WO2010015168A1 - 电视节目导航方法、装置和系统 - Google Patents
电视节目导航方法、装置和系统 Download PDFInfo
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- WO2010015168A1 WO2010015168A1 PCT/CN2009/072828 CN2009072828W WO2010015168A1 WO 2010015168 A1 WO2010015168 A1 WO 2010015168A1 CN 2009072828 W CN2009072828 W CN 2009072828W WO 2010015168 A1 WO2010015168 A1 WO 2010015168A1
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- key frame
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Classifications
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- 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
- H04N21/47—End-user applications
- H04N21/482—End-user interface for program selection
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- 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
- H04N21/41265—The peripheral being portable, e.g. PDAs or mobile phones having a remote control device for bidirectional communication between the remote control device and client device
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
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- 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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
Definitions
- the present invention relates to the field of digital television technologies, and in particular, to a television program navigation method, apparatus and system. Background technique
- an IPTV (Internet Protocol Television) operator provides an Electronic Program Guide (EPG) to facilitate users to browse programs to find programs of interest.
- EPG is a relatively real-time program listing used on television.
- the EPG provider stores the EPG on the EPG server, and the user downloads the EPG to the set-top box or the terminal device of the television through the Internet (INTERNET) or the telephone line, so that the terminal device can display the received EPG, and the user can call the terminal device.
- the EPG looks at the broadcast time and broadcast channel of the program that it is interested in.
- the prior art solution receives digital broadcast data on a plurality of channels; and simultaneously outputs real-time broadcast data of the selected one channel and a still image of the remaining channels on a single screen; simultaneously receiving on one main channel and at least one sub-channel Digital broadcast data.
- the inventors of the present invention found that because the terminal needs to simultaneously receive the broadcast data of the set multiple channels, it will occupy a large bandwidth, and the bandwidth occupied by the subchannel affects the main channel data. Receiving; When such a terminal is used by a wide range of user terminals, a large amount of access network bandwidth is used to receive subchannel data that is not actually displayed. In order to implement the method of simultaneously displaying a multi-channel visible image as described in the prior art, the current set top box needs to be increased in complexity by adding a larger number of buffers and processing modules.
- Embodiments of the present invention provide a television program navigation method, apparatus, and system.
- a television program navigation method includes:
- the channel key frame included in the channel key frame information is sent, so that the terminal displays the channel key frame on the display device.
- a channel key frame display method includes:
- One or more channel key frames are sent to the display device for display according to the settings.
- a television program navigation system comprising:
- a key frame acquiring device configured to monitor a live channel that needs to extract a key frame, periodically extract key frame information according to the configuration, and send the extracted key frame information;
- the key frame holding device is configured to save the received key frame information, receive a key frame request message sent by the terminal, and send the key frame information according to the request message.
- a key frame acquisition device includes:
- a key frame information acquiring unit configured to monitor a live channel that needs to extract a key frame, and extract key frame information according to a configuration period;
- a sending unit configured to send the extracted key frame information.
- a key frame saving device includes:
- a receiving unit configured to receive key frame information sent by the key frame acquiring device and a key frame request message sent by the terminal;
- a saving unit configured to save key frame information sent by the key frame acquiring device
- a sending unit configured to send a key frame message returned to the terminal.
- a video terminal comprising:
- a sending unit configured to send a key frame request message
- a receiving unit configured to receive a video signal and a key frame message returned according to the key frame request message; and a processing unit, configured to decode the video and the key frame, and superimpose the decoded one or more key frames and the live program picture.
- the program may be stored in a computer readable storage medium, and the storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.
- the channel key frame is extracted and the channel key frame is displayed for navigating the television program, and the terminal does not need to simultaneously access one or more non-view channel interception video data, and the television channel navigation is required when using the present invention.
- the bandwidth requirement is small; the embodiment of the present invention only needs to be added to the key frame extraction and storage device, and the terminal has small changes and low computing power requirements.
- FIG. 1 is a flowchart of a television program navigation method according to a first embodiment of the present invention
- FIG. 2 is a structural diagram of a television program navigation system according to a second embodiment of the present invention.
- FIG. 3 is a structural diagram of a key frame acquiring apparatus according to a third embodiment of the present invention.
- FIG. 4 is a structural diagram of a key frame saving apparatus according to a fourth embodiment of the present invention.
- FIG. 5 is a structural diagram of a video terminal according to a fifth embodiment of the present invention.
- the embodiment of the invention provides a television program navigation method, which solves the problem that the terminal simultaneously receives the broadcast data of the set multiple channels for display and navigation, which occupies a large bandwidth.
- Embodiments of the present invention also provide corresponding apparatus and systems. The details are described below separately.
- a television program navigation method comprising:
- the live channel that needs to extract the key frame is monitored, and the key frame of the live program is periodically intercepted according to the pre-configuration and the key frame interception time is recorded; after the key frame is obtained, the key frame may be zoomed. To save storage resources and facilitate display.
- the current key frame information is associated with the program title, so that the correspondence between the current channel key frame and the EPG information can be better provided, so as to facilitate the user's current key frame. It was intercepted in the exact program of the channel.
- the channel key frame is sent, so that the terminal displays on the display device The channel key frame is shown.
- a channel key frame display method includes:
- One or more channel key frames are sent to the display device for display according to the settings.
- the key frame When the channel key frame is displayed on the display device, according to the setting, the key frame may be displayed on the suspended live channel program, thereby reducing the processing workload of the display device; or the channel key may be directly displayed without suspending the live channel. frame.
- FIG. 1 is a flowchart of a method for navigating a television program according to a first embodiment of the present invention.
- an IPTV is taken as an example.
- Step 101 The key frame acquiring device acquires channel key frame information.
- the key frame acquisition device acquires channel key frames, corresponding channel information, and key frame interception time information as channel key frame information.
- the key frame acquiring device can access the head end encoder and intercept key frame data of the live channel; if the key frame acquiring device intercepts the key frame before the live signal is encoded, no additional decoding operation is required; and if the header encoding is performed at the head end After the live signal is encoded and the key frame data is intercepted, the intercepted code stream needs to be decoded to intercept the key frame; in actual implementation, the key frame acquisition device encodes the live data before the head end encoder is encoded. After encoding the live data and intercepting the key frame data, the headend encoder needs to be upgraded, and the software and hardware interfaces of the headend encoder are added, so that the encoder can be connected with the key frame acquiring device. In this embodiment, the key frame acquiring device adopts a method of intercepting key frames before the head end encoder encodes the live data, so as to reduce the decoding process and obtain a more real-time processing effect.
- the live data stream can be read from the encoder.
- the key frame acquiring device copies one frame of data from the encoder frame buffer, performs static image compression encoding, reduces the amount of key frame data, and records the time for performing this operation.
- a key frame acquisition device can simultaneously acquire key frame data from one or more encoders. Because a headend encoder corresponds to a live channel, a key frame acquisition device can simultaneously capture key frames for multiple live channels; setting the key frame acquisition device so that the key frame acquisition device can continuously extract according to the set period
- the channel key frame can also be set to scale according to a certain size or scale before intercepting the key frame for static image compression coding.
- Step 102 The key frame acquiring device sends a channel key frame message to the key frame holding device.
- the key frame acquiring device sends the acquired channel key frame information to the key frame holding device, wherein the channel key frame information includes a channel key frame, corresponding channel information, and key frame intercepting time information; after the key frame saving device receives the key frame, Saving the key frame and its correspondence with the channel. If the key frame of the corresponding channel has been saved, the newly received key frame information is overwritten with the old key frame information; if the key frame of the channel is received for the first time, The channel allocates a storage area in the memory, creates a channel key frame record, and saves the key frame and channel correspondence information.
- the channel key frame information includes a channel key frame, corresponding channel information, and key frame intercepting time information
- the key frame storage device can also be deployed on the same server as the key frame acquisition device as different functional modules of the server, so that the key frame acquisition device can intercept the key frame information and then transfer the data through the module interface between them.
