358 W CN 2016072358W WO 2017124578 A1 WO2017124578 A1 WO 2017124578A1
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WO
WIPO (PCT)
Prior art keywords
channel
code stream
marked
stream
marking instruction
Prior art date
Application number
PCT/CN2016/072358
Other languages
English (en)
French (fr)
Inventor
施蓓
Original Assignee
深圳创维－Rgb电子有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳创维－Rgb电子有限公司 filed Critical 深圳创维－Rgb电子有限公司
Priority to AU2016269453A priority Critical patent/AU2016269453A1/en
Priority to US15/319,382 priority patent/US20170318342A1/en
Publication of WO2017124578A1 publication Critical patent/WO2017124578A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44213—Monitoring of end-user related data
    • H04N21/44222—Analytics of user selections, e.g. selection of programs or purchase activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4438—Window management, e.g. event handling following interaction with the user interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/812—Monomedia components thereof involving advertisement data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/84—Generation or processing of descriptive data, e.g. content descriptors

Definitions

  • the present invention relates to the field of television technologies, and in particular, to a channel switching method and apparatus.
  • the main object of the present invention is to provide a channel switching method and apparatus, aiming at solving the problem that channel switching cannot be automatically performed according to program information.
  • the present invention provides a channel switching method, where the channel switching method includes the following steps:
  • the step of monitoring the code stream of the frequency point of the marked channel after the channel switching of the television further includes:
  • the marked channel is updated with the channel corresponding to the marking instruction.
  • the step of determining whether the type of the code stream is a program stream comprises:
  • the content descriptor exists in the code stream, it is determined whether the type of the code stream is a program stream according to a content descriptor in the code stream.
  • the method further includes:
  • the content descriptor does not exist in the code stream, it is determined whether the type of the code stream is a program stream according to the feature information of the code stream.
  • the step of determining, according to the feature information of the code stream, whether the type of the code stream is a program stream includes:
  • the channel switching method before the step of monitoring the code stream of the frequency point of the marked channel, the channel switching method further includes:
  • the step of monitoring the code stream of the frequency point of the channel marked by the flag is performed.
  • the present invention further provides a channel switching apparatus, where the channel switching apparatus includes:
  • a monitoring module configured to monitor a code stream of a frequency point where the marked channel is located after the channel switching of the television
  • a judging module configured to determine whether the type of the code stream is a program stream, where the type of the code stream includes a program stream and an advertisement stream;
  • a switching module configured to switch the current channel back to the marked channel if the type of the code stream is a program stream.
  • the channel switching apparatus further includes:
  • a receiving module configured to receive a marking instruction triggered by the user based on the current channel
  • the determining module is further configured to: when receiving the marking instruction, determine whether the channel corresponding to the marking instruction is the same as the marked channel;
  • an updating module configured to: if the channel corresponding to the marking instruction is different from the marked channel, update the marked channel by using a channel corresponding to the marking instruction.
  • the determining module includes:
  • a detecting unit configured to detect whether a content descriptor exists in the code stream
  • a determining unit configured to determine, according to the content descriptor in the code stream, whether the type of the code stream is a program stream when the content descriptor exists in the code stream.
  • the determining unit is further configured to: when the content descriptor is not present in the code stream, determine, according to the feature information of the code stream, whether the type of the code stream is a program stream;
  • the determining unit includes:
  • a determining subunit configured to determine, according to the image feature information and/or the audio feature information, whether the type of the code stream is a program stream.
  • the determining module is further configured to: after the channel switching by the television, determine whether the current channel is the same as the marked channel;
  • the monitoring module is further configured to monitor a code stream of a frequency point where the marked channel is located.
  • the present invention determines whether the code stream type is a program stream by real-time or timing monitoring a code stream of a frequency point of the marked channel after the channel switching of the television, and when determining that the code stream type is a program stream, Triggering a return instruction, automatically switching the current channel back to the marked channel according to the return instruction, effectively solving the problem that the channel switching cannot be automatically performed according to the program information, and improving the punctuality of the channel switching.
  • FIG. 1 is a schematic flowchart of a first embodiment of a channel switching method according to the present invention
  • FIG. 2 is a schematic diagram showing the step of refining whether the type of the code stream is a program stream in FIG. 1;
  • FIG. 3 is a schematic diagram showing the step of refining whether the type of the code stream is a program stream according to the feature information of the code stream in FIG. 2;
  • FIG. 4 is a schematic flowchart diagram of a second embodiment of a channel switching method according to the present invention.
  • FIG. 5 is a schematic flowchart diagram of a third embodiment of a channel switching method according to the present invention.
  • FIG. 6 is a schematic diagram of functional modules of a first embodiment of a channel switching apparatus according to the present invention.
  • FIG. 7 is a schematic diagram of a refinement function module of the judging module in FIG. 6;
  • FIG. 8 is a schematic diagram of functional modules of a second embodiment of a channel switching apparatus according to the present invention.
  • the present invention provides a channel switching method.
  • FIG. 1 is a schematic flowchart diagram of a first embodiment of a channel switching method according to the present invention.
  • the channel switching method includes:
  • Step S10 after the channel switching of the television, monitoring the code stream of the frequency point where the marked channel is located;
  • the application scenario is a television receiver having two high frequency heads or a television receiver having a full frequency high frequency head.
  • the program content played by the current channel is an interstitial advertisement, and the user does not want to watch the advertisement, and the current channel is switched to other channels, but at the same time, the user wants the current channel advertisement to be automatically activated after being played. Switching back to the current channel to continue watching the program of the current channel, the user needs to mark the current channel before switching the current channel to other channels.
  • the marking instruction for the current channel can be triggered by pressing a button with a channel marking function on the remote controller, or by pressing a button with a channel marking function provided by the button panel of the television receiver. A tagged instruction for the current channel. After receiving the user-triggered marking instruction for the current channel, the television receiver marks the current channel and saves the marked channel for subsequent automatic switching back to the marked channel.
  • the TV When the TV performs channel switching, it monitors the code stream of the frequency point where the marked channel is located.
  • the channel switching may be one channel switching or multiple channel switching.
  • the code stream of the frequency point at which the marked channel is located is monitored until the current channel switches back to the marked channel.
  • there are two ways to monitor the code stream of the frequency point where the marked channel is located 1) If there are two high frequency heads in the television receiver, one of the high frequency heads of the television receiver uses the frequency of the marked channel as the monitoring frequency point, and performs real-time or timed monitoring on the code stream of the frequency point.
  • the other tuner is responsible for receiving the code stream of the frequency of the channel after switching the channel, and demultiplexing and decoding the received code stream, and finally transmitting the processed code stream to the television set. a display port for the television to play the television program corresponding to the code stream. 2) If the tuner of the television receiver is a full-frequency tuner, the full-frequency tuner monitors the code stream of the frequency point of the marked channel in real time or timing, and receives the frequency of the channel after switching the channel. a bit stream of the point, and demultiplexing, decoding, and the like of the received code stream, and finally transmitting the processed code stream to a display port of the television for the television to play the corresponding stream TV show.
  • Step S20 determining whether the type of the code stream is a program stream, where the type of the code stream includes a program stream and an advertisement stream;
  • the type of the code stream is a program stream is determined by real-time or timing monitoring of the code stream of the frequency point corresponding to the marked channel.
