CN112153450B - Set top box picture display method - Google Patents
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- CN112153450B CN112153450B CN202010841878.3A CN202010841878A CN112153450B CN 112153450 B CN112153450 B CN 112153450B CN 202010841878 A CN202010841878 A CN 202010841878A CN 112153450 B CN112153450 B CN 112153450B
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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
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
Abstract
The invention provides a set-top box picture display method in the technical field of set-top boxes, which comprises the following steps: step S10, the set-top box receives the picture compression file to be displayed when the set-top box is started; step S20, after verifying the size of the picture compression file based on the size of the flash, the set-top box stores the picture compression file into the flash or other storage areas; step S30, the set-top box verifies the validity of the stored picture compression file; step S40, the set-top box verifies the validity of the compressed file packet of the picture compressed file; and step S50, the set-top box decompresses the compressed file packet to obtain the picture, and the picture is sequentially displayed based on the compressed file packet header and the picture data packet header of the picture compressed file. The invention has the advantages that: the storage space of the picture is greatly saved, and the operation stability of the set top box and the picture display effect are improved.
Description
Technical Field
The invention relates to the technical field of set top boxes, in particular to a set top box picture display method.
Background
With the progress of society and the development of science and technology, the living standard of people is increasingly improved, the demand of people on spiritual life is also increased, and watching television programs becomes a preferred item of people, so that the set top box becomes a necessary product for every family. With the development of advertisements, the implantation of advertisements in set-top boxes becomes a means and a trend for operators to publicize products and obtain profits, and especially the implantation of start-up advertisements in set-top boxes makes it extremely important to design a set-top box with start-up advertisements and stable operation.
In order to implant a boot advertisement in a set-top box and shorten boot time, the conventional method is as follows: the starting-up advertisement picture received from the front end for the first time is stored in the flash of the set-top box, so that the set-top box can be directly displayed when being started up next time, and the situation that the picture is received first and then displayed is avoided. However, the conventional method has the following disadvantages: when the allocated storage space is not enough to store the startup advertisement picture, the startup advertisement picture cannot be normally displayed, and the size of the startup advertisement picture is not judged, even the set top box is crashed and becomes a brick.
Therefore, how to provide a picture display method for a set-top box to save the storage space of pictures, improve the operation stability of the set-top box and improve the picture display effect becomes a problem to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a picture display method for a set top box, which can save the storage space of pictures, improve the operation stability of the set top box and improve the picture display effect.
The invention is realized by the following steps: a picture display method for a set top box is characterized in that: the method comprises the following steps:
step S10, the set-top box receives the picture compression file to be displayed when the set-top box is started;
step S20, after verifying the size of the picture compression file based on the size of the flash, the set-top box stores the picture compression file into the flash or other storage areas;
step S30, the set-top box verifies the validity of the stored picture compression file;
step S40, the set-top box verifies the validity of the compressed file packet of the picture compressed file;
and step S50, the set-top box decompresses the compressed file packet to obtain the picture, and the picture is sequentially displayed based on the compressed file packet header and the picture data packet header of the picture compressed file.
Further, in the step S10, the picture compressed file includes a compressed file header and a compressed file body; the compressed file packet body comprises a plurality of pieces of picture data information; each piece of picture data information comprises a picture data packet header and picture data;
the compressed file packet header is provided with a first reserved fixed value, a first index value, a compressed file packet header crc value, a compressed file packet body size, a compressed file packet header identifier, the number of pictures and a picture compressed file name;
the picture data packet header is provided with a second reserved fixed value, a second index value, a picture data packet header crc value, a picture data size, a picture display duration, a picture format, a picture compression format, a picture storage position identifier, a picture storage position, an offset address of the picture storage position and a picture name.
Further, the value of the picture storage location identifier is a picture storage path or a null value, and the null value indicates that the picture data is stored in the flash.
Further, the step S20 specifically includes:
step S21, the set top box positions a compressed file header based on the compressed file header identifier, reads the size of a compressed file packet from the compressed file header, judges whether the size of the compressed file packet is smaller than or equal to the size of a flash, and stores the picture compressed file into the flash if the size of the compressed file packet is smaller than or equal to the size of the flash; if not, go to step S22;
and step S22, based on the size of the picture data packet header, stripping the picture data exceeding the size of the flash and storing the picture data into other storage areas, updating the picture storage position corresponding to the stripped picture data and the offset address of the picture storage position, and regenerating a picture compression file and storing the picture compression file into the flash.