- the EPG server may also provide EPG information to the key frame holding device, and the key frame saving device adds the current key frame information according to the correspondence between the channel, the program, and the interception time of the EPG information and the interception time of the currently intercepted key frame. The title of the program is associated.
- the key frame storage device may also be a stand-alone server, and the intercepted key frames and related information are stored in the random access memory, so that the terminal request can be quickly responded; the key frame data and related information can also be saved in the server. Loss of memory, such as hard disk, saves server resources.
- the key frame storage device can also be set inside the EPG server, and the key frame acquisition device can be directly connected to the EPG server.
- the key frames acquired by the key frame acquisition device can be directly sent to the EPG server through the internal network of the IPTV system, and the EPG server will receive the
- the key frame data and related information are forwarded to the internal module key frame storage device, and the latter processes and saves the key frame data and related information; in this deployment mode, the function of the key frame storage device is embodied as a new function of the EPG server. .
- Step 103 The key frame holding device saves the channel key frame.
- the key frame saving device After obtaining the EPG information from the EPG server, the key frame saving device queries the channel program list corresponding to the currently processed key frame in the EPG, and then determines which program of the channel belongs to the key frame according to the intercept time of the key frame; The correspondence is saved together in the channel keyframe record.
- the channel keyframe record contains at least the following information: Parameter name Parameter type Parameter value
- the channel tag string such as: Channel (Channel) 001 knowledge
- Step 104 The terminal sends a key frame request message.
- the terminal receives the operation of the user, and generates a request message requesting the server to send the key frame of the requested live channel program; for the server side to respond faster, optionally, the terminal may select or default according to the user's operation, correspondingly, requesting the user Specifying a key frame of one or more channels near the channel or a key frame requesting several channels adjacent to the current viewing channel by default; the terminal sends the generated request to the key frame holding device, if the key frame holding device is separately deployed, the key frame
- the saving device receives and processes the request sent by the terminal. The detailed process is described as follows:
- the remote controller can be operated, for example, by the following steps:
- the user sends a command to the terminal by using a control device, such as a remote controller; after receiving the command, the terminal displays a corresponding "channel switching navigation" menu option according to the configuration indication display device (such as a television); for example, the "channel switching navigation" menu option
- a control device such as a remote controller
- the terminal displays a corresponding "channel switching navigation" menu option according to the configuration indication display device (such as a television); for example, the "channel switching navigation” menu option
- the configuration indication display device such as a television
- the terminal After the user selects an option, the terminal generates a key frame request message according to the user selection; the request message includes at least the following information:
- This identifier indicates to the message recipient (in this embodiment, it is: EPG server) This message is the request channel key frame
- the message destination String key frame holds the IP address of the network element where the device is located.
- This embodiment is an EPG server where the key frame storage device is located. IP address;
- Channel identification column List ⁇ channel identification> list form gives the message request to get the table corresponding to the key frame of which channel
- the user can select a browsing mode, for example: “Browse from the beginning” indicates that the user wants to start browsing from the first channel pre-stored in the terminal, and in the request message generated by the terminal, the first channel identifier in the channel identification list is The first channel identifier pre-stored in the terminal, the second channel identifier is the second channel identifier saved by the terminal, and so on; "Browsing from the current channel” indicates that the user wants to browse forward from the channel currently being watched.
- the first channel identifier in the channel identifier list is the previous channel identifier of the currently played channel pre-stored in the terminal
- the second channel identifier is the second previous channel of the current broadcast channel saved by the terminal.
- Channel identification and so on; "Browsing from the current channel” indicates that the user wants to browse backwards from the channel currently being watched.
- the first channel identifier in the channel identification list is the terminal.
- Pre-stored channel identification of the current playing channel the second channel identifier is saved by the terminal After playing in front of the second channel of the channel identification, and so on.
- Random browsing means that the user wants to randomly view the program of any number of channels.
- the terminal can randomly select several channel identifiers to join the request message and request the corresponding key frame. This way can be set as the mode in which the terminal requests the key frame silently. .
- the corresponding network element receives the request and processes the request in the key frame holding device. For example, when the key frame holding device is in the EPG server, the EPG server receives the request message sent by the terminal, and when determining that the message type is "key frame request message", forwards the message to the key frame holding device.
- Step 105 The key frame saving device sends the key frame information according to the key frame request message.
- the key frame holding device selects the saved key frame information according to the received key frame request message, and sends the selected key frame information to the terminal.
- the key frame saving device searches for the corresponding channel key frame record from the memory according to the channel identification list in the request message, and then acquires the key frame data and the corresponding program identification information, and packages the key frame return information.
- the key frame return message includes at least the following content:
- the sender IP address in this embodiment, the EPG server IP address.
- the key frame information List contains ⁇ channel identification, program identification, key frame label list> triplet information
- Step 106 The terminal displays the key frame according to the key frame information.
- the terminal After receiving the key frame return message, the terminal parses the key frame message, decodes the key frame, and sends the decoded key frame to the display device for display; when the key frame is displayed, the current channel live program screen may be paused, and then the key frame is displayed. Displayed on the device, the key frame and the picture being played can be superimposed to display the key frame on the picture being played; the display interface can display multiple channel key frames at a time, and arranged in a certain matrix form. For example, each page displays (2 rows x 3 columns) 6 key frames; in order to reduce the interaction between the terminal and the server and ensure that the key frames seen by the user are up-to-date, one request can request multiple key frames, which can be one screen display key frame.
- the key frame request message requests the latest channel key frame intercepted by the server side, and the newly generated The channel identification requested in the request message can be incremented or decremented based on the last requested channel identification.
- the terminal can time the user's operation. If the user stays in the navigation interface for too long, and does not perform channel switching, such as: short-term departure, when the user returns to the operation, the terminal will depend on whether the user leaves the time or not.
- the threshold is set to re-initiate a keyframe request to ensure that the keyframes viewed by the user are up to date. It is also possible for the user to initiate such a refresh operation by providing a refresh button in a certain place (for example, below) in the key frame display interface.
- the terminal acquires the access URL of the channel from the EPG or the key frame information according to the channel key frame selected by the user, After the normal channel switching is performed; if the key frame return information includes the channel access URL, the key frame is selected for channel switching, and the EPG server does not need to find the channel access URL.
- the channel key frame is extracted and the channel key frame is displayed for navigating the television program, and the terminal does not need to simultaneously access one or more non-view channel interception video data, and uses the present invention to perform television channel navigation.
- the bandwidth requirement is small; it only needs to be added to the key frame extraction and storage device, and the terminal has small changes and low computing power requirements.
- the key frame acquiring device 201 is configured to monitor a live channel that needs to extract a key frame, extract key frame information according to a configuration period, and send the extracted key frame information.
- the key frame acquiring device may access the head end encoder and intercept key frame data of the live channel; if the key frame acquiring device intercepts the key frame before the live signal is encoded, no additional decoding operation is required; After the header encoder encodes the live signal and intercepts the key frame data, the intercepted code stream needs to be decoded to intercept the key frame; in actual implementation, the key frame acquisition device encodes the live data before the head end encoder encodes the live data. Or the headend encoder encodes the live data and intercepts the key frame data, and needs to upgrade the headend encoder to increase the hardware and software interface of the headend encoder, so that the encoder can be connected with the key frame acquisition device. In this embodiment, the key frame acquiring device uses a method of intercepting key frames before the head end encoder encodes the live data, so as to reduce the decoding process and obtain a more real-time processing effect.
- the live data stream can be read from the encoder.
- the key frame acquiring device copies one frame of data from the encoder frame buffer, performs static image compression encoding, reduces the amount of key frame data, and records the time for performing this operation.