  • the type of the code stream includes a program stream and an advertisement stream.
  • the program stream refers to that the video picture content corresponding to the code stream is a video program, and the video program includes a movie, a TV series, a variety show, etc.
  • the advertisement stream refers to that the video picture content corresponding to the code stream is a cut-in broadcast. advertisment.
  • Step S30 if yes, switching the current channel back to the marked channel.
  • the current channel is switched back to the marked channel.
  • a channel return instruction is triggered, and after receiving the channel return instruction, the television receiver switches the current channel back to the marked channel.
  • the code stream received by the tuner of the channel of the monitoring flag may be demultiplexed, decoded, and the like, and finally the processed code stream is finally processed.
  • the code stream currently transmitted by the full-frequency tuner to the display port of the television can be directly switched to the code stream of the frequency point corresponding to the marked channel for playing on the television.
  • the code stream corresponds to a television program, thereby enabling switching of the current channel back to the marked channel.
  • the present invention determines whether the code stream type is a program stream by monitoring the code stream of the frequency point of the marked channel in real time or timing after the channel switching, and triggers a return instruction when it is determined that the code stream type is a program stream. Automatically switching the current channel back to the marked channel according to the return instruction, effectively solving the problem that the channel switching cannot be automatically performed according to the program information, improving the punctuality of the channel switching, and improving the punctuality of the channel switching, and further Make users get a better experience.
  • the step S20 includes:
  • Step S21 detecting whether a content descriptor exists in the code stream
  • the determination may be made by detecting whether a content descriptor exists in the code stream.
  • the code stream of the frequency point where the marked channel is located is demultiplexed, and the event information table in the demultiplexed code stream is obtained.
  • the event information table provides event information contained in each service in chronological order, is a further description of a certain program, and includes data related to the event or program, such as the name of the event or program, start time, duration, and play. Status, whether encryption, basic stream type, program type, age limit, etc., are divided into present, following, and schedule, which contain information about the current event and the next event, and all events scheduled in a long period of time. information.
  • detecting whether Content is present in the event information table
  • a descriptor that provides content information for the program, including the type of program, start time, and duration.
  • Step S22 when the content descriptor exists in the code stream, determining, according to a content descriptor in the code stream, whether the type of the code stream is a program stream;
  • the type of the code stream can be directly determined according to the description of the program type in the content descriptor. Is it a program stream or an advertisement stream.
  • Step S23 When the content descriptor does not exist in the code stream, determine whether the type of the code stream is a program stream according to the feature information of the code stream.
  • the content descriptor When it is detected that the content descriptor does not exist in the code stream, it may be determined, according to the feature information of the code stream, whether the type of the code stream is a program stream, and the feature information of the code stream includes image characteristic information of the code stream. And audio feature information.
  • the step of determining, according to the feature information of the code stream, whether the type of the code stream is a program stream includes:
  • Step S231 acquiring image feature information and/or audio feature information of the code stream
  • Step S232 determining whether the type of the code stream is a program stream according to the image feature information and/or the audio feature information.
  • the code stream includes a video code stream and an audio code stream.
  • the image characteristic information of the code stream is image feature information of the video code stream, and the image feature information includes a correlation between adjacent frames, an advertisement trademark information, and a switching frequency of the video picture.
  • the adjacent image frames in the video code stream can be analyzed to obtain correlation between adjacent frames in the video code stream, and the correlation between the adjacent frames can be used to determine the continuity of the current video frame.
  • sexuality the greater the correlation between adjacent frames, the more continuous the video picture, usually the picture continuity of the advertisement stream is lower than the picture continuity of the program stream, so the code stream can be judged according to the correlation of adjacent frames.
  • the program stream is still an advertisement stream.
  • the correlation of the adjacent frames is greater than or equal to a preset value, determining that the code stream is a program stream, and if the correlation of the adjacent frames is less than a preset value, determining that the code stream is an advertisement Streaming; the image of the image frame in the video stream can be extracted to extract the advertising trademark information in the image frame.
  • various advertising trademark information is pre-stored in the system, and is extracted in all image frames. If the advertisement trademark information is not available, the code stream may be determined to be a program stream. If the advertisement trademark information can be extracted from the image frame, the code stream may be a program stream or an advertisement stream; The picture switching frequency in the stream is analyzed to obtain the picture switching frequency in the video code stream.
  • the picture switching frequency of the advertisement stream is higher than the picture switching frequency of the program stream, so the code stream can be determined according to the switching frequency of the picture.
  • the program stream is also an advertisement stream. If the switching frequency of the screen is less than a preset value, the code stream is determined to be a program stream. If the switching frequency of the screen is greater than or equal to a preset value, the code stream is determined to be an advertisement stream. After determining the type of the code stream by the above method, it is finally determined whether the code stream is a program stream or an advertisement stream according to different weights of the respective methods.
  • the audio feature information of the code stream is audio feature information of the audio code stream
  • the audio feature may be a spectral feature of the audio code stream, which is obtained by pre-preserving the spectral features of the audio stream of various advertisements.
  • the spectral characteristics of the code stream are matched to the spectral characteristics of the pre-stored commercial audio stream to identify whether the audio stream is a program stream or an advertisement stream. Further, in order to determine the type of the code stream more accurately, after the image feature information and the audio feature information of the code stream are acquired, the acquired image feature information and audio characteristic information may be used to determine the Whether the code stream is a program stream.
  • the channel by detecting whether there is a content descriptor in the code stream, when there is a content descriptor in the code stream, determining, according to content in the content descriptor, whether the type of the code stream is a program stream, When there is no content descriptor in the code stream, it is determined whether the type of the code stream is a program stream according to the feature information of the code stream, so that the type of the code stream is accurately identified, and the channel is switched on time.
  • the marked channel provides the basis.
  • the channel switching method further includes:
  • Step S40 after the TV performs channel switching, it is determined whether the current channel and the marked channel are the same;
  • step S10 is performed to monitor the code stream of the frequency point where the marked channel is located.
  • the user may switch the channel back to the marked channel after switching multiple channels.
  • the code stream of the frequency point of the marked channel may be stopped, so In order to save energy, after the channel switching of the television, it can be judged whether the current channel and the marked channel are the same. When the current channel is the same as the marked channel, the code of the frequency point of the marked channel is directly stopped. The monitoring of the stream monitors the code stream of the marked frequency point of the channel when the current channel is different from the marked channel.
  • the code stream of the frequency point of the marked channel is stopped, thereby reducing the power consumption of the device.
  • the method further includes:
  • Step S50 receiving a marking instruction triggered by the user based on the current channel
  • Step S60 when receiving the marking instruction, determining whether the channel corresponding to the marking instruction is the same as the marked channel;
  • step S70 if they are not the same, the marked channel is updated by using the channel corresponding to the marking instruction.
  • the user may prefer to watch the video program of the current channel, the user will mark the current channel again, and the television receiver will judge the received mark when receiving the mark instruction. Whether the channel corresponding to the instruction is the same as the marked channel, to determine whether the marked channel needs to be updated, and if different, the marked channel is updated with the channel corresponding to the marking instruction, and saved, in the newly marked channel.
  • the user switches the channel to another channel again, and when it automatically returns to the marked channel in the future, it will automatically switch back to the newly marked channel without switching back to the previously marked channel.