Further, the step S30 is specifically:
the set top box performs crc calculation on the size of the compressed file packet body of the compressed file packet header, the identifier of the compressed file packet header, the number of pictures and the name of the picture compressed file to obtain a first crc value;
performing crc calculation on the compressed file inclusion to obtain a second crc value;
judging whether the first reserved fixed value is equal to a first index value, the first crc value is equal to a header crc value of the compressed file, the second crc value is equal to a packet crc value of the compressed file and the number of pictures is greater than 0, if so, passing validity verification, and entering step S40; if not, the validity verification fails, and the process is ended.
Further, the step S40 is specifically:
the set top box reads a compressed file packet of the picture compressed file to further obtain picture data information;
the set top box performs crc calculation on the picture data size, the picture display duration, the picture format, the picture compression format, the picture storage position, the offset address of the picture storage position and the picture name of the picture data packet header of each piece of picture data information to obtain a third crc value;
performing crc calculation on the picture data of each picture data information to obtain a fourth crc value;
judging whether the first reserved fixed value is equal to the first index value, the third crc value is equal to the crc value of the picture data packet header and the fourth crc value is equal to the crc value of the picture data, if so, passing the validity verification, and entering the step S50; if not, the validity verification is not passed, and the validity verification is carried out on the next picture data information.
Further, the step S50 specifically includes:
step S51, the set top box judges whether the picture data are stored in the flash in sequence based on the picture storage position identifiers of the picture data headers, if so, the set top box enters step S52; if not, finding the corresponding picture data based on the picture storage position of the picture data packet header and the offset address of the picture storage position, and entering step S52;
step S52, decompressing the picture data based on the picture compression format;
step S53, decoding the decompressed picture data based on the picture format to obtain a picture, and setting a color mode for picture display;
step S54, the set-top box displays each picture in sequence based on the picture display duration when starting up;
step S55, judging whether all pictures are displayed completely based on the number of the pictures, if so, stopping displaying the pictures; if not, the process proceeds to step S51.
Further, in the step S53, the color mode is ARGB 8888.
The invention has the advantages that:
1. the size of the received picture compression file is verified, whether the size of the picture compression file exceeds the size of the flash is judged, if yes, the picture data exceeding the size of the flash is stripped and stored in other storage areas, the situation that the picture cannot be normally displayed due to insufficient storage space of the flash is avoided, and the situation that a set top box is halted and turned into a brick block due to the fact that the picture compression file is too large is also avoided; the pictures are compressed into picture data and stored in the picture compression file, so that the space occupied by the pictures is reduced, and more pictures can be stored; and to picture conversion color mode, the display effect is more clear, very big saving the memory space of picture promptly, very big promotion STB operating stability and picture display effect.
2. The integrity of the picture data is ensured by performing crc (cyclic redundancy check) on the compressed file packet header, the compressed file packet body, the picture data packet header and the picture data of the picture compressed file, so that a complete picture is decoded, if the crc of a certain picture fails, the next picture is directly displayed, and the picture display effect is further improved.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a flowchart of a set-top box picture display method according to the present invention.
Detailed Description
Referring to fig. 1, a preferred embodiment of a method for displaying pictures on a set-top box according to the present invention includes the following steps:
step S10, the set-top box receives the picture compression file to be displayed when the set-top box is started; the picture compression file comprises a plurality of compressed pictures;
step S20, after verifying the size of the picture compression file based on the size of the flash, the set-top box stores the picture compression file into the flash or other storage areas; the phenomenon that pictures cannot be normally displayed due to insufficient storage space of flash is avoided, and the phenomenon that a set top box is crashed into bricks due to overlarge picture compression files is also avoided;
step S30, the set-top box verifies the validity of the stored picture compression file;
step S40, the set-top box verifies the validity of the compressed file packet of the picture compressed file; in the transmission process of the picture compressed file, a certain party may be suddenly interrupted during data sending or receiving, or the receiving time set by a receiving party is insufficient, so that the data is incomplete, and the integrity of the picture compressed file can be known through validity verification;
and step S50, the set-top box decompresses the compressed file packet to obtain the picture, and the picture is sequentially displayed based on the compressed file packet header and the picture data packet header of the picture compressed file.
