CN101331536A

CN101331536A - Signal processing device and optical disc device

Info

Publication number: CN101331536A
Application number: CNA2007800006538A
Authority: CN
Inventors: 石川忠义
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2006-01-17
Filing date: 2007-01-15
Publication date: 2008-12-24

Abstract

An inputted video signal is decoded by a video decoder (107) and video information is outputted. Moreover, a microcomputer (108) reads out only specified compressed font data from a ROM (104) containing compressed font data, successively decompresses the compressed font data which has been read out, and stores it in a RAM (105). Furthermore, the microcomputer (108) combines the decompressed font data to generate superposition information to be superposed on the video information and stores it in the RAM (105). A video synthesis unit (111) superposes the superposition information stored in the RAM (105) on the video information for output.

Description

Signal processing apparatus and optical disc apparatus

Technical field

The present invention relates to be used for the signal processing apparatus of the Flame Image Process of information such as display text in display frame, particularly relate to OSD (On Screen Display: the signal Processing device of usefulness screen display).

Background technology

In recent years, developed many large scale system LSI (Large Scale Integrated circuit: large scale integrated circuit), synchronous DRAM) as the peripheral LSI of this system LSI, flash memory (flash memory) that the software that is used for carrying out system's control is housed is installed, stores SDRAM (the Synchronous Dynamic RandomAccess Memory: jumbo storer such as of the data and the data processed result of needs in data processing successively.

This system also is widely used as sound and image processing apparatus.For example be suitable for use as and be used for that (Digital Versatile Disc: the sound/image information on the CD digital video disk) (content information) is reproduced the digital signal processing device of output, or is suitable for use as the signal processing apparatus that carries out the processing of various Word messages on picture as DVD to being recorded in.

Aforesaidly carry out technique for displaying on the reproduced image and be commonly referred to as OSD on the picture Word message being overlapped.As the example of the Word message that utilizes OSD to show, generate and content independently information and as the information that generates of the signal read from CD of indication basis from the information of the reproduction of content time that CD is read etc. and content-related information by system side like that just like the information of indication current time.

As utilizing OSD to carry out the picture device shown, for example, known be provided with kept character script group (font set) thus or as the demonstration material storer of the picture pattern of the material of display frame, constitute the device (for example with reference to patent documentation 1) that OSD shows the image of usefulness from showing that the material storer is read specific literal or picture pattern and made up.

The character script group of using in this device or the pattern of image need very big memory capacity.Therefore, the character script group after will compressing in advance in addition remains on ROM (Read OnlyMemory: ROM (read-only memory)), the data in the ROM are launched to wait the device (for example with reference to patent documentation 2) of the capacity that reduces ROM in use.

Patent documentation 1: TOHKEMY 2000-23061 communique

Patent documentation 2: TOHKEMY 2004-272090 communique

Summary of the invention

In recent years, in having the DVD player etc. of signal processing apparatus that OSD shows usefulness, have and show with the multilingual word information relates or with high gray scale display text information or increase the tendency of display text quantity by the height that increases display frame.Therefore, exist and to be used to carry out RAM (the RandomAccess Memory: the tendency that capacity random access memory) also increases that osd data amount that OSD shows increases, temporarily stores osd data.In addition, the character script group after will compressing remains in the device of ROM, in order to show osd data, must guarantee the expansion font storage area of the character font data after temporary transient storage launches fully in RAM.

On the other hand, because the propelling of the low price of DVD player etc., existence reduces the tendency of the RAM capacity of peripheral LSI.That is, although have the such problem of tendency that reduces memory span in order to carry out the capacity of the bigger RAM of more senior OSD demonstration needs, to have produced.

The present invention finishes in view of the above problems, its objective is provide a kind of can be with the time than the whole character script group of storage in RAM little RAM capacity suitably be used to overlap the signal processing apparatus of the information processing on the image information.