  • the previous marked channel is channel 1
  • the switched channel is channel 2
  • the switched channel is the new marked channel
  • the channel after switching is channel 3
  • the current channel will be 3 Automatically switch back to the new tag channel 2 instead of switching back to channel 1.
  • the marked channel will be updated after the new channel is marked, and the updated marked channel is used as the new marked channel, so that the automatic switching is performed. Returning the channel of the new tag improves the user's viewing comfort.
  • the invention further provides a channel switching device.
  • FIG. 6 is a schematic diagram of functional modules of a first embodiment of a channel switching apparatus according to the present invention.
  • the channel switching apparatus includes: a monitoring module 10, a determining module 20, and a switching module 30.
  • the monitoring module 10 is configured to monitor a code stream of a frequency point where the marked channel is located after the television channel is switched;
  • the application scenario is a television receiver having two high frequency heads or a television receiver having a full frequency high frequency head.
  • the program content played by the current channel is an interstitial advertisement, and the user does not want to watch the advertisement, and the current channel is switched to other channels, but at the same time, the user wants the current channel advertisement to be automatically activated after being played. Switching back to the current channel to continue watching the program of the current channel, the user needs to mark the current channel before switching the current channel to other channels.
  • the marking instruction for the current channel can be triggered by pressing a button with a channel marking function on the remote controller, or by pressing a button with a channel marking function provided by the button panel of the television receiver. A tagged instruction for the current channel. After receiving the user-triggered marking instruction for the current channel, the television receiver marks the current channel and saves the marked channel for subsequent automatic switching back to the marked channel.
  • the TV When the TV performs channel switching, it monitors the code stream of the frequency point where the marked channel is located.
  • the channel switching may be one channel switching or multiple channel switching.
  • the code stream of the frequency point at which the marked channel is located is monitored until the current channel switches back to the marked channel.
  • there are two ways to monitor the code stream of the frequency point where the marked channel is located 1) If there are two high frequency heads in the television receiver, one of the high frequency heads of the television receiver uses the frequency of the marked channel as the monitoring frequency point, and performs real-time or timed monitoring on the code stream of the frequency point.
  • the other tuner is responsible for receiving the code stream of the frequency of the channel after switching the channel, and demultiplexing and decoding the received code stream, and finally transmitting the processed code stream to the television set. a display port for the television to play the television program corresponding to the code stream. 2) If the tuner of the television receiver is a full-frequency tuner, the full-frequency tuner monitors the code stream of the frequency point of the marked channel in real time or timing, and receives the frequency of the channel after switching the channel. a bit stream of the point, and demultiplexing, decoding, and the like of the received code stream, and finally transmitting the processed code stream to a display port of the television for the television to play the corresponding stream TV show.
  • the determining module 20 is configured to determine whether the type of the code stream is a program stream, where the type of the code stream includes a program stream and an advertisement stream;
  • the type of the code stream is a program stream is determined by real-time or timing monitoring of the code stream of the frequency point corresponding to the marked channel.
  • the type of the code stream includes a program stream and an advertisement stream.
  • the program stream refers to that the video picture content corresponding to the code stream is a video program, and the video program includes a movie, a TV series, a variety show, etc.
  • the advertisement stream refers to that the video picture content corresponding to the code stream is a cut-in broadcast. advertisment.
  • the determining module 20 is further configured to: after the channel switching by the television, determine whether the current channel is the same as the marked channel;
  • the monitoring module 10 is further configured to monitor a code stream of a frequency point where the marked channel is located.
  • the user may switch the channel back to the marked channel after switching multiple channels.
  • the code stream of the frequency point of the marked channel may be stopped, so In order to save energy, after the channel switching of the television, it can be judged whether the current channel and the marked channel are the same. When the current channel is the same as the marked channel, the code of the frequency point of the marked channel is directly stopped. The monitoring of the stream, when the current channel is different from the marked channel, continues to monitor the code stream of the marked frequency of the channel.
  • the switching module 30 is configured to switch the current channel back to the marked channel if the type of the code stream is a program stream.
  • the current channel is switched back to the marked channel.
  • a channel return instruction is triggered, and after receiving the channel return instruction, the television receiver switches the current channel back to the marked channel.
  • the code stream received by the tuner of the channel of the monitoring flag may be demultiplexed, decoded, and the like, and finally the processed code stream is finally processed.
  • the code stream currently transmitted by the full-frequency tuner to the display port of the television can be directly switched to the code stream of the frequency point corresponding to the marked channel for playing on the television.
  • the code stream corresponds to a television program, thereby enabling switching of the current channel back to the marked channel.
  • the present invention determines whether the code stream type is a program stream by monitoring the code stream of the frequency point of the marked channel in real time or timing after the channel switching, and triggers a return instruction when it is determined that the code stream type is a program stream. Automatically switching the current channel back to the marked channel according to the return instruction, effectively solving the problem that the channel switching cannot be automatically performed according to the program information, improving the punctuality of the channel switching, and improving the punctuality of the channel switching, and further Make users get a better experience.
  • the determining module 20 includes: a detecting unit 21 and a determining unit 22.
  • the detecting unit 21 is configured to detect whether a content descriptor exists in the code stream
  • the determination may be made by detecting whether a content descriptor exists in the code stream.
  • the code stream of the frequency point where the marked channel is located is demultiplexed, and the event information table in the demultiplexed code stream is obtained.
  • the event information table provides event information contained in each service in chronological order, is a further description of a certain program, and includes data related to the event or program, such as the name of the event or program, start time, duration, and play. Status, whether encryption, basic stream type, program type, age limit, etc., are divided into present, following, and schedule, which contain information about the current event and the next event, and all events scheduled in a long period of time. information.
  • detecting whether Content is present in the event information table
  • a descriptor that provides content information for the program, including the type of program, start time, and duration.
  • the determining unit 22 is configured to determine, according to the content descriptor in the code stream, whether the type of the code stream is a program stream when the content descriptor exists in the code stream;
  • the type of the code stream can be directly determined according to the description of the program type in the content descriptor. Is it a program stream or an advertisement stream.
  • the determining unit 22 is further configured to determine, according to the feature information of the code stream, whether the type of the code stream is a program stream when the content descriptor is not present in the code stream.
  • the determining unit 22 includes an obtaining subunit 221 and a judging subunit 222.
  • the acquiring subunit 221 is configured to acquire image feature information and/or audio feature information of the code stream;
  • the determining sub-unit 222 is configured to determine, according to the image feature information and/or the audio feature information, whether the type of the code stream is a program stream.
  • the code stream includes a video code stream and an audio code stream.
  • the image characteristic information of the code stream is image feature information of the video code stream, and the image feature information includes a correlation between adjacent frames, an advertisement trademark information, and a switching frequency of the video picture.
  • the adjacent image frames in the video code stream can be analyzed to obtain correlation between adjacent frames in the video code stream, and the correlation between the adjacent frames can be used to determine the continuity of the current video frame.
  • sexuality the greater the correlation between adjacent frames, the more continuous the video picture, usually the picture continuity of the advertisement stream is lower than the picture continuity of the program stream, so the code stream can be judged according to the correlation of adjacent frames.
  • the program stream is still an advertisement stream.