- a key frame acquisition device can simultaneously acquire key frame data from one or more encoders. Because a headend encoder corresponds to a live channel, a key frame acquisition device can simultaneously capture key frames for multiple live channels; setting the key frame acquisition device so that the key frame acquisition device can continuously extract according to the set period
- the channel key frame can also be set to scale according to a certain size or scale before intercepting the key frame for static image compression coding.
- the key frame holding device 202 is configured to save the received key frame information, receive the key frame request message sent by the terminal, send the key frame information according to the request message, receive the EPG information, and save the correspondence between the EPG information and the key frame information. .
- the key frame acquiring device sends the acquired channel key frame to the key frame holding device together with the corresponding channel information and the key frame intercepting time information; the key frame saving device saves the key frame and the correspondence with the channel after receiving the key frame Relationship, if the key frame of the corresponding channel has been saved, the newly received key frame information is overwritten with the old key frame information; if the key frame of the channel is received for the first time, a storage area needs to be allocated in the memory for the channel. Create a channel keyframe record and save keyframe and channel correspondence information.
- the EPG server provides EPG information to the key frame holding means, and the key frame holding means associates the current key frame information with the program title based on the correspondence of the channel, the program, and the broadcast time in the EPG information.
- the key frame holding device may be a server, and a dedicated random access memory may be provided for storing key frame data and related information, so that the terminal request can be quickly responded; the key frame data can also be saved in the non-volatile nature of the server.
- Memory such as a hard disk.
- the key frame holding device 202 and the key frame obtaining device 201 can be deployed on the same server as different functional modules of the server, so that the key frame acquiring device can intercept the key frame information and then can pass the module interface between them. Pass data.
- the preferred key frame holding device can also be disposed inside the EPG server, and the key frame acquiring device can be directly connected to the EPG server.
- the key frames acquired by the key frame acquiring device can be directly sent to the EPG server through the internal network of the IPTV system, and the EPG server will receive
- the key frame data and related information are forwarded to the internal module key frame storage device, and the latter processes and saves the key frame data and related information; in this deployment mode, the function of the key frame storage device is added as an EPG server. Functional manifestation.
- the key frame saving device After obtaining the EPG information from the EPG server, the key frame saving device queries the channel program list corresponding to the currently processed key frame in the EPG, and then determines which program of the channel belongs to the key frame according to the intercept time of the key frame; The correspondence is saved together in the channel keyframe record.
- the channel keyframe record contains at least the following information:
- the channel label String is as follows: ChannelOOl
- the terminal 203 is configured to send a key frame request message, and receive and process a key frame message returned by the key frame holding device.
- the terminal When the user selects the channel to be viewed according to the displayed key frame, the terminal acquires the intervention URL of the channel from the EPG or the key frame information according to the channel key frame selected by the user, and then performs normal channel switching.
- the terminal receives the user's operation and generates a request message requesting to send the requested live channel program key frame; for the server side to respond faster, optionally, the terminal may request the user to specify the nearby channel according to the user's operation or default setting. Key frames of multiple channels or key frames requesting several channels adjacent to the current viewing channel by default; the terminal sends the generated request to the key frame holding device, and if the key frame holding device is separately deployed, the key frame holding device receives and processes the terminal The request sent.
- the remote controller can be operated, for example, by the following steps:
- the user sends a command to the terminal by using a control device, such as a remote controller; after receiving the command, the terminal displays a corresponding "channel switching navigation" menu option according to the configuration indication display device (such as a television); for example, the "channel switching navigation" menu option
- a control device such as a remote controller
- the terminal displays a corresponding "channel switching navigation" menu option according to the configuration indication display device (such as a television); for example, the "channel switching navigation” menu option
- the configuration indication display device such as a television
- the terminal After the user selects a certain sub-option, the terminal generates a key frame request message according to the user selection; for example, the request message may include the following information:
- This identifier indicates to the message recipient (in this embodiment, it is: EPG server) This message is the request channel key frame
- Message destination String key frame saves the IP address of the network element where the device is located.
- This implementation The address example is the EPG server where the key frame storage device is located.
- Channel ID column List List gives the table of key frames for which this message is requested to get.
- the user can select a browsing mode, for example: “Browse from the beginning” means that the user wants to start browsing from the first channel pre-stored in the terminal, and the first channel identifier in the channel identification list in the request message generated by the terminal Is the first channel identifier pre-stored in the terminal, the second channel identifier is the second channel identifier saved by the terminal, and so on; “Browsing from the current channel” indicates that the user wants to go forward from the channel currently being watched.
- the first channel identifier in the channel identifier list is the previous channel identifier of the currently played channel pre-stored in the terminal
- the second channel identifier is the second before the current broadcast channel saved by the terminal.
- Channel identification and so on; "Browsing from the current channel” indicates that the user wants to browse backwards from the channel currently being viewed.
- the first channel identifier in the channel identification list is the terminal.
- the last channel identifier of the currently playing channel pre-stored, and the second channel identifier is the terminal protection
- the second channel identifier after the current playback channel is saved, and so on.
- Random browsing means that the user wants to randomly view the program of any number of channels.
- the terminal can randomly select several channel identifiers to join the request message and request the corresponding key frame. This way can be set as the mode in which the terminal requests the key frame silently. .
- the corresponding network element receives the request and processes the request in the key frame holding device. For example, when the key frame holding device is in the EPG server, the EPG server receives the request message sent by the terminal, and when determining that the message type is "key frame request message", forwards the message to the key frame holding device.
- the terminal may further include one or two of the receiving module 2031, the decoding module 2032, and the static display control module 2034 and the dynamic display control module 2035.
- the decoding module 2032 parses the key frame message and decodes Key frame, and the decoded key frame is sent to the display device for display; when the key frame is displayed, the static display control module 2034 can be used to pause the current channel live program screen, and then the key frame is displayed on the display device, and the dynamic display can also be utilized.
- the control module 2035 superimposes the key frame and the picture being played, and displays the key frame on the picture being played;
- the display interface can display multiple channel key frames at a time, and according to a certain matrix form Arrange, for example, each page displays (2 rows x 3 columns) 6 key frames; in order to reduce the interaction between the terminal and the server and ensure that the key frames seen by the user are up-to-date, one request can request multiple key frames, which can be one screen display An integer multiple of the number of key frames, and the page turning button is displayed on the screen, and the other key frames are continuously displayed when the user selects the page turning; when the key frame returned by the request is displayed, if the user continues to turn the page, the terminal regenerates The new key frame request message requests the latest channel key frame intercepted by the server side, and the channel identifier requested in the newly generated request message can be incremented or decremented based on the last requested channel identifier.
- the terminal can time the user's operation. If the user stays in the navigation interface for too long, and does not perform channel switching, such as: short-term departure, when the user returns to the operation, the terminal will depend on whether the user leaves the time or not.
- the threshold is set to re-initiate a keyframe request to ensure that the keyframes viewed by the user are up to date. It is also possible for the user to initiate such a refresh operation by providing a refresh button in a certain place (for example, below) in the key frame display interface.
- the EPG server 204 is configured to provide EPG information to the key frame holding device.
- the channel key frame is extracted and the channel key frame is displayed for navigating the television program, and the terminal does not need to simultaneously access one or more non-view channel interception video data, and uses the present invention to perform television channel navigation.
- the bandwidth requirement is small.
- the embodiment of the present invention only needs to add a key frame extraction and storage device, and the terminal has small changes and low computing power requirements.
- FIG. 3 is a structural diagram of a key frame acquiring apparatus according to a third embodiment of the present invention.
- the key frame information acquiring unit 301 is configured to monitor a live channel that needs to extract a key frame, and periodically extract key frame information according to the configuration;
- the key frame information acquisition unit 301 can simultaneously monitor one or more live channels; and set the key frame acquisition device so that the key frame information acquisition unit 301 can continuously extract according to the set period.
- Channel keyframes you can also set the acquired keyframes to scale according to a certain size or scale.
- the sending unit 302 is configured to send the extracted key frame information.