In step S10, the picture compressed file includes a compressed file header and a compressed file packet body; the compressed file packet body comprises a plurality of pieces of picture data information; each piece of picture data information comprises a picture data packet header and picture data;
the compressed file header is provided with a first reserved fixed value (bh _ magic), a first index value (bh _ INDEXER), a compressed file header crc value (bh _ hcrc), a compressed file body crc value (bh _ dcrc), a compressed file body size (bh _ size), a compressed file header identifier (BP _ INDEXER _ TOTAL), a picture number (bh _ count) and a picture compressed file name (bh _ name);
the picture data header is provided with a second reserved fixed value (bh _ magic), a second index value (bh _ index), a picture data header crc value (bh _ hcrc), a picture data crc value (bh _ dcrc), a picture data size (bh _ size), a picture display time length (bh _ seconds), a picture format (bh _ type), a picture compression format (bh _ comp), a picture storage location identifier (bh _ location), a picture storage location (bh _ location), an offset address (bh _ location _ offset) of the picture storage location, and a picture name (bh _ name).
And the value of the image storage position identifier is an image storage path or a null value, and the null value represents that the image data is stored in the flash.
The structure of the picture compression file is shown as the following table:
the step S20 specifically includes:
step S21, the set top box positions a compressed file header based on the compressed file header identifier, reads the size of a compressed file packet from the compressed file header, judges whether the size of the compressed file packet is smaller than or equal to the size of a flash, and stores the picture compressed file into the flash if the size of the compressed file packet is smaller than or equal to the size of the flash; if not, go to step S22;
step S22, based on the size of the picture data in the picture data header, stripping the picture data exceeding the size of the flash and storing the picture data in other storage areas (other partitions or cache areas, other partitions occupy the memory space, and the cache area does not occupy the memory space), updating the picture storage location corresponding to the stripped picture data and the offset address of the picture storage location, and regenerating the picture compression file and storing the picture compression file in the flash. And searching the stripped picture data through the picture storage position and the offset address of the picture storage position when the stripped picture data is displayed at the later stage.
The step S30 specifically includes:
the set top box performs crc calculation on the compressed file packet body size of the compressed file packet head, the compressed file packet head identifier, the number of pictures and the picture compressed file name to obtain a first crc value;
performing crc calculation on the compressed file inclusion to obtain a second crc value;
judging whether the first reserved fixed value is equal to a first index value, the first crc value is equal to a header crc value of the compressed file, the second crc value is equal to a packet crc value of the compressed file and the number of pictures is greater than 0, if so, passing validity verification, and entering step S40; if not, the validity verification fails, and the process is ended.
The step S40 specifically includes:
the set top box reads a compressed file packet of the picture compressed file to further obtain picture data information;
the set top box performs crc calculation on the picture data size, the picture display duration, the picture format, the picture compression format, the picture storage position, the offset address of the picture storage position and the picture name of the picture data packet header of each piece of picture data information to obtain a third crc value;
performing crc calculation on the picture data of each picture data information to obtain a fourth crc value;
judging whether the first reserved fixed value is equal to the first index value, the third crc value is equal to the crc value of the picture data packet header and the fourth crc value is equal to the crc value of the picture data, if so, passing the validity verification, and entering the step S50; if not, the validity verification is not passed, and the validity verification is carried out on the next picture data information, namely the display flow of the next picture is entered when the validity verification is not passed.
The step S50 specifically includes:
step S51, the set top box judges whether the picture data are stored in the flash in sequence based on the picture storage position identifiers of the picture data headers, if so, the set top box enters step S52; if not, finding the corresponding picture data based on the picture storage position of the picture data packet header and the offset address of the picture storage position, and entering step S52;
step S52, decompressing the picture data based on the picture compression format;
step S53, decoding the decompressed picture data based on the picture format to obtain a picture, and setting a color mode for picture display;
step S54, the set-top box displays each picture in sequence based on the picture display duration when starting up;
step S55, judging whether all pictures are displayed based on the number of the pictures, if so, stopping displaying the pictures; if not, the process proceeds to step S51. The header of the compressed file is also provided with a current picture display number (pic _ header. bh _ indexer), and whether all pictures are displayed completely can be known by judging whether the current picture display number is equal to the number of the pictures.
In the step S53, the color mode is ARGB 8888; the display effect of ARGB8888 is clearer compared with that of ARGB 1555.