  • the correlation of the adjacent frames is greater than or equal to a preset value, determining that the code stream is a program stream, and if the correlation of the adjacent frames is less than a preset value, determining that the code stream is an advertisement Streaming; the image of the image frame in the video stream can be extracted to extract the advertising trademark information in the image frame.
  • various advertising trademark information is pre-stored in the system, and is extracted in all image frames. If the advertisement trademark information is not available, the code stream may be determined to be a program stream. If the advertisement trademark information can be extracted from the image frame, the code stream may be a program stream or an advertisement stream; The picture switching frequency in the stream is analyzed to obtain the picture switching frequency in the video code stream.
  • the picture switching frequency of the advertisement stream is higher than the picture switching frequency of the program stream, so the code stream can be determined according to the switching frequency of the picture.
  • the program stream is also an advertisement stream. If the switching frequency of the screen is less than a preset value, the code stream is determined to be a program stream. If the switching frequency of the screen is greater than or equal to a preset value, the code stream is determined to be an advertisement stream. After determining the type of the code stream by the above method, it is finally determined whether the code stream is a program stream or an advertisement stream according to different weights of the respective methods.
  • the audio feature information of the code stream is audio feature information of the audio code stream
  • the audio feature may be a spectral feature of the audio code stream, which is obtained by pre-preserving the spectral features of the audio stream of various advertisements.
  • the spectral characteristics of the code stream are matched to the spectral characteristics of the pre-stored commercial audio stream to identify whether the audio stream is a program stream or an advertisement stream. Further, in order to determine the type of the code stream more accurately, after the image feature information and the audio feature information of the code stream are acquired, the acquired image feature information and audio characteristic information may be used to determine the Whether the code stream is a program stream.
  • the channel by detecting whether there is a content descriptor in the code stream, when there is a content descriptor in the code stream, determining, according to content in the content descriptor, whether the type of the code stream is a program stream, When there is no content descriptor in the code stream, it is determined whether the type of the code stream is a program stream according to the feature information of the code stream, so that the type of the code stream is accurately identified, and the channel is switched on time.
  • the marked channel provides the basis.
  • the channel switching device further includes: a receiving module 40 and an updating module 50.
  • the receiving module 40 is configured to receive a marking instruction triggered by a user based on a current channel
  • the determining module 20 is further configured to: when receiving the marking instruction, determine whether the channel corresponding to the marking instruction is the same as the marked channel;
  • the updating module 50 is configured to: if the channel corresponding to the marking instruction is different from the marked channel, update the marked channel by using a channel corresponding to the marking instruction.