- the acquired key frame information is sent together with the corresponding channel information.
- FIG. 4 a structural diagram of a key frame holding apparatus according to a fourth embodiment of the present invention is shown.
- a receiving unit 401 configured to receive key frame information and request information;
- the saving unit 402 is configured to save key frame information.
- the saving unit 402 saves the key frame and its corresponding relationship with the channel. If the key frame of the corresponding channel has been saved, the newly received key frame information is overwritten with the old key frame information; if the key frame of the channel is received for the first time, Then, it is necessary to allocate a storage area in the memory for the channel, create a channel key frame record, and save the key frame and channel correspondence information.
- the sending unit 403 is configured to send key frame information.
- the key frame holding device acquires the corresponding channel key frame and the corresponding program flag information from the memory according to the channel identification list in the request message, and packages the key frame information into key frame information.
- the key frame information includes at least the following contents:
- FIG. 5 is a structural diagram of a video terminal according to a fifth embodiment of the present invention.
- the receiving unit 501 is configured to receive a video signal and return a key frame signal processing unit 502 according to the key frame request message, for displaying the video and the key frame;
- Processing unit 502 further includes:
- Suspension unit 5021 used to pause the live program screen
- the superimposing unit 5022 is configured to add the decoded one or more key frames and the suspended live program picture.
- the processing unit 502 extracts the key frame in the message, and The key frame is displayed on the display device; when the key frame is displayed, the key frame and the picture being played need to be superimposed, thereby displaying the key frame on the screen being played; or the paused unit 5021 pauses the television program.
- the superimposing unit 5022 superimposes the channel key frame on the television screen; in the display interface, a plurality of channel key frames can be displayed at a time, for example, six key frames are displayed per page.
- the sending unit 503 is configured to send key frame request information.
- the program may be stored in a computer readable storage medium, and the storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.
- ROM Read Only Memory
- RAM Random Access Memory
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Description
电视节目导航方法、 装置和系统
本申请要求于 2008 年 08 月 04 日提交中国专利局、 申请号为 200810134289.0、 发明名称为 "电视节目导航方法、 装置和系统" 的中国专利 申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及数字电视技术领域，具体涉及电视节目导航方法、装置和系统。 背景技术
观看电视节目时， 用户经常通过频繁地切换电视频道，挨个浏览来搜索电 视节目。这时用户在搜索感兴趣的电视节目时， 只能搜索到每个频道切换当时 播放的电视节目，也就是当前频道播放的是什么节目， 用户搜索到的就是什么 节目， 却不能显示当前频道的节目列表， 可能当前频道即将播出用户感兴趣的 节目却由于用户未能获知而导致错过该节目。 为此交互式网络电视（IPTV, Internet Protocol Television )运营商提供电子节目指南 ( EPG, Electronic Program Guide ), 来方便用户浏览节目寻找感兴趣的节目。 EPG是一种使用在电视上 的相对实时的节目列表。 EPG提供商将 EPG存储在 EPG服务器上， 用户通 过因特网（INTERNET )或电话线将 EPG下载至机顶盒或电视的终端设备上， 这样终端设备就可以显示接收到的 EPG, 用户可以调用终端设备上的 EPG 来 察看其所感兴趣的节目播出时间和播出频道。现有技术方案在多个频道上接收 数字广播数据； 并且，在单个屏幕上同时输出所选择的一个频道的实时广播数 据和剩余频道的静止图像；同时在一个主频道和至少一个副频道上接收数字广 播数据。
在对现有技术的研究和实践过程中， 本发明的发明人发现， 因为终端需要 同时接收所设置的多个频道的广播数据，会占用很大带宽， 副频道占用的带宽 影响主频道数据的接收； 大范围的用户终端均使用这种终端时，将导致大量的 接入网带宽用于接收不真正显示的副频道数据。为了实现本现有技术描述的同 时显示多频道可视图像的方法，目前的机顶盒需要增加数量较多的緩存器和处 理模块来说实现过于复杂。
发明内容