The structure of the picture compression file is further illustrated as follows:
1. the overall organization structure of the picture compression file is as follows:
2. header information structure of picture compression file:
3. compressed file packet header
packet _ header. BH _ mac ═ BH _ MAGIC; /fixed value
packet _ header. bh _ hcrc ═ crc (packet _ header not included bh _ mac and bh _ hcrc); /. bh _ crc is the crc value ` greater or greater for the remaining elements in the packet header after discarding bh _ magic and bh _ hcrc
Bh _ dcrc ═ crc (divided _ pics _ len + divided _ pics); /remove packet _ header the crc checksum of the entire packet +
packet _ header. bh _ size ═ size of (divided _ pics _ len + divided _ pics); /size of the entire packet after removing packet header >
packet _ header, bh _ INDEXER ═ BP _ index _ TOTAL; /' must be set to BP _ INDEXER _ TOTAL to indicate that this is the entire packet header, and the following packet header differentiation of picture data
Bh _ count is a count of divided _ pics; v. boot up the number of pictures contained in the current packet &
packet _ header. bh _ seconds ═ 0; /. for the entire packet header bh second is set to 0 @
packet_header.bh_type＝BP_INVALID；
packet _ header. bh _ COMP ═ BP _ COMP _ NON; v indicates whether there is compression, and we do not use compression for the entire packet because the following elements have been compressed
Bh _ location ═ 0 }; v reserved field +
packet _ header. bh _ location _ offset is 0; v reserved field +
packet _ header. bh _ name ═ bootpics. mbp "/. filename @ file name @
4. Picture data packet header
pic_header.bh_magic＝BH_MAGIC；
pic_header.bh_hcrc＝crc(packet_header not included bh_magic and bh_hcrc)；
pic_header.bh_dcrc＝crc(bootpic_data)；
pic_header.bh_size＝sizeof(bootpic_data)；
pic_header.bh_indexer＝BP_INDEXER_0；/*BP_INDEXER_1,BP_INDEXER_2...*/
pic_header.bh_count＝1；
pic _ header. bh _ seconds ═ 5; /. The time in seconds that the current picture needs to be displayed is: |, the current picture
pic _ header. bh _ type ═ BP _ BMP; v picture format, bmp, jpg, gif, etc.. s
pic _ header. bh _ type ═ BP _ COMP _ GZ; v. Picture compression Format
pic _ header. bh _ location ═ 0 }; if the current partition is not sufficient to store the picture, mtd partitions or file system picture paths may be set
pic _ header. bh _ location _ offset is 0; v put picture into mtd partition if set, set the corresponding offset in
pic_header.bh_name＝"bootpic0.bmp"；/*bootpic1.jpg or bootpic2.jpg and so on*/
In summary, the invention has the advantages that:
1. the size of the received picture compression file is verified, whether the size of the picture compression file exceeds the size of the flash is judged, if yes, the picture data exceeding the size of the flash is stripped and stored in other storage areas, the situation that the picture cannot be normally displayed due to insufficient storage space of the flash is avoided, and the situation that a set top box is halted and turned into a brick block due to the fact that the picture compression file is too large is also avoided; the pictures are compressed into picture data and stored in the picture compression file, so that the space occupied by the pictures is reduced, and more pictures can be stored; and to picture conversion color mode, the display effect is more clear, very big saving the memory space of picture promptly, very big promotion STB operating stability and picture display effect.