  • the user may prefer to watch the video program of the current channel, the user will mark the current channel again, and the television receiver will judge the received mark when receiving the mark instruction. Whether the channel corresponding to the instruction is the same as the marked channel, to determine whether the marked channel needs to be updated, and if different, the marked channel is updated with the channel corresponding to the marking instruction, and saved, in the newly marked channel.
  • the user switches the channel to another channel again, and when it automatically returns to the marked channel in the future, it will automatically switch back to the newly marked channel without switching back to the previously marked channel.
  • the previous marked channel is channel 1
  • the switched channel is channel 2
  • the switched channel is the new marked channel
  • the channel after switching is channel 3
  • the current channel will be 3 Automatically switch back to the new tag channel 2 instead of switching back to channel 1.
  • the marked channel will be updated after the new channel is marked, and the updated marked channel is used as the new marked channel, so that the automatic switching is performed. Returning the channel of the new tag improves the user's viewing comfort.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • a storage medium such as ROM/RAM, disk
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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Abstract

本发明公开了一种频道切换方法，频道切换方法包括以下步骤：在电视机进行频道切换后，监控标记的频道所在频点的码流；判断所述码流的类型是否为节目流，其中，所述码流的类型包括节目流和广告流；若是，则将当前频道切换回标记的所述频道。本发明还公开了一种频道切换装置。本发明解决用户在原先的频道的广告播放完之后很难准时切换回原先频道继续观看节目的问题，提高了频道切换的准时性。

Description

频道切换方法及装置
技术领域
本发明涉及电视技术领域，尤其涉及一种频道切换方法及装置。
背景技术
随着智能电视的日益普及，对智能电视的智能化的功能也提出了新的要求。目前，电视节目在播放过程中常出现广告，并且随着商业化目的趋向越来越重，广告播放的时长越来越长。在当前频道正在播放广告时，用户通常会进行频道切换来避开广告时间，然而用户在频道切换后，对原先的频道便失去了任何信息，使得用户在原先的频道的广告播放完之后很难准时切换回原先频道继续观看节目，不能自动的根据节目信息进行频道切换。
发明内容
本发明的主要目的在于提供一种频道切换方法及装置，旨在解决不能自动的根据节目信息进行频道切换的问题。
为实现上述目的，本发明提供的一种频道切换方法，所述频道切换方法包括以下步骤：
在电视机进行频道切换后，监控标记的频道所在频点的码流；
判断所述码流的类型是否为节目流，其中，所述码流的类型包括节目流和广告流；
若是，则将当前频道切换回标记的所述频道。
可选地，所述在电视机进行频道切换后，监控标记的频道所在频点的码流的步骤之前，还包括：
接收用户基于当前频道触发的标记指令；
在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
若不相同，则采用所述标记指令对应的频道更新已标记的频道。
可选地，所述判断所述码流的类型是否为节目流的步骤包括：
检测所述码流中是否存在内容描述符；
在所述码流中存在所述内容描述符时，根据所述码流中的内容描述符判断所述码流的类型是否为节目流。
可选地，所述检测所述码流中是否存在内容描述符的步骤之后，还包括：
在所述码流中不存在所述内容描述符时，根据所述码流的特征信息判断所述码流的类型是否为节目流。
可选地，所述根据所述码流的特征信息判断所述码流的类型是否为节目流的步骤包括：
获取所述码流的图像特征信息和/或音频特征信息；
根据所述图像特征信息和/或所述音频特征信息判断所述码流的类型是否为节目流。
可选地，所述监控标记的频道所在频点的码流的步骤之前，所述频道切换方法还包括：
在电视机进行频道切换后，判断当前频道与标记的频道是否相同；
若不同，则执行所述监控标记的频道所在频点的码流的步骤。
此外，为实现上述目的，本发明还提供一种频道切换装置，所述频道切换装置包括：
监控模块，用于在电视机进行频道切换后，监控标记的频道所在频点的码流；
判断模块，用于判断所述码流的类型是否为节目流，其中，所述码流的类型包括节目流和广告流；
切换模块，用于若所述码流的类型为节目流，则将当前频道切换回标记的所述频道。
可选地，所述频道切换装置还包括：
接收模块，用于接收用户基于当前频道触发的标记指令；
所述判断模块，还用于在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
更新模块，用于若所述标记指令对应的频道与已标记的频道不相同，则采用所述标记指令对应的频道更新已标记的频道。
可选地，所述判断模块包括:
检测单元，用于检测所述码流中是否存在内容描述符；
判断单元，用于在所述码流中存在所述内容描述符时，根据所述码流中的内容描述符判断所述码流的类型是否为节目流。
可选地，所述判断单元，还用于在所述码流中不存在所述内容描述符时，根据所述码流的特征信息判断所述码流的类型是否为节目流；
可选地，所述判断单元包括：
获取子单元，用于获取所述码流的图像特征信息和/或音频特征信息；
判断子单元，用于根据所述图像特征信息和/或所述音频特征信息判断所述码流的类型是否为节目流。
可选地，所述判断模块，还用于在电视机进行频道切换后，判断当前频道与标记的频道是否相同；
所述监控模块，还用于监控标记的频道所在频点的码流。
本发明通过在电视机进行频道切换后实时或定时监控标记的频道所在频点的码流，从而判断所述码流类型是否为节目流，并在判断出所述码流类型为节目流时，触发返回指令，根据所述返回指令自动将当前频道切换回标记的所述频道，有效解决了不能自动的根据节目信息进行频道切换的问题，提高了频道切换的准时性。
附图说明
图1为本发明频道切换方法的第一实施例的流程示意图；
图2为图1中判断码流的类型是否为节目流的步骤细化流程示意图；
图3为图2中根据码流的特征信息判断码流的类型是否为节目流的步骤细化流程示意图；
图4为本发明频道切换方法的第二实施例的流程示意图；
图5为本发明频道切换方法的第三实施例的流程示意图；
图6为本发明频道切换装置的第一实施例的功能模块示意图；
图7为图6中判断模块的细化功能模块示意图；
图8为本发明频道切换装置的第二实施例的功能模块示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
基于上述问题，本发明提供一种频道切换方法。
参照图1，图1为本发明频道切换方法的第一实施例的流程示意图。
在本实施例中，所述频道切换方法包括：
步骤S10，在电视机进行频道切换后，监控标记的频道所在频点的码流；
在本实施例中，应用场景为具有两个高频头的电视接收机或者具有一个全频高频头的电视接收机。用户在观看视频节目时，如此时当前频道播放的节目内容为插播的广告，而用户不想观看该广告，会将当前频道切换至其他频道，但同时用户希望当前频道的广告播放完后能及时自动切换回当前频道继续观看当前频道的节目，则用户需要在将当前频道切换至其他频道之前对当前频道进行标记。具体的，在对当前频道进行标记时，可以通过按压遥控器上的具有频道标记功能的按键触发对当前频道的标记指令，或者通过按压电视接收机的按键面板提供的具有频道标记功能的按键触发对当前频道的标记指令。电视接收机在接收到用户触发的对当前频道的标记指令后，对当前频道进行标记，并保存标记的所述频道，以便后续自动切换回标记的所述频道。