本发明实施例提供电视节目导航方法、 装置和系统。
一种电视节目导航方法， 包括：
获取频道关键帧信息；
保存所述频道关键帧信息；
接收到关键帧请求时， 下发所述频道关键帧信息包含的频道关键帧， 以使 得终端在显示装置上显示所述频道关键帧。
一种频道关键帧显示方法， 包括：
依据设置或用户的选择向服务器请求至少一个频道的关键帧；
接收并解析服务器返回的关键帧消息；
依据设置将一个或多个频道关键帧发送至显示装置上进行显示。
一种电视节目导航系统， 包括：
关键帧获取装置， 用于监测需要提取关键帧的直播频道，根据配置周期性 提取关键帧信息， 发送提取的关键帧信息；
关键帧保存装置， 用于保存接收的关键帧信息，接收终端发送的关键帧请 求消息， 根据所述请求消息发送关键帧信息。
一种关键帧获取装置， 包括：
关键帧信息获取单元， 用于监测需要提取关键帧的直播频道，根据配置周 期性提取关键帧信息；
发送单元， 用于发送提取的关键帧信息。
一种关键帧保存装置， 包括：
接收单元，用于接收关键帧获取装置发送的关键帧信息和终端发来的关键 帧请求消息；
保存单元， 用于保存关键帧获取装置发送的关键帧信息；
发送单元， 用于发送返回给终端的关键帧消息。
一种视频终端， 包括：
发送单元， 用于发送关键帧请求消息；
接收单元， 用于接收视频信号和根据关键帧请求消息返回的关键帧消息； 处理单元， 用于解码视频和关键帧， 并将解码后的一个或多个关键帧和直 播节目画面叠加。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步 骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读 存储介质中， 存储介质可以包括： 只读存储（ ROM, Read Only Memory )、 随 机存取存储器（RAM, Random Access Memory ), 磁盘或光盘等。
本发明实施例采用提取频道关键帧并显示频道关键帧用以对电视节目进 行导航， 终端不需要同时接入一个或多个非观看频道截获视频数据，使用本发 明进行电视频道导航时， 所需带宽要求小； 本发明实施例只需要加入关键帧提 取和存储装置就可实现， 终端改动小， 运算能力要求低。
附图说明
图 1为本发明第一实施例提供的一种电视节目导航方法流程图；
图 2为本发明第二实施例提供的一种电视节目导航系统结构图；
图 3为本发明第三实施例提供的一种关键帧获取装置结构图；
图 4为本发明第四实施例提供的一种关键帧保存装置结构图；
图 5为本发明第五实施例提供的一种视频终端结构图。
具体实施方式
本发明实施例提供一种电视节目导航方法，解决终端同时接收所设置的多 个频道的广播数据进行显示导航，会占用很大带宽的问题。本发明实施例还提 供相应的装置和系统。 以下分别进行详细说明。
一种电视节目导航方法， 其特征在于， 包括：
获取频道关键帧信息；
获取频道关键帧信息的时候，对需要提取关键帧的直播频道进行监测， 并 依据预配置周期性的截取直播节目关键帧并记录关键帧截取时间；获取关键帧 之后还可以对关键帧进行缩放， 以节约存储资源和便于显示。
保存所述频道关键帧信息；
获取电子节目指南 EPG信息；
根据 EPG中的频道、 节目及播出时间的对应关系， 将当前关键帧信息和节 目标题进行关联， 这样就可以更好提供当前频道关键帧与 EPG信息的对应关 系， 以便于用户当前的关键帧是在频道的确切节目中截取的。
接收到关键帧请求时， 下发所述频道关键帧， 以使得终端在显示装置上显
示所述频道关键帧。
一种频道关键帧显示方法， 包括：
依据设置或用户的选择向服务器请求多个频道的关键帧；
接收并解析服务器返回的关键帧消息；
依据设置将一个或多个频道关键帧发送至显示装置上进行显示。
在显示装置上显示频道关键帧时，根据设置可以是将关键帧显示在暂停的 直播频道节目之上， 这样就减小了显示装置的处理工作量； 也可以是不暂停直 播频道直接显示频道关键帧。
请参阅图 1 , 为本发明第一实施例一种电视节目导航方法流程图， 本实施 例以 IPTV为例。
步骤 101: 关键帧获取装置获取频道关键帧信息。
关键帧获取装置获取频道关键帧、对应的频道信息及关键帧截取时间信息 作为频道关键帧信息。
关键帧获取装置可以接入头端编码器， 并截取直播频道的关键帧数据； 如 果关键帧获取装置在直播信号被编码前截取关键帧， 则不需要额外的解码操 作； 而如果在头端编码器对直播信号进行编码后截取关键帧数据， 则需要对截 获的码流进行解码后截取关键帧；在实际实施中不论关键帧获取装置在头端编 码器对直播数据编码前， 还是头端编码器对直播数据编码后截取关键帧数据， 都需要对头端编码器进行升级，增加头端编码器的软硬件接口，使得编码器能 够和关键帧获取装置连接。本实施例采用关键帧获取装置在头端编码器对直播 数据编码前进行截取关键帧的方式，以减少解码过程，获得更实时的处理效果。
关键帧获取装置连接编码器后， 就可从编码器中读取直播数据流。截取关 键帧时， 关键帧获取装置从编码器帧緩存器中复制一帧数据， 并进行静态图像 压缩编码， 减少关键帧数据量， 同时记录执行此操作的时间。 一个关键帧获取 装置可以同时从一个或多个编码器中获取关键帧数据。因为一个头端编码器和 一个直播频道对应，因此一个关键帧获取装置可同时为多个直播频道截取关键 帧； 对关键帧获取装置进行设置，使得关键帧获取装置可以按照设置的周期不 断的提取频道关键帧，还可以设置在截取关键帧进行静态图像压缩编码前按照 一定的尺寸或者比例进行缩放。
步骤 102: 关键帧获取装置发送频道关键帧消息到关键帧保存装置。
关键帧获取装置将获取的频道关键帧信息发送给关键帧保存装置，其中所 述频道关键帧信息包括频道关键帧、 对应的频道信息及关键帧截取时间信息； 关键帧保存装置收到关键帧后保存该关键帧及其和频道的对应关系，如果已经 保存了对应频道的关键帧， 则将新收到的关键帧信息覆盖旧关键帧信息； 如果 首次接收到该频道的关键帧， 则需要为该频道在存储器中分配一块存储区域， 创建一个频道关键帧记录， 保存关键帧和频道对应关系信息。
关键帧保存装置还可以和关键帧获取装置部署在同一个服务器上，作为服 务器的不同的功能模块，这样关键帧获取装置截取关键帧信息后可以通过他们 之间的模块接口即可传递数据。
进一步， EPG服务器也可以向关键帧保存装置提供 EPG信息， 关键帧保存 装置根据 EPG信息中的频道、节目以及播出时间和当前截取关键帧的截取时间 之间的对应关系将当前关键帧信息和节目标题进行关联。
关键帧保存装置也可以是一台独立服务器，并将截取的关键帧及相关信息 保存在随机访问存储器中， 这样可以快速响应终端请求； 也可以将关键帧数据 及相关信息保存在服务器的非易失性存储器， 比如硬盘中， 节省服务器资源。
关键帧保存装置还可以设置在 EPG服务器内部，关键帧获取装置就可以直 接与 EPG服务器相连，关键帧获取装置获取的关键帧可以通过 IPTV系统内部网 络直接发送到 EPG服务器， EPG服务器将接收到的关键帧数据及相关信息转发 给内部模块关键帧保存装置， 后者对关键帧数据及相关信息进行处理后保存； 这种部署方式下， 关键帧保存装置的功能就作为 EPG服务器的新增功能体现。
步骤 103: 关键帧保存装置保存频道关键帧。
关键帧保存装置从 EPG服务器获取 EPG信息后， 查询 EPG中对应当前处理 的关键帧的频道节目列表，然后依据关键帧的截取时间判断该关键帧属于频道 的哪个节目； 将节目标识和关键帧的对应关系一起保存在频道关键帧记录中。 频道关键帧记录至少含以下信息： 参数名称 参数类型 参数值
所属频道标 字串 （String ) 如： 频道（Channel ) 001
识
所属频道名 String 如： 中央一台
称
属于节目名 String 如： 新闻联播
称
关键帧标识 String 如： frm—ChannelOO 1
关键帧数据 二进制 二进制数据
步骤 104: 终端发送关键帧请求消息。
终端接收用户的操作，并生成要求服务器端发送所请求直播频道节目关键 帧的请求消息； 为了服务器侧响应更快， 可选的， 终端可以根据用户的操作选 择或者默认设置，对应地，请求用户指定频道附近的一个或多个频道的关键帧 或者默认请求当前观看频道相邻几个频道的关键帧；终端将生成的请求发送到 关键帧保存装置，如果关键帧保存装置单独部署， 则关键帧保存装置接收并处 理终端发送的请求。 详细过程如下描述：
用户需要获得直播频道节目信息时操作遥控器可以采用例如下列的步骤：