2. The integrity of the picture data is ensured by performing crc (cyclic redundancy check) on the compressed file packet header, the compressed file packet body, the picture data packet header and the picture data of the picture compressed file, so that a complete picture is decoded, if the crc of a certain picture fails, the next picture is directly displayed, and the picture display effect is further improved.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (4)
1. A picture display method for a set top box is characterized in that: the method comprises the following steps:
step S10, the set-top box receives the picture compression file to be displayed when the set-top box is started;
the image compressed file comprises a compressed file packet header and a compressed file packet body; the compressed file packet body comprises a plurality of pieces of picture data information; each piece of picture data information comprises a picture data packet header and picture data;
the compressed file packet header is provided with a first reserved fixed value, a first index value, a compressed file packet header crc value, a compressed file packet body size, a compressed file packet header identifier, the number of pictures and a picture compressed file name;
the picture data packet header is provided with a second reserved fixed value, a second index value, a picture data packet header crc value, a picture data size, a picture display duration, a picture format, a picture compression format, a picture storage position identifier, a picture storage position, an offset address of the picture storage position and a picture name;
step S20, after verifying the size of the picture compression file based on the size of the flash, the set-top box stores the picture compression file into the flash or other storage areas;
step S30, the set-top box verifies the validity of the stored picture compression file;
step S40, the set-top box verifies the validity of the compressed file packet of the picture compressed file;
step S50, the set-top box decompresses the compressed file packet to obtain a picture, and the picture is sequentially displayed based on the compressed file packet header and the picture data packet header of the picture compressed file;
the step S20 specifically includes:
step S21, the set top box positions a compressed file header based on the compressed file header identifier, reads the size of a compressed file packet from the compressed file header, judges whether the size of the compressed file packet is smaller than or equal to the size of a flash, and stores the picture compressed file into the flash if the size of the compressed file packet is smaller than or equal to the size of the flash; if not, go to step S22;
step S22, based on the size of the picture data packet header, stripping the picture data exceeding the size of the flash and storing the picture data into other storage areas, updating the picture storage position corresponding to the stripped picture data and the offset address of the picture storage position, regenerating a picture compression file and storing the picture compression file into the flash;
the step S30 specifically includes:
the set top box performs crc calculation on the compressed file packet body size of the compressed file packet head, the compressed file packet head identifier, the number of pictures and the picture compressed file name to obtain a first crc value;
performing crc calculation on the compressed file inclusion to obtain a second crc value;
judging whether the first reserved fixed value is equal to a first index value, the first crc value is equal to a header crc value of the compressed file, the second crc value is equal to a packet crc value of the compressed file and the number of pictures is greater than 0, if so, passing validity verification, and entering step S40; if not, the validity verification fails, and the process is ended;
the step S40 specifically includes:
the set top box reads a compressed file packet of the picture compressed file to further obtain picture data information;
the set top box performs crc calculation on the picture data size, the picture display duration, the picture format, the picture compression format, the picture storage position, the offset address of the picture storage position and the picture name of the picture data packet header of each piece of picture data information to obtain a third crc value;
performing crc calculation on the picture data of each picture data information to obtain a fourth crc value;
judging whether the second reserved fixed value is equal to the second index value, the third crc value is equal to the crc value of the picture data packet header and the fourth crc value is equal to the crc value of the picture data, if so, passing the validity verification, and entering the step S50; if not, the validity verification is not passed, and the validity verification is carried out on the next picture data information.
2. The set-top box picture display method of claim 1, wherein: and the value of the image storage position identifier is an image storage path or a null value, and the null value represents that the image data is stored in the flash.
3. The set-top box picture display method of claim 1, wherein: the step S50 specifically includes:
step S51, the set top box judges whether the picture data are stored in the flash in sequence based on the picture storage position identifiers of the picture data headers, if so, the set top box enters step S52; if not, finding the corresponding picture data based on the picture storage position of the picture data packet header and the offset address of the picture storage position, and entering step S52;
step S52, decompressing the picture data based on the picture compression format;
step S53, decoding the decompressed picture data based on the picture format to obtain a picture, and setting a color mode for picture display;
step S54, the set-top box displays each picture in sequence based on the picture display duration when starting up;
step S55, judging whether all pictures are displayed completely based on the number of the pictures, if so, stopping displaying the pictures; if not, the process proceeds to step S51.
4. The set-top box picture display method of claim 3, wherein: in step S53, the color mode is ARGB 8888.
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| CN101827199A (en) * | 2010-04-06 | 2010-09-08 | 福建新大陆通信科技有限公司 | Method for realizing startup picture change of set top box through external memory medium |
| CN102364956A (en) * | 2011-11-29 | 2012-02-29 | 乐视网信息技术（北京）股份有限公司 | Method for realizing advertising in starting of Internet protocol television (IPTV) system |
| CN104461916A (en) * | 2014-11-19 | 2015-03-25 | 福建新大陆通信科技股份有限公司 | Method and system for saving storage memory of pictures |
| CN105824673A (en) * | 2016-03-21 | 2016-08-03 | 乐视网信息技术（北京）股份有限公司 | Method and device for operating application program |
| CN105847907A (en) * | 2016-03-24 | 2016-08-10 | 广州视源电子科技股份有限公司 | Method and apparatus for changing boot animation of television set |
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