当电视机进行频道切换后，监控标记的频道所在频点的码流。所述频道切换可以为一次频道切换，也可以为多次频道切换。当接收到频道切换指令时，对标记的频道所在频点的码流开始监控，直到当前频道切换回标记的频道为止。在本实施例中，对所述标记的频道所在频点的码流进行监控时存在两种方式。1）若电视接收机存在两个高频头，则所述电视接收机的其中一个高频头以标记的频道的频点为监控频点，对所述频点的码流进行实时或定时监控，另一个高频头负责接收切换频道后的频道的频点的码流，并将接收到的码流进行解复用、解码等一系列的操作，最终将处理后的码流传输至电视机的显示端口，以供电视机播放所述码流对应的电视节目。2）若电视接收机的高频头为全频高频头，则所述全频高频头实时或定时对标记的频道所在频点的码流进行监控，同时接收切换频道后的频道的频点的码流，并将接收到的码流进行解复用、解码等一系列的操作，最终将处理后的码流传输至电视机的显示端口，以供电视机播放所述码流对应的电视节目。
步骤S20，判断所述码流的类型是否为节目流，其中，所述码流的类型包括节目流和广告流；
通过对标记的频道对应的频点的码流进行实时或定时监控，从而判断所述码流的类型是否为节目流。在本实施例中，所述码流的类型包括节目流和广告流。所述节目流指的是所述码流对应的视频画面内容为视频节目，该视频节目包括电影，电视剧，综艺节目等，所述广告流指的是所述码流对应的视频画面内容为插播的广告。
步骤S30，若是，则将当前频道切换回标记的所述频道。
通过对标记的频道对应的频点的码流进行实时或定时监控，在确定标记的频道对应的频点的码流的类型为节目流时，将当前频道切换回标记的所述频道。具体的，在监控到所述码流为节目流时，触发一个频道返回指令，电视接收机在接收到该频道返回指令后，将当前频道切换回标记的所述频道。例如，在一实施例中，当接收到频道返回指令时，可以将监控标记的频道的高频头接收的码流进行解复用、解码等一系列的操作后，最终将处理后的码流传输至电视机的显示端口，以供电视机播放所述码流对应的电视节目，同时将另一个高频头停止工作，从而实现将当前频道切换回标记的所述频道；在本发明的另一实施例中，当接收到频道返回指令时，可以直接将全频高频头当前传输至电视机的显示端口的码流切换成标记的频道对应的频点的码流，以供电视机播放所述码流对应的电视节目，从而实现将当前频道切换回标记的所述频道。
本发明通过在频道切换后实时或定时监控标记的频道所在频点的码流，从而判断所述码流类型是否为节目流，并在判断出所述码流类型为节目流时，触发返回指令，根据所述返回指令自动将当前频道切换回标记的所述频道，有效解决了不能自动的根据节目信息进行频道切换的问题，提高了频道切换的准时性，提高了频道切换的准时性，进而使得用户获得更好的体验感。
进一步地，基于第一实施例提出本发明频道切换方法的第二实施例，参照图2，在本实施例中，所述步骤S20包括：
步骤S21，检测所述码流中是否存在内容描述符；
在判断所述码流的类型是否为节目流，可以通过检测所述码流中是否存在内容描述符的方式进行判断。具体的，对标记的频道所在频点的码流进行解复用，并获取解复用后的码流中的事件信息表。所述事件信息表按时间顺序提供每一个业务包含的事件信息，是对某一路节目的进一步描述，包含了与事件或节目相关的数据，例如事件或节目的名称、开始时间、持续时间、播放状态、是否加密、基本码流类型、节目类型、限定年龄级别等，分为present、following和schedule，分别包含当前事件和下一个事件的信息及在一个较长时间段内所安排的所有事件的信息。在获得所述事件信息表后，检测所述事件信息表中是否存在Content descriptor（内容描述符），所述内容描述符提供了节目的内容信息，包含有节目的类型、开始时间及持续时间。
步骤S22，在所述码流中存在所述内容描述符时，根据所述码流中的内容描述符判断所述码流的类型是否为节目流；
在检测到所述码流中存在内容描述符时，由于所述内容描述符中存在节目类型的描述，故根据所述内容描述符中的节目类型的描述可直接判断出所述码流的类型是节目流还是广告流。
步骤S23，在所述码流中不存在所述内容描述符时，根据所述码流的特征信息判断所述码流的类型是否为节目流。
当检测到所述码流中不存在内容描述符，则可以根据所述码流的特征信息判断所述码流的类型是否为节目流，所述码流的特征信息包括码流的图像特性信息及音频特征信息。
具体的，参照图3，所述根据所述码流的特征信息判断所述码流的类型是否为节目流的步骤包括：
步骤S231，获取所述码流的图像特征信息和/或音频特征信息；
步骤S232，根据所述图像特征信息和/或所述音频特征信息判断所述码流的类型是否为节目流。
在本实施例中，所述码流包括视频码流及音频码流。所述码流的图像特性信息为所述视频码流的图像特征信息，所述图像特征信息包括相邻帧之间的相关性，广告商标信息及视频画面的切换频率。具体的，可以通过对视频码流中相邻的图像帧进行分析，从而获得视频码流中相邻帧之间的相关性，通过相邻帧之间的相关性可以判断出当前视频画面的连续性，相邻帧之间的相关性越大，视频画面越连续，通常广告流的画面连续性低于节目流的画面连续性，故可根据相邻帧的相关性来判断所述码流是节目流还是广告流，若相邻帧的相关性大于或等于预设值，则判定所述码流为节目流，若相邻帧的相关性小于预设值，则判定所述码流为广告流；可以通过对视频码流中的图像帧进行特征提取，提取所述图像帧中的广告商标信息，需要说明的是，系统中预存有各种广告商标信息，若所有的图像帧中都提取不到广告商标信息，则可确定所述码流为节目流，若从图像帧中能提取到广告商标信息，则所述码流可能为节目流，也可能为广告流；可以通过对视频码流中的画面切换频率进行分析，从而获得视频码流中的画面切换频率，通常广告流的画面切换频率高于节目流的画面切换频率，故可根据画面的切换频率来判定所述码流是节目流还是广告流，若画面的切换频率小于预设值，则判断所述码流为节目流，若画面的切换频率大于或等于预设值，则判定所述码流为广告流。通过上述方法判定出码流的类型后，根据各个方法的不同权重从而最终判断出所述码流是节目流还是广告流。所述码流的音频特征信息为所述音频码流的音频特征信息，该音频特征可以为所述音频码流的频谱特征，通过预先存有各种广告的音频码流的频谱特征，将获得的所述码流的频谱特征与预存的广告音频码流的频谱特征进行匹配从而识别出所述音频码流是节目流还是广告流。进一步地，为了更准确的判断出所述码流的类型，可以在获取到所述码流的图像特征信息及音频特征信息后，结合获取的所述图像特征信息及音频特性信息来判断所述码流是否为节目流。
本实施例通过检测所述码流中是否存在内容描述符，在所述码流中存在内容描述符时，根据所述内容描述符中的内容判断所述码流的类型是否为节目流，在所述码流中不存在内容描述符时，根据所述码流的特征信息判断所述码流的类型是否为节目流，从而准确的识别出所述码流的类型，为频道的准时切换回标记的频道提供了基础。
进一步地，基于上述第一或第二实施例提出本发明频道切换方法的第三实施例，参照图4，在本实施例中，所述监控标记的频道所在频点的码流的步骤之前，所述频道切换方法还包括：
步骤S40，在电视机进行频道切换后，判断当前频道与标记的频道是否相同；
若当前频道与标记的频道不同，则执行步骤S10，即监控标记的频道所在频点的码流。
在电视机进行频道切换后，用户可能在切换了多个频道后又将频道切换回了标记的频道，此时为了节约能耗，可以停止对标记的频道所在频点的码流进行监控，因此，为了节约能耗，可以在电视机进行频道切换后，判断当前频道与标记的所述频道是否相同，在当前频道与标记的所述频道相同时，直接停止对标记的频道所在频点的码流的监控，在当前频道与标记的所述频道不同时，对标记的所述频道所在频点的码流进行监控。
本实施例通过对切换后的频道与标记的频道进行比较，当切换后的频道与标记的频道相同时，停止对标记的频道所在频点的码流进行监控，从而降低了设备的功耗。
进一步地，基于上述任一实施例提出本发明频道切换方法的第四实施例，参照图5，在本实施例中，所述步骤S10之前，还包括：
步骤S50，接收用户基于当前频道触发的标记指令；
步骤S60，在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
步骤S70，若不相同，则采用所述标记指令对应的频道更新已标记的频道。
当用户将标记的频道切换到其他频道后，用户可能更喜欢观看当前频道的视频节目，则用户会再次对当前频道进行标记，电视接收机在接收到该标记指令时，会判断接收到的标记指令对应的频道与已标记的频道是否相同，以确定是否需要更新已标记的频道，若不同，则会采用所述标记指令对应的频道更新已标记的频道，并保存，在该新标记的频道播放广告时，用户将该频道又切换至其他频道，在以后的自动返回标记的频道时，会自动切换回新标记的频道，而不会切换回以前标记的频道。例如，以前的标记频道为频道1，切换后的频道为频道2，该切换后的频道为新的标记频道，再次切换后的频道为频道3，若接收到频道返回指令，则将从当前频道3自动切换回新的标记频道2，而不是切换回频道1。