A、 用户利用控制设备， 比如遥控器， 向终端发送指令； 终端收到指令后 根据配置指示显示装置（例如电视机）显示相应的"频道切换导航 "菜单选项； 例如"频道切换导航 "菜单选项可以包括如下子选项： "从头开始浏览"， "从当 前频道往前浏览"， "从当前频道往后浏览"， 或者"随机浏览"； 用户选择其中 某一项。
B、 用户选择某一个选项后， 终端依据用户选择生成关键帧请求消息； 该 请求消息至少包含以下信息:
参数名 参数类型 功能
消息类型标 String 此标识向消息接收者表明 （本实施例中是 识 如： EPG服务器） 此条消息是请求频道关键帧
RequestChannel 的；
Frame
消息目的地 String 关键帧保存装置所在网元的 IP地址，本实施 址 例是关键帧保存装置所在的 EPG服务器的
IP地址；
消息源地址 String 终端 IP地址
频道标识列 List <频道标识>列表形式给出此消息请求获取 表 对应关键帧的是哪些频道
c、 用户可以选择浏览方式， 例如： "从头开始浏览"表明用户想要从终端 中预存的第一个频道开始浏览， 则终端生成的请求消息中， 频道标识列表中的 第一个频道标识就是终端中预存的第一个频道标识，第二个频道标识就是终端 保存的第二个频道标识， 依此类推； "从当前频道往前浏览"表明用户想要从 当前正在收看的频道向前浏览， 则终端生成的请求消息中， 频道标识列表中的 第一个频道标识就是终端中预存的当前播放频道的前一个频道标识，第二个频 道标识就是终端保存的当前播放频道的之前第二个频道标识， 依此类推； "从 当前频道往后浏览"表明用户想要从当前正在收看的频道向后浏览，则终端生 成的请求消息中，频道标识列表中的第一个频道标识就是终端中预存的当前播 放频道的后一个频道标识，第二个频道标识就是终端保存的当前播放频道的之 后第二个频道标识， 依此类推。 "随机浏览"表示用户希望随机查看任意几个频 道的节目情况， 终端可以随机选择几个频道标识加入到请求消息中，请求对应 的关键帧， 这种方式可以设置为终端默请求关键帧的方式。
如果关键帧保存装置作为现有 IPTV网元的功能模块， 则由对应的网元接 收请求并在关键帧保存装置处理请求。 例如： 关键帧保存装置在 EPG服务器中 时， 由 EPG服务器接收终端发来的请求消息， 当判断消息类型为"关键帧请求 消息"时， 转发该消息到关键帧保存装置。
步骤 105: 关键帧保存装置根据关键帧请求消息发送关键帧信息。
关键帧保存装置根据接收到的关键帧请求消息挑选保存的关键帧信息，将 挑选到的关键帧信息发送给终端。
例如：关键帧保存装置依据请求消息中的频道标识列表从存储器中查找对 应的频道关键帧记录， 然后获取关键帧数据以及对应的节目标识信息， 并打包 成关键帧返回信息。 所述关键帧返回消息中至少包括如下内容：
参数名称 参数类型 参数功能
消息类型 String: 此标识用于终端分辨该服务器侧发来
例 如 ： 的消息是哪个消息
ChannelFrameResponse
消息目的地 String 消息接收者 IP地址， 即终端 IP地址 址
消息源地址 String 消息发送者 IP地址， 本实施例中是 EPG 服务器 IP地址
关键帧信息 List 包含了 <频道标识,节目标识， 关键帧标 列表 识 >三元组信息；
关键帧数据 二进制数据 图片数据
频道 URL String 频道 URL, 此参数为可选项。
步骤 106: 终端根据关键帧信息显示关键帧。
终端接收到关键帧返回消息后， 解析关键帧消息， 解码关键帧， 并将解码 后的关键帧发送到显示装置进行显示；显示关键帧时可以暂停当前频道直播节 目画面， 然后将关键帧在显示装置上显示，也可以将关键帧和正在播放中的画 面进行叠加，将关键帧显示在正在播放的画面之上； 显示界面中可以一次显示 多个频道关键帧， 并按一定的矩阵形式排列， 例如每页显示（2行 x3列） 6个关 键帧； 为了减少终端和服务器的交互并且保证用户看到的关键帧是最新的，一 次请求可以请求多个关键帧， 可以是一屏显示关键帧个数的整数倍， 并在画面 上显示翻页按钮， 当用户操作选择翻页时继续显示其他关键帧； 当一次请求返 回的关键帧显示完以后，如果用户继续翻页， 终端再生成新的关键帧请求消息 请求服务器侧最新截取的频道关键帧，且新生成的请求消息中所请求的频道标 识可以在上次请求的频道标识的基础上递增或递减。
此外， 终端可以对用户的操作进行计时， 如果用户停留在导航界面太久， 而没有进行频道切换， 如： 短时间的离开， 当用户返回操作时， 终端将依据用 户离开的时间是否达到一个设定的阈值来重新发起一次关键帧请求，以保证用 户浏览的关键帧是最新的。也可以用户自己发起这种刷新操作，在关键帧显示 界面中某一个地方 （例如下方）提供一个刷新按钮即可。
步骤 106后， 如果用户根据显示的关键帧选中想要观看的频道， 终端依据 用户选择的频道关键帧， 从 EPG或者关键帧信息中获取该频道的接入 URL, 然
后进行正常的频道切换； 如果关键帧返回信息中包含有频道接入 URL, 则选中 关键帧进行频道切换时不需要通过 EPG服务器查找频道接入 URL。
本发明实施例中采用提取频道关键帧并显示频道关键帧用以对电视节目 进行导航， 终端不需要同时接入一个或多个非观看频道截获视频数据，使用本 发明进行电视频道导航时， 所需带宽要求小； 只需要加入关键帧提取和存储装 置就可实现， 终端改动小， 运算能力要求低。
请参阅图 2为本发明第二实施例提供的一种电视节目导航系统结构图。 关键帧获取装置 201 , 用于监测需要提取关键帧的直播频道， 根据配置周 期性提取关键帧信息， 发送提取的关键帧信息。
在实际操作中关键帧获取装置可以接入头端编码器，并截取直播频道的关 键帧数据； 如果关键帧获取装置在直播信号被编码前截取关键帧， 则不需要额 外的解码操作； 而如果在头端编码器对直播信号进行编码后截取关键帧数据， 则需要对截获的码流进行解码后截取关键帧；在实际实施中不论关键帧获取装 置在头端编码器对直播数据编码前，还是头端编码器对直播数据编码后截取关 键帧数据， 都需要对头端编码器进行升级， 增加头端编码器的软硬件接口， 使 得编码器能够和关键帧获取装置连接。本实施例采用关键帧获取装置在头端编 码器对直播数据编码前进行截取关键帧的方式， 以减少解码过程， 获得更实时 的处理效果。
关键帧获取装置连接编码器后， 就可从编码器中读取直播数据流。截取关 键帧时， 关键帧获取装置从编码器帧緩存器中复制一帧数据， 并进行静态图像 压缩编码， 减少关键帧数据量， 同时记录执行此操作的时间。 一个关键帧获取 装置可以同时从一个或多个编码器中获取关键帧数据。因为一个头端编码器和 一个直播频道对应，因此一个关键帧获取装置可同时为多个直播频道截取关键 帧； 对关键帧获取装置进行设置，使得关键帧获取装置可以按照设置的周期不 断的提取频道关键帧，还可以设置在截取关键帧进行静态图像压缩编码前按照 一定的尺寸或者比例进行缩放。
关键帧保存装置 202, 用于保存接收的关键帧信息， 接收终端发送的关键 帧请求消息， 根据所述请求消息发送关键帧信息， 接收 EPG信息并保存所述 EPG信息与关键帧信息的对应关系。
关键帧获取装置将获取的频道关键帧发送给关键帧保存装置时连同对应 的频道信息及关键帧截取时间信息一起发送；关键帧保存装置收到关键帧后保 存该关键帧及其和频道的对应关系，如果已经保存了对应频道的关键帧， 则将 新收到的关键帧信息覆盖旧关键帧信息； 如果首次接收到该频道的关键帧， 则 需要为该频道在存储器中分配一块存储区域，创建一个频道关键帧记录，保存 关键帧和频道对应关系信息。
EPG服务器向关键帧保存装置提供 EPG信息， 关键帧保存装置根据 EPG信 息中的频道、节目以及播出时间的对应关系将当前关键帧信息和节目标题进行 关联。
关键帧保存装置可以是一台服务器，可以提供一个而专门的随机访问存储 器用来存储关键帧数据及相关信息， 这样可以快速响应终端请求； 也可以将关 键帧数据保存在服务器的非易失性存储器， 比如硬盘中。
实际配置中关键帧保存装置 202和关键帧获取装置 201可以部署在同一个 服务器上，作为服务器的不同的功能模块， 这样关键帧获取装置截取关键帧信 息后可以通过他们之间的模块接口即可传递数据。