In order to solve above-mentioned problem, a mode of the present invention is, be used for predetermined information is overlapped the signal processing apparatus that is presented at the signal Processing in the display frame on the image information, it is characterized in that having: the picture signal of being imported is decoded and exported the Video Decoder of above-mentioned image information; Microcomputer, from the ROM (Read OnlyMemory) that stores the compressed font data, read specific compressed font data, the compressed font data of reading are launched to be stored among the RAM (Random Access Memory) after the processing successively, and the character font data that is stored among the above-mentioned RAM is made up, it is overlay information that generation is carried out overlapping information with above-mentioned image information, and is stored among the above-mentioned RAM; The overlay information and the above-mentioned image information that are stored among the above-mentioned RAM are carried out the synthetic handling part of overlapping image.

In addition, a mode of the present invention is characterized in that: in said signal processing device, the character font data that is stored in after the expansion among the above-mentioned RAM only is and the corresponding character font data of the demonstration needed lteral data of above-mentioned overlay information.

In addition, a mode of the present invention is characterized in that: in said signal processing device, the character font data that is stored in after the expansion among the above-mentioned RAM is the lteral data corresponding character font data high with usage frequency.

Thus, even reduce the capacity of RAM, also can suitably be used to overlap the information processing on the image information.

In addition, a mode of the present invention, it is characterized in that: in said signal processing device, after the compressed font data are launched to handle successively, do not store above-mentioned RAM into, but directly character font data is made up and generates the information that is used to overlap on the above-mentioned image information is overlay information, and it is stored among the above-mentioned RAM.

Thus, even reduce the font memory capacity of RAM, also can suitably be used to overlap the information processing on the image information.

In addition, a mode of the present invention is to be characterized as the optical disc apparatus with said signal processing device.

Thus, even reduce the capacity of RAM, also can constitute the optical disc apparatus that can suitably be used to overlap the information processing on the image information.

According to the present invention, only demonstration is used for overlapping the needed MIN character font data of information on the image information and launches and be stored in RAM and get final product, therefore can be with the time than the whole character script group of storage in RAM little RAM capacity suitably be used to overlap information processing on the image information.

Description of drawings

Fig. 1 is the block diagram of structure that the optical disc apparatus of signal processing apparatus of the present invention has been adopted in expression.

Fig. 2 is explanation will be stored in the action of compressed font data storage in the RAM in the ROM in embodiment 1 a process flow diagram.

Fig. 3 is that the VRAM data in the expression embodiment 1 generate the process flow diagram of handling.

Fig. 4 is explanation will be stored in the action of compressed font data storage in the RAM in the ROM in embodiment 2 a process flow diagram.

Fig. 5 is that the VRAM data in the expression embodiment 2 generate the process flow diagram of handling.

Fig. 6 is that the VRAM data in the expression embodiment 3 generate the process flow diagram of handling.

Symbol description:

100 optical disc apparatus

101 CDs

102 optical heads

103A/D conversion process portion

104ROM

104a compressed font storage area

105RAM

105a launches the font storage area

105b VRAM zone

106 system decodes

107 audio decoders

108 microcomputers

109 built-in RAMs

The 110DMA controller

111 images synthesize handling part

112D/A conversion process portion

113 show efferent

114 system LSIs

Embodiment

Below, with reference to accompanying drawing embodiments of the present invention are described.

" working of an invention mode 1 "

Fig. 1 is the block diagram of structure that the optical disc apparatus 100 of signal processing apparatus of the present invention has been adopted in expression.Optical disc apparatus 100 is to reproduce output and make information such as various Word messages and image information carry out device shown overlappingly being recorded in sound/image information (content information) on the CD.Below, information and image information will be shown overlappingly be called the OSD demonstration.And, as the information (overlay information) of carrying out the OSD demonstration literal, numeral or symbol etc. are arranged.

In Fig. 1, the 101st, record the CD of content informations such as sound/image.

The 102nd, be used for CD 101 irradiating lasers and receive the optical head (optical pickup) that its reflected light is converted to simulating signal.

The 103rd, be the A/D conversion process portion of digital signal with the analog signal conversion that generates by optical head 102.

The 104th, ROM (Read Only Memory).In ROM104, store the character font data after being compressed.

The 105th, RAM (Random Access Memory).RAM105 comprises the expansion font storage area 105a of the character font data (aftermentioned) after storage launches and the VRAM zone 105b (VRAM:Video RAM (video RAM)) of the data (being overlapped data) that storage OSD shows usefulness.