本实施例通过在对一个频道进行标记后再次标记一个新的频道，在标记新的频道后将更新标记频道，把更新的标记频道作为新的标记的所述频道，从而使得在自动返回时切换回该新的标记的所述频道，提高了用户的观看舒适度。
本发明进一步提供一种频道切换装置。
参照图6，图6为本发明频道切换装置的第一实施例的功能模块示意图。
在本实施例中，所述频道切换装置包括：监控模块10、判断模块20及切换模块30。
所述监控模块10，用于在电视机进行频道切换后，监控标记的频道所在频点的码流；
在本实施例中，应用场景为具有两个高频头的电视接收机或者具有一个全频高频头的电视接收机。用户在观看视频节目时，如此时当前频道播放的节目内容为插播的广告，而用户不想观看该广告，会将当前频道切换至其他频道，但同时用户希望当前频道的广告播放完后能及时自动切换回当前频道继续观看当前频道的节目，则用户需要在将当前频道切换至其他频道之前对当前频道进行标记。具体的，在对当前频道进行标记时，可以通过按压遥控器上的具有频道标记功能的按键触发对当前频道的标记指令，或者通过按压电视接收机的按键面板提供的具有频道标记功能的按键触发对当前频道的标记指令。电视接收机在接收到用户触发的对当前频道的标记指令后，对当前频道进行标记，并保存标记的所述频道，以便后续自动切换回标记的所述频道。
当电视机进行频道切换后，监控标记的频道所在频点的码流。所述频道切换可以为一次频道切换，也可以为多次频道切换。当接收到频道切换指令时，对标记的频道所在频点的码流开始监控，直到当前频道切换回标记的频道为止。在本实施例中，对所述标记的频道所在频点的码流进行监控时存在两种方式。1）若电视接收机存在两个高频头，则所述电视接收机的其中一个高频头以标记的频道的频点为监控频点，对所述频点的码流进行实时或定时监控，另一个高频头负责接收切换频道后的频道的频点的码流，并将接收到的码流进行解复用、解码等一系列的操作，最终将处理后的码流传输至电视机的显示端口，以供电视机播放所述码流对应的电视节目。2）若电视接收机的高频头为全频高频头，则所述全频高频头实时或定时对标记的频道所在频点的码流进行监控，同时接收切换频道后的频道的频点的码流，并将接收到的码流进行解复用、解码等一系列的操作，最终将处理后的码流传输至电视机的显示端口，以供电视机播放所述码流对应的电视节目。
所述判断模块20，用于判断所述码流的类型是否为节目流，其中，所述码流的类型包括节目流和广告流；
通过对标记的频道对应的频点的码流进行实时或定时监控，从而判断所述码流的类型是否为节目流。在本实施例中，所述码流的类型包括节目流和广告流。所述节目流指的是所述码流对应的视频画面内容为视频节目，该视频节目包括电影，电视剧，综艺节目等，所述广告流指的是所述码流对应的视频画面内容为插播的广告。
进一步地，所述判断模块20，还用于在电视机进行频道切换后，判断当前频道与标记的频道是否相同；
所述监控模块10，还用于监控标记的频道所在频点的码流。
在电视机进行频道切换后，用户可能在切换了多个频道后又将频道切换回了标记的频道，此时为了节约能耗，可以停止对标记的频道所在频点的码流进行监控，因此，为了节约能耗，可以在电视机进行频道切换后，判断当前频道与标记的所述频道是否相同，在当前频道与标记的所述频道相同时，直接停止对标记的频道所在频点的码流的监控，在当前频道与标记的所述频道不同时，继续对标记的所述频道所在频点的码流进行监控。
所述切换模块30，用于若所述码流的类型为节目流，则将当前频道切换回标记的所述频道。
通过对标记的频道对应的频点的码流进行实时或定时监控，在确定标记的频道对应的频点的码流的类型为节目流时，将当前频道切换回标记的所述频道。具体的，在监控到所述码流为节目流时，触发一个频道返回指令，电视接收机在接收到该频道返回指令后，将当前频道切换回标记的所述频道。例如，在一实施例中，当接收到频道返回指令时，可以将监控标记的频道的高频头接收的码流进行解复用、解码等一系列的操作后，最终将处理后的码流传输至电视机的显示端口，以供电视机播放所述码流对应的电视节目，同时将另一个高频头停止工作，从而实现将当前频道切换回标记的所述频道；在本发明的另一实施例中，当接收到频道返回指令时，可以直接将全频高频头当前传输至电视机的显示端口的码流切换成标记的频道对应的频点的码流，以供电视机播放所述码流对应的电视节目，从而实现将当前频道切换回标记的所述频道。
本发明通过在频道切换后实时或定时监控标记的频道所在频点的码流，从而判断所述码流类型是否为节目流，并在判断出所述码流类型为节目流时，触发返回指令，根据所述返回指令自动将当前频道切换回标记的所述频道，有效解决了不能自动的根据节目信息进行频道切换的问题，提高了频道切换的准时性，提高了频道切换的准时性，进而使得用户获得更好的体验感。
进一步地，基于第一实施例提出本发明频道切换装置的第二实施例，参照图7，在本实施例中，所述判断模块20包括：检测单元21及判断单元22。
所述检测单元21，用于检测所述码流中是否存在内容描述符；
在判断所述码流的类型是否为节目流，可以通过检测所述码流中是否存在内容描述符的方式进行判断。具体的，对标记的频道所在频点的码流进行解复用，并获取解复用后的码流中的事件信息表。所述事件信息表按时间顺序提供每一个业务包含的事件信息，是对某一路节目的进一步描述，包含了与事件或节目相关的数据，例如事件或节目的名称、开始时间、持续时间、播放状态、是否加密、基本码流类型、节目类型、限定年龄级别等，分为present、following和schedule，分别包含当前事件和下一个事件的信息及在一个较长时间段内所安排的所有事件的信息。在获得所述事件信息表后，检测所述事件信息表中是否存在Content descriptor（内容描述符），所述内容描述符提供了节目的内容信息，包含有节目的类型、开始时间及持续时间。
所述判断单元22，用于在所述码流中存在所述内容描述符时，根据所述码流中的内容描述符判断所述码流的类型是否为节目流；
在检测到所述码流中存在内容描述符时，由于所述内容描述符中存在节目类型的描述，故根据所述内容描述符中的节目类型的描述可直接判断出所述码流的类型是节目流还是广告流。
所述判断单元22，还用于在所述码流中不存在所述内容描述符时，根据所述码流的特征信息判断所述码流的类型是否为节目流。
当检测到所述码流中不存在内容描述符，则可以根据所述码流的特征信息判断所述码流的类型是否为节目流，所述码流的特征信息包括码流的图像特性信息及音频特征信息。具体的，参照图7，所述判断单元22包括获取子单元221及判断子单元222。
所述获取子单元221，用于获取所述码流的图像特征信息和/或音频特征信息；
所述判断子单元222，用于根据所述图像特征信息和/或所述音频特征信息判断所述码流的类型是否为节目流。
在本实施例中，所述码流包括视频码流及音频码流。所述码流的图像特性信息为所述视频码流的图像特征信息，所述图像特征信息包括相邻帧之间的相关性，广告商标信息及视频画面的切换频率。具体的，可以通过对视频码流中相邻的图像帧进行分析，从而获得视频码流中相邻帧之间的相关性，通过相邻帧之间的相关性可以判断出当前视频画面的连续性，相邻帧之间的相关性越大，视频画面越连续，通常广告流的画面连续性低于节目流的画面连续性，故可根据相邻帧的相关性来判断所述码流是节目流还是广告流，若相邻帧的相关性大于或等于预设值，则判定所述码流为节目流，若相邻帧的相关性小于预设值，则判定所述码流为广告流；可以通过对视频码流中的图像帧进行特征提取，提取所述图像帧中的广告商标信息，需要说明的是，系统中预存有各种广告商标信息，若所有的图像帧中都提取不到广告商标信息，则可确定所述码流为节目流，若从图像帧中能提取到广告商标信息，则所述码流可能为节目流，也可能为广告流；可以通过对视频码流中的画面切换频率进行分析，从而获得视频码流中的画面切换频率，通常广告流的画面切换频率高于节目流的画面切换频率，故可根据画面的切换频率来判定所述码流是节目流还是广告流，若画面的切换频率小于预设值，则判断所述码流为节目流，若画面的切换频率大于或等于预设值，则判定所述码流为广告流。通过上述方法判定出码流的类型后，根据各个方法的不同权重从而最终判断出所述码流是节目流还是广告流。所述码流的音频特征信息为所述音频码流的音频特征信息，该音频特征可以为所述音频码流的频谱特征，通过预先存有各种广告的音频码流的频谱特征，将获得的所述码流的频谱特征与预存的广告音频码流的频谱特征进行匹配从而识别出所述音频码流是节目流还是广告流。进一步地，为了更准确的判断出所述码流的类型，可以在获取到所述码流的图像特征信息及音频特征信息后，结合获取的所述图像特征信息及音频特性信息来判断所述码流是否为节目流。
本实施例通过检测所述码流中是否存在内容描述符，在所述码流中存在内容描述符时，根据所述内容描述符中的内容判断所述码流的类型是否为节目流，在所述码流中不存在内容描述符时，根据所述码流的特征信息判断所述码流的类型是否为节目流，从而准确的识别出所述码流的类型，为频道的准时切换回标记的频道提供了基础。
进一步地，基于上述任一实施例提出本发明频道切换装置的第三实施例，参照图8，在本实施例中，所述频道切换装置还包括：接收模块40及更新模块50。