优选的关键帧保存装置还可以设置在 EPG服务器内部，关键帧获取装置就 可以直接与 EPG服务器相连，关键帧获取装置获取的关键帧可以通过 IPTV系统 内部网络直接发送到 EPG服务器， EPG服务器将接收到的关键帧数据及相关信 息转发给内部模块关键帧保存装置，后者对关键帧数据及相关信息进行处理后 保存； 这种部署方式下， 关键帧保存装置的功能就作为 EPG服务器的新增功能 体现。
关键帧保存装置从 EPG服务器获取 EPG信息后， 查询 EPG中对应当前处理 的关键帧的频道节目列表，然后依据关键帧的截取时间判断该关键帧属于频道 的哪个节目； 将节目标识和关键帧的对应关系一起保存在频道关键帧记录中。 频道关键帧记录至少含以下信息：
参数名称 参数类型 参数值
所属频道标 String 如： ChannelOOl
识
所属频道名 String 如： 中央一台
称
属于节目名 String 如： 新闻联播
称
关键帧标识 String 如： frm—ChannelOO 1
关键帧数据 二进制 二进制数据
终端 203 , 用于发送关键帧请求消息， 接收并处理关键帧保存装置返回的 关键帧消息。
用户根据显示的关键帧选中想要观看的频道时 ,终端依据用户选择的频道 关键帧， 从 EPG或者关键帧信息中获取该频道的介入 URL, 然后进行正常的频 道切换。
终端接收用户的操作，并生成要求发送所请求的直播频道节目关键帧的请 求消息； 为了服务器侧响应更快， 可选的， 终端可以根据用户的操作或者默认 设置，请求用户指定的频道附近的多个频道的关键帧或者默认请求当前观看频 道相邻几个频道的关键帧； 终端将生成的请求发送到关键帧保存装置，如果关 键帧保存装置单独部署， 则关键帧保存装置接收并处理终端发送的请求。
用户需要获得直播频道节目信息时操作遥控器可以采用例如下列的步骤：
A、 用户利用控制设备， 比如遥控器， 向终端发送指令； 终端收到指令后 根据配置指示显示装置（例如电视机）显示相应的"频道切换导航 "菜单选项； 例如"频道切换导航 "菜单选项可以包括如下子选项： "从头开始浏览"， "从当 前频道往前浏览"， "从当前频道往后浏览"，， 或者"随机浏览"； 用户选择其中 某一项。
B、 用户选择某一个子选项后， 终端依据用户选择生成关键帧请求消息; 例如该请求消息可以包含以下信息：
参数名 参数类型 功能
消息类型标 String 此标识向消息接收者表明 （本实施例中是 识 如： EPG服务器） 此条消息是请求频道关键帧
RequestChannel 的；
Frame
消息目的地 String 关键帧保存装置所在网元的 IP地址，本实施
址 例是关键帧保存装置所在的 EPG服务器的
IP地址；
消息源地址 String 终端 IP地址
频道标识列 List 列表形式给出此消息请求获取哪些频道的 表 关键帧
c、 用户可以选择浏览方式， 例如： "从头开始浏览"表示表明用户想要从 终端中预存的第一个频道开始浏览， 则终端生成的请求消息中， 频道标识列表 中的第一个频道标识就是终端中预存的第一个频道标识，第二个频道标识就是 终端保存的第二个频道标识， 依此类推； "从当前频道往前浏览" 表明用户想 要从当前正在收看的频道向前浏览， 则终端生成的请求消息中， 频道标识列表 中的第一个频道标识就是终端中预存的当前播放频道的前一个频道标识，第二 个频道标识就是终端保存的当前播放频道的之前第二个频道标识， 依此类推； "从当前频道往后浏览"表明用户想要从当前正在收看的频道向后浏览， 则终 端生成的请求消息中，频道标识列表中的第一个频道标识就是终端中预存的当 前播放频道的后一个频道标识，第二个频道标识就是终端保存的当前播放频道 的之后第二个频道标识， 依此类推。 "随机浏览"表示用户希望随机查看任意几 个频道的节目情况， 终端可以随机选择几个频道标识加入到请求消息中，请求 对应的关键帧， 这种方式可以设置为终端默请求关键帧的方式。
如果关键帧保存装置作为现有 IPTV网元的子功能模块， 则由对应的网元 接收请求并在关键帧保存装置处理请求。 例如： 关键帧保存装置在 EPG服务器 中时， 由 EPG服务器接收终端发来的请求消息， 当判断消息类型为"关键帧请 求消息"时， 转发该消息到关键帧保存装置。
终端还可以包括接收模块 2031、解码模块 2032以及静态显示控制模块 2034 和动态显示控制模块 2035中的一个或两个，接收模块 2031接收到关键帧返回消 息后， 解码模块 2032解析关键帧消息， 解码关键帧， 并将解码后的关键帧发送 到显示装置进行显示；显示关键帧时可以利用静态显示控制模块 2034暂停当前 频道直播节目画面， 然后将关键帧在显示装置上显示，也可以利用动态显示控 制模块 2035将关键帧和正在播放中的画面进行叠加，将关键帧显示在正在播放 的画面之上； 显示界面中可以一次显示多个频道关键帧， 并按一定的矩阵形式
排列， 例如每页显示（2行 x3列） 6个关键帧； 为了减少终端和服务器的交互并 且保证用户看到的关键帧是最新的， 一次请求可以请求多个关键帧， 可以是一 屏显示关键帧个数的整数倍， 并在画面上显示翻页按钮， 当用户操作选择翻页 时继续显示其他关键帧； 当一次请求返回的关键帧显示完以后，如果用户继续 翻页， 终端再生成新的关键帧请求消息请求服务器侧最新截取的频道关键帧， 且新生成的请求消息中所请求的频道标识可以在上次请求的频道标识的基础 上递增或递减。
此外， 终端可以对用户的操作进行计时， 如果用户停留在导航界面太久， 而没有进行频道切换， 如： 短时间的离开， 当用户返回操作时， 终端将依据用 户离开的时间是否达到一个设定的阈值来重新发起一次关键帧请求，以保证用 户浏览的关键帧是最新的。也可以用户自己发起这种刷新操作，在关键帧显示 界面中某一个地方 （例如下方）提供一个刷新按钮即可。
EPG服务器 204, 用于向关键帧保存装置提供 EPG信息。
本发明实施例中采用提取频道关键帧并显示频道关键帧用以对电视节目 进行导航， 终端不需要同时接入一个或多个非观看频道截获视频数据，使用本 发明进行电视频道导航时， 所需带宽要求小； 本发明实施例只需要加入关键帧 提取和存储装置就可实现， 终端改动小， 运算能力要求低。
请参阅图 3 , 为本发明第三实施例提供的一种关键帧获取装置的结构图。 关键帧信息获取单元 301 , 用于监测需要提取关键帧的直播频道， 根据配 置周期性提取关键帧信息；
关键帧获取装置接入后监测直播频道， 关键帧信息获取单元 301可以同时 监测一个或多个直播频道； 对关键帧获取装置进行设置，使得关键帧信息获取 单元 301可以按照设置的周期不断的提取频道关键帧， 还可以设置获取的关键 帧按照一定的尺寸或者比例进行缩放。
发送单元 302, 用于发送提取的关键帧信息。
发送获取的关键帧信息时连同对应的频道信息一起发送。
请参阅图 4, 为本发明第四实施例提供的一种关键帧保存装置结构图。 接收单元 401 , 用于接收关键帧信息和请求信息；
保存单元 402, 用于保存关键帧信息；
保存单元 402保存该关键帧及其和频道的对应关系， 如果已经保存了对应 频道的关键帧， 则将新收到的关键帧信息覆盖旧关键帧信息； 如果首次接收到 该频道的关键帧， 则需要为该频道在存储器中分配一块存储区域，创建一个频 道关键帧记录， 保存关键帧和频道对应关系信息。
发送单元 403 , 用于发送关键帧信息。
关键帧保存装置依据请求消息中的频道标识列表从存储器中获取对应的 频道关键帧以及对应的节目标志信息， 并打包成关键帧信息。所述关键帧信息 中至少包括如下内容：
请参阅图 5 , 为本发明第五实施例提供的一种视频终端结构图。
接收单元 501 , 用于接收视频信号和根据关键帧请求消息返回的关键帧信 处理单元 502, 用于显示视频和关键帧；
处理单元 502进一步包括：
暂停单元 5021 , 用于暂停直播节目画面；
叠加单元 5022,用于将解码后的一个或多个关键帧和暂停的直播节目画面 加。
接收单元 501收到关键帧消息后， 处理单元 502提取消息中的关键帧， 并将
关键帧显示在显示装置上；显示关键帧时需要将关键帧和正在播放中的画面进 行叠加， 由此将关键帧显示在正在播放的画面之上； 或者由暂停单元 5021将电 视节目暂停后， 叠加单元 5022将频道关键帧叠加在电视画面之上； 显示界面中 可以一次显示多个频道关键帧， 例如每页显示 6个关键帧。
发送单元 503 , 用于发送关键帧请求信息。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步 骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读 存储介质中， 存储介质可以包括： 只读存储（ROM, Read Only Memory )、 随 机存取存储器（RAM, Random Access Memory ), 磁盘或光盘等。