The 106th, the system decoder of abstract image signal, voice signal from the digital signal that generates by A/D conversion process portion 103.This system decoder 106 also carries out being recorded in the extraction of the such management information of reproduction of content start time (PTS) on the CD 101 or decode start time (DTS).

The 107th, to the Video Decoder of decoding by the image information of system decoder 106 extractions.

The 108th, the management information that basis is extracted by system decoder 106 etc. generates OSD and shows the microcomputer of output with data.Specifically, microcomputer 108 is stored in and launches font storage area 105a after OSD shows that output is with the required character font data of the generation of data reading from compressed font storage area 104a and launch.And then microcomputer 108 generates the data that OSD shows usefulness with reference to launching font storage area 105a.In addition, in the present embodiment, microcomputer 108 can be carried out the data storage processing faster speed with comparison ROM105 built-in RAM109 is carried out data storage processing.

The 109th, the OSD that storage is generated by microcomputer 108 shows the built-in RAM of output with data.

The 110th, control is carried out DMA (DirectMemory Access: the direct memory visit) transmit OSD and show the dma controller of output with data from built-in RAM 109 to VRAM zone 105b.

The 111st, the image that generates the numerical data that is used for showing in display frame synthesizes handling part.In detail, image synthesizes handling part 111, and the OSD that reads RAM105 shows that output carried out decoded image data with data with by Video Decoder 107, and OSD is shown that output exports after overlapping with data and view data.

The 112nd, be the D/A conversion process portion of simulating signal with the digital data conversion that generates by the synthetic handling part 111 of image.

The 113rd, the simulating signal that basis is generated by D/A conversion process portion 112 shows image on display (not shown) demonstration efferent.

In above-mentioned optical disc apparatus 100, by the synthetic handling part 111 construction system LSI114 of system decoder 106, Video Decoder 107, microcomputer 108, built-in RAM 109, dma controller 110 and image, other circuit exists as peripheral LSI.

Then, the OSD display message processing action of being undertaken by optical disc apparatus 100 is described.

Fig. 2 is that explanation shows OSD that required OSD display font is stored in the process flow diagram of the action among the expansion font storage area 105a in the RAM105 from the compressed font data that are stored in ROM104.

At first, microcomputer 108 according to the indication from the outside, is determined the whole osd datas (S201) that use in the OSD of 1 picture shows.

After determining osd data, read one (S202) in a plurality of compressed font corresponding the compressed font storage area 104a of microcomputer 108 in ROM104 with determined osd data.

108 pairs of compressed font of reading from ROM104 of microcomputer launch to handle (S203).

Then, microcomputer 108, after the character font data that will launch temporarily was stored in built-in RAM 109, control dma controller 110 was stored in it among the expansion font storage area 105a of RAM105 (S204).But, can not use dma controller yet and directly transmit by microcomputer.

Then, judge whether OSD to be shown that needed character font data has all carried out launching to handle.When all character font datas not being launched to handle, repeat the processing of S201～S204, carry out the expansion of compressed font data successively and handle.Then, end process (S205) when all character font datas having been carried out launch to handle.

Then, microcomputer 108 uses the character font data that is stored in expansion font storage area 105a to generate OSD demonstration data (VRAM data).Fig. 3 is that expression VRAM data generate the process flow diagram of handling.

At first, microcomputer 108 is read from launch font storage area 105a and is shown the needed character font data of osd data (S301).

Then, microcomputer 108 uses the character font data of reading to generate to be used for and carries out overlapping OSD with view data and show that output is with data (S302).

Then, microcomputer 108 OSD that will generate shows that output is with among the VRAM zone 105b of data storage in RAM105 (S303).

And then microcomputer 108 judges whether OSD to be shown that needed OSD shows that output all is sent to VRAM zone 105b with data.And, when all OSD not being shown that output is sent to VRAM zone 105b with data, repeat the processing of S301～S303, carry out the transmission of character font data successively and handle.In addition, when all character font datas having been carried out transmit processing, end process (S304).

In addition, by the information processing on CD 101 of optical head 102 and A/D conversion process portion 103 playback records, show that from the processing of wherein abstract image information or management information etc. and with OSD output with data and undertaken showing after decoded image data is overlapping that by Video Decoder 107 processing of output is a general common practise the prior art, omits its detailed explanation by system decoder 106.In addition, the processing of the voice signal that is extracted in system decoder 106 and the present invention directly do not concern, therefore omit explanation.

As mentioned above, according to present embodiment, only OSD is shown that needed MIN character font data launches and be stored among the RAM105 to get final product.Therefore, can carry out the OSD display process by little RAM capacity with than the whole character script group of storage in RAM the time.

" working of an invention mode 2 "

Below, embodiment 2 is described.The circuit structure of the device of embodiment 2 itself is identical with optical disc apparatus 100, but the action difference of microcomputer 108.

Fig. 4 is that explanation will be stored in the process flow diagram of the compressed font data storage of ROM104 to the action of the interior expansion font storage area 105a of RAM105.In the present embodiment, launch, be stored in and launch among the font storage area 105a behind the employed character font data of the high osd data of usage frequency.

At first, in the initialization process of microcomputer 108, determine the high osd data of usage frequency (S401).

After having determined the high osd data of usage frequency, read one (S402) in a plurality of compressed font data corresponding the compressed font storage area of microcomputer 108 in ROM104 with determined osd data.

The compressed font data that 108 pairs of microcomputers are read launch to handle (S403).

Then, microcomputer 108 is after the character font data that will launch temporarily is stored in built-in RAM 109, and control dma controller 110 is stored in it among the expansion font storage area 105a of RAM105 (S404).But, can not use dma controller yet and directly transmit by microcomputer.

Then, judge whether the character font data of having determined has all been carried out launching to handle.When all character font datas not being launched to handle, repeat the processing of S401～S404, carry out the expansion of compressed font data successively and handle.In addition, end process (S405) when all character font datas having been carried out launch to handle.

Then, microcomputer 108 uses and is stored in the character font data that launches font storage area 105a or compressed font storage area 104a, generates OSD and shows with data (VRAM data).Fig. 5 is that expression VRAM data generate the process flow diagram of handling.

At first, microcomputer 108 is obtained the osd data (S501) that shows as OSD.

The obtained osd data of microcomputer 108 judgements is present among the expansion font storage area 105a and still is present among the compressed font storage area 104a (S502).

When obtained osd data was present among the compressed font storage area 104a, microcomputer 108 was read the compressed font data (S503) that are present in compressed font storage area 104a.And then 108 pairs of compressed font data of reading from ROM104 of microcomputer launch to handle (S504).

In addition, when osd data was present among the expansion font storage area 105a, microcomputer 108 was read from launch font storage area 105a and is launched character font data (S505).

Then, microcomputer 108 uses the character font data that has launched to generate to be used for and carries out overlapping OSD with view data and show that output is with data (S506).Then, microcomputer 108 OSD that will generate shows that output is with among the VRAM zone 105b of data storage in RAM105 (S507).

Then, microcomputer 108 judges whether OSD to be shown that needed character font data all is sent to the VRAM zone.When all character font datas not being sent to the VRAM zone, repeat the processing of S501～S507, carry out the transmission of character font data successively and handle.In addition, when all character font datas having been carried out transmit processing, end process (S508).

In addition, by the information processing on CD 101 of optical head 102 and A/D conversion process portion 103 playback records, show that from the processing of wherein abstract image information or management information etc. and with OSD output is with data and undertaken showing after decoded image data is overlapping that by Video Decoder 107 processing of output is a general common practise the prior art by system decoder 106, identical with embodiment 1, omit its detailed explanation.

As mentioned above, according to present embodiment, only show the needed MIN character font data from OSD the character font data corresponding with the high osd data of usage frequency launched and store among the RAM105 to get final product.Therefore, can carry out the OSD display process by little RAM capacity with than the whole character script group of storage in RAM the time.

" working of an invention mode 3 "

Below, embodiment 3 is described.The circuit structure of the device of embodiment 3 itself is identical with optical disc apparatus 100, but does not use the expansion font storage area 105a in the RAM105.And, the action difference of microcomputer 108.

To be expression generate the VRAM data that are used for carrying out overlapping OSD video data with image information and are stored in the VRAM zone in the 105b of VRAM zone according to the compressed font data that are stored in ROM104 to Fig. 6 generates the process flow diagram of handling.

At first, microcomputer 108 is according to the indication from the outside, determines to be presented at osd data (S601) in the display frame with OSD.After having determined osd data, the compressed font storage area of microcomputer 108 in ROM104 read (S602) a plurality of compressed font corresponding with determined osd data.108 pairs of compressed font of reading from ROM104 of microcomputer launch to handle (S603).

Herein, in the present embodiment, the compressed font that microcomputer 108 will not carry out launching handling stores RAM105 into but keeps.As the method that keeps, can consider temporarily to be kept at the method in the register that is had in the microcomputer 108.Then, microcomputer 108 generates the character font data and the image information that are used for having launched and carries out overlapping OSD video data (S604).Then, microcomputer 108 control dma controllers 110 are stored in the OSD video data that has generated in the VRAM zone in the RAM105 (S605).But, can not use dma controller yet and directly transmit by microcomputer.Then, judge whether OSD to be shown that needed character font data has all carried out launching to handle, when all character font datas not being launched to handle, repeat the processing of S601～S605, carry out the expansion of compressed font data successively and handle end process (S606) when all character font datas having been carried out launch to handle.

By aforesaid processing,,, therefore need in RAM105, not guarantee to launch font storage area 105a because the expansion character font data that microcomputer 108 will not carry out launching to handle stores RAM105 into according to present embodiment.Therefore, even in the little system of the capacity of RAM, also can carry out H.D OSD display process.

In addition, in the explanation of each above-mentioned embodiment, constituted system LSI 114 by the synthetic handling part 111 of system decoder 106, Video Decoder 107, microcomputer 108, built-in RAM 109, dma controller 110 and image, but the present invention may not be defined in this structure in order to obtain its technique effect.For example, in system LSI 114, be equipped with under the situations such as A/D conversion process portion 103, ROM104, RAM105, D/A conversion process portion 112, also can obtain identical technique effect.

In addition, as ROM104, preferably adopt flash ROM (flash ROM) as rewritable nonvolatile memory.As RAM105, preferably adopt lower-cost SDRAM.

In addition, in the respective embodiments described above, illustrated signal processing apparatus of the present invention is applied to optical disc apparatus, but also can be applied to the broadcast receiver as televisor.In this case, take from the electric wave of being play, behind the abstract image signal Word message etc. to be carried out overlapping mode with picture signal.

Utilizability on the industry

Signal processing apparatus of the present invention only will show for the information that overlaps on the image information required Be stored among the RAM after the MIN character font data of wanting launches and get final product. Therefore, have Such effect: can be with RAM capacity little when storing up whole character script group at memory ram Suitably carry out be used to the processing that overlaps the information on the image information. Therefore, as using Signal processing apparatus of processing in the image of the information such as display text in display frame etc., particularly The signal processing of using as OSD is useful with device.

Claims

1. a signal processing apparatus is used for predetermined information is overlapped the signal Processing that is presented on the image information in the display frame,

This signal processing apparatus is characterised in that, comprising:

The picture signal of being imported is decoded and exported the Video Decoder of above-mentioned image information;

Microcomputer, from the ROM that stores the compressed font data, read specific compressed font data, and after the compressed font data of reading are launched to handle successively, it is stored among the RAM, and to being stored in that character font data among the above-mentioned RAM makes up and generate the information that is used to overlap on the above-mentioned image information is overlay information, and it is stored among the above-mentioned RAM; And

The image that the overlay information that is stored among the above-mentioned RAM is overlapped on the above-mentioned image information synthesizes handling part.

2. signal processing apparatus according to claim 1 is characterized in that:

The character font data that is stored in after being unfolded among the above-mentioned RAM only is and the corresponding character font data of the demonstration needed lteral data of above-mentioned overlay information.

3. signal processing apparatus according to claim 1 is characterized in that:

The character font data that is stored in after being unfolded among the above-mentioned RAM is the lteral data corresponding character font data high with usage frequency.

4. a signal processing apparatus is used for predetermined information is