所述接收模块40，用于接收用户基于当前频道触发的标记指令；
所述判断模块20，还用于在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
所述更新模块50，用于若所述标记指令对应的频道与已标记的频道不相同，则采用所述标记指令对应的频道更新已标记的频道。
当用户将标记的频道切换到其他频道后，用户可能更喜欢观看当前频道的视频节目，则用户会再次对当前频道进行标记，电视接收机在接收到该标记指令时，会判断接收到的标记指令对应的频道与已标记的频道是否相同，以确定是否需要更新已标记的频道，若不同，则会采用所述标记指令对应的频道更新已标记的频道，并保存，在该新标记的频道播放广告时，用户将该频道又切换至其他频道，在以后的自动返回标记的频道时，会自动切换回新标记的频道，而不会切换回以前标记的频道。例如，以前的标记频道为频道1，切换后的频道为频道2，该切换后的频道为新的标记频道，再次切换后的频道为频道3，若接收到频道返回指令，则将从当前频道3自动切换回新的标记频道2，而不是切换回频道1。
本实施例通过在对一个频道进行标记后再次标记一个新的频道，在标记新的频道后将更新标记频道，把更新的标记频道作为新的标记的所述频道，从而使得在自动返回时切换回该新的标记的所述频道，提高了用户的观看舒适度。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质（如ROM/RAM、磁碟、光盘）中，包括若干指令用以使得一台终端设备（可以是手机，计算机，服务器，空调器，或者网络设备等）执行本发明各个实施例所述的方法。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种频道切换方法，其特征在于，所述频道切换方法包括以下步骤：
    在电视机进行频道切换后，监控标记的频道所在频点的码流；
    判断所述码流的类型是否为节目流，其中，所述码流的类型包括节目流和广告流；
    若是，则将当前频道切换回标记的所述频道。
  2. 如权利要求1所述的频道切换方法，其特征在于，所述在电视机进行频道切换后，监控标记的频道所在频点的码流的步骤之前，还包括：
    接收用户基于当前频道触发的标记指令；
    在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    若不相同，则采用所述标记指令对应的频道更新已标记的频道。
  3. 如权利要求1所述的频道切换方法，其特征在于，所述判断所述码流的类型是否为节目流的步骤包括：
    检测所述码流中是否存在内容描述符；
    在所述码流中存在所述内容描述符时，根据所述码流中的内容描述符判断所述码流的类型是否为节目流。
  4. 如权利要求3所述的频道切换方法，其特征在于，所述在电视机进行频道切换后，监控标记的频道所在频点的码流的步骤之前，还包括：
    接收用户基于当前频道触发的标记指令；
    在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    若不相同，则采用所述标记指令对应的频道更新已标记的频道。
  5. 如权利要求3所述的频道切换方法，其特征在于，所述检测所述码流中是否存在内容描述符的步骤之后，还包括：
    在所述码流中不存在所述内容描述符时，根据所述码流的特征信息判断所述码流的类型是否为节目流。
  6. 如权利要求5所述的频道切换方法，其特征在于，所述在电视机进行频道切换后，监控标记的频道所在频点的码流的步骤之前，还包括：
    接收用户基于当前频道触发的标记指令；
    在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    若不相同，则采用所述标记指令对应的频道更新已标记的频道。
  7. 如权利要求5所述的频道切换方法，其特征在于，所述根据所述码流的特征信息判断所述码流的类型是否为节目流的步骤包括：
    获取所述码流的图像特征信息和/或音频特征信息；
    根据所述图像特征信息和/或所述音频特征信息判断所述码流的类型是否为节目流。
  8. 如权利要求7所述的频道切换方法，其特征在于，所述在电视机进行频道切换后，监控标记的频道所在频点的码流的步骤之前，还包括：
    接收用户基于当前频道触发的标记指令；
    在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    若不相同，则采用所述标记指令对应的频道更新已标记的频道。
  9. 如权利要求1所述的频道切换方法，其特征在于，所述监控标记的频道所在频点的码流的步骤之前，所述频道切换方法还包括：
    在电视机进行频道切换后，判断当前频道与标记的频道是否相同；
    若不同，则执行所述监控标记的频道所在频点的码流的步骤。
  10. 如权利要求9所述的频道切换方法，其特征在于，所述在电视机进行频道切换后，监控标记的频道所在频点的码流的步骤之前，还包括：
    接收用户基于当前频道触发的标记指令；
    在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    若不相同，则采用所述标记指令对应的频道更新已标记的频道。
  11. 一种频道切换装置，其特征在于，所述频道切换装置包括：
    监控模块，用于在电视机进行频道切换后，监控标记的频道所在频点的码流；
    判断模块，用于判断所述码流的类型是否为节目流，其中，所述码流的类型包括节目流和广告流；
    切换模块，用于若所述码流的类型为节目流，则将当前频道切换回标记的所述频道。
  12. 如权利要求11所述的频道切换装置，其特征在于，所述频道切换装置还包括：
    接收模块，用于接收用户基于当前频道触发的标记指令；
    所述判断模块，还用于在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    更新模块，用于若所述标记指令对应的频道与已标记的频道不相同，则采用所述标记指令对应的频道更新已标记的频道。
  13. 如权利要求11所述的频道切换装置，其特征在于，所述判断模块包括:
    检测单元，用于检测所述码流中是否存在内容描述符；
    判断单元，用于在所述码流中存在所述内容描述符时，根据所述码流中的内容描述符判断所述码流的类型是否为节目流。
  14. 如权利要求13所述的频道切换装置，其特征在于，所述频道切换装置还包括：
    接收模块，用于接收用户基于当前频道触发的标记指令；
    所述判断模块，还用于在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    更新模块，用于若所述标记指令对应的频道与已标记的频道不相同，则采用所述标记指令对应的频道更新已标记的频道。
  15. 如权利要求13所述的频道切换装置，其特征在于，所述判断单元，还用于在所述码流中不存在所述内容描述符时，根据所述码流的特征信息判断所述码流的类型是否为节目流。
  16. 如权利要求15所述的频道切换装置，其特征在于，所述频道切换装置还包括：
    接收模块，用于接收用户基于当前频道触发的标记指令；
    所述判断模块，还用于在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    更新模块，用于若所述标记指令对应的频道与已标记的频道不相同，则采用所述标记指令对应的频道更新已标记的频道。
  17. 如权利要求15所述的频道切换装置，其特征在于，所述判断单元包括：
    获取子单元，用于获取所述码流的图像特征信息和/或音频特征信息；
    判断子单元，用于根据所述图像特征信息和/或所述音频特征信息判断所述码流的类型是否为节目流。
  18. 如权利要求17所述的频道切换装置，其特征在于，所述频道切换装置还包括：
    接收模块，用于接收用户基于当前频道触发的标记指令；
    所述判断模块，还用于在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    更新模块，用于若所述标记指令对应的频道与已标记的频道不相同，则采用所述标记指令对应的频道更新已标记的频道。
  19. 如权利要求11所述的频道切换装置，其特征在于，所述判断模块，还用于在电视机进行频道切换后，判断当前频道与标记的频道是否相同；
    所述监控模块，还用于监控标记的频道所在频点的码流。
  20. 如权利要求19所述的频道切换装置，其特征在于，所述频道切换装置还包括：
    接收模块，用于接收用户基于当前频道触发的标记指令；
    所述判断模块，还用于在接收到所述标记指令时，判断所述标记指令对应的频道与已标记的频道是否相同；
    更新模块，用于若所述标记指令对应的频道与已标记的频道不相同，则采用所述标记指令对应的频道更新已标记的频道。
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