施例的说明只是用于帮助理解本发明的方法及其核心思想； 同时，对于本领域 的一般技术人员，依据本发明的思想， 在具体实施方式及应用范围上均会有改 变之处， 综上所述， 本说明书内容不应理解为对本发明的限制。
Claims
1、 一种电视节目导航方法， 其特征在于， 包括：
获取频道关键帧信息；
保存所述频道关键帧信息；
接收到关键帧请求时， 下发所述频道关键帧信息包含的频道关键帧， 以使 得终端在显示装置上显示所述频道关键帧。
2、根据权利要求 1所述的电视节目导航方法， 其特征在于， 所述获取频道 关键帧信息具体为：
监测需要提取关键帧的直播频道，并依据预配置周期性的截取直播节目关 键帧并记录关键帧截取时间。
3、根据权利要求 2所述的电视节目导航方法， 其特征在于， 所述获取频道 关键帧信息后还包括：
根据预配置对所述频道关键帧进行缩放。
4、根据权利要求 2所述的电视节目导航方法， 其特征在于， 保存所述频道 关键帧信息后还包括：
获取电子节目指南 EPG信息；
根据 EPG中的频道、 节目及播出时间的对应关系， 将当前关键帧信息和节 目标题进行关联。
5、根据权利要求 1所述的电视节目导航方法， 其特征在于， 保存所述频道 关键帧还包括：
当已经保存了对应频道的关键帧时， 将新收到的关键帧覆盖旧关键帧； 当首次接收到频道的关键帧时， 为所述频道创建一个频道关键帧记录，保 存关键帧和频道对应关系信息。
6、 一种频道关键帧显示方法， 其特征在于， 包括：
依据设置或用户的选择向服务器请求至少一个频道的关键帧；
接收并解析服务器返回的关键帧消息；
依据设置将一个或多个频道关键帧发送至显示装置上进行显示。
7、根据权利要求 6所述的频道关键帧显示方法， 其特征在于， 将一个或多 个频道关键帧发送至显示装置上进行显示具体为：
将关键帧叠加在当前频道的暂停的直播节目画面之上， 在显示装置上显 示。
8、根据权利要求 6所述的频道关键帧显示方法， 其特征在于， 将一个或多 个频道关键帧发送至显示装置上进行显示具体为：
将关键帧叠加在当前频道动态的直播节目画面之上在显示装置上显示。
9、根据权利要求 6所述的频道关键帧显示方法， 其特征在于， 依据设置将 一个或多个频道关键帧发送至显示装置上进行显示后还包括：
依据用户选择的频道关键帧， 从 EPG或关键帧信息中获取该频道的接入 URL, 进行频道切换。
10、 一种电视节目导航系统， 包括关键帧获取装置、 可与终端通讯的关键 帧保存装置， 其特征在于：
关键帧获取装置， 用于监测需要提取关键帧的直播频道，根据配置周期性 提取关键帧信息， 发送提取的关键帧信息；
关键帧保存装置， 用于保存接收的关键帧信息，接收终端发送的关键帧请 求消息， 根据所述请求消息发送关键帧信息。
11、 根据权利要求 10所述的电视节目导航系统， 其特征在于， 所述系统进 一步包括：
EPG服务器， 用于向关键帧保存装置提供 EPG信息。
12、 根据权利要求 11所述的电视节目导航系统， 其特征在于， 所述关键帧 保存装置进一步用于：
获取 EPG信息并保存所述 EPG信息与关键帧信息的对应关系。
13、 根据权利要求 10或 11所述的电视节目导航系统， 其特征在于， 所述终 端进一步包括：
接收模块， 用于接收频道关键帧消息；
解码模块， 用于对所述频道关键帧消息中的关键帧数据进行解码。
14、 根据权利要求 13所述的电视节目导航系统， 其特征在于， 所述终端进 一步包括：
静态显示控制模块，用于将解码后的关键帧和当前播放节目的暂停画面叠 加， 再将叠加的画面数据发送到显示装置。
15、 根据权利要求 13所述的电视节目导航系统， 其特征在于， 所述终端进 一步包括：
动态显示控制模块，用于将解码后的关键帧和当前播放节目的动态画面叠 加， 再将叠加的画面数据发送到显示装置。
16、 一种关键帧获取装置， 包括关键帧信息获取单元和发送单元， 其特征 在于：
关键帧信息获取单元， 用于监测需要提取关键帧的直播频道，根据配置周 期性提取关键帧信息；
发送单元， 用于发送提取的关键帧信息。
17、 根据权利要求 16所述的关键帧获取装置， 其特征在于还包括： 关键帧缩放单元， 根据预配置对关键帧进行缩放。
18、 一种关键帧保存装置， 包括接收单元、 发送单元和保存单元， 其特征 在于：
接收单元，用于接收关键帧获取装置发送的关键帧信息和终端发来的关键 帧请求消息；
保存单元， 用于保存关键帧获取装置发送的关键帧信息；
发送单元， 用于发送返回给终端的关键帧消息。
19、 一种视频终端， 包括接收单元、 处理单元和发送单元， 其特征在于： 发送单元， 用于发送关键帧请求消息；
接收单元， 用于接收视频信号和根据关键帧请求消息返回的关键帧消息； 处理单元， 用于解码视频和关键帧， 并将解码后的一个或多个关键帧和直 播节目画面叠加。
20、 根据权利要求 19所述的视频终端， 其特征在于所述处理单元还包括： 暂停单元， 用于暂停直播节目画面；
叠加单元， 用于将解码后的一个或多个关键帧和暂停的直播节目画面叠 加。
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| CN101345838A (zh) * | 2008-08-04 | 2009-01-14 | 华为技术有限公司 | 电视节目导航方法、装置和系统 |
| CN102694989A (zh) * | 2011-08-26 | 2012-09-26 | 新奥特（北京）视频技术有限公司 | 一种电视节目多媒体文件的传输方法及系统 |
| CN102694743A (zh) * | 2011-09-01 | 2012-09-26 | 新奥特（北京）视频技术有限公司 | 一种即时通讯系统中多媒体文件的传输方法及系统 |
| CN102868929B (zh) * | 2012-08-31 | 2016-02-17 | 深圳市同洲电子股份有限公司 | 视频显示方法、系统和终端 |
| CN102917257A (zh) * | 2012-09-14 | 2013-02-06 | 北京金山安全软件有限公司 | 选台处理方法、客户端、服务器和系统 |
| CN102905168B (zh) * | 2012-11-02 | 2015-12-02 | 郝晓伟 | 一种实时提供电视节目单的方法及系统 |
| CN103873936B (zh) * | 2012-12-10 | 2017-12-01 | 联想(北京)有限公司 | 一种播放方法及电子设备 |
| CN103414856B (zh) * | 2013-07-31 | 2017-06-09 | 小米科技有限责任公司 | 一种进行频道预览的方法和装置 |
| CN103581729B (zh) * | 2013-08-15 | 2019-01-22 | 科大讯飞股份有限公司 | 基于视频监测的互动方法及系统 |
| CN104754414A (zh) * | 2013-12-25 | 2015-07-01 | 乐视网信息技术（北京）股份有限公司 | 一种终端及其显示节目信息方法 |
| CN104270672A (zh) * | 2014-09-12 | 2015-01-07 | 无锡天脉聚源传媒科技有限公司 | 一种视频处理方法及装置 |
| CN104902338A (zh) * | 2015-05-25 | 2015-09-09 | 广州视源电子科技股份有限公司 | 一种电视频道预览方法和装置 |
| CN105681827B (zh) * | 2016-03-04 | 2019-10-18 | 华为技术有限公司 | 直播频道的海报生成方法、系统及相关装置 |
| CN109005420B (zh) * | 2018-08-10 | 2021-08-24 | 深圳Tcl数字技术有限公司 | 视频帧播放、获取方法、电视、云平台服务器及系统 |
| CN109584655A (zh) * | 2018-12-03 | 2019-04-05 | 贵阳朗玛信息技术股份有限公司 | 一种远程演示方法、装置、教学系统及可读存储介质 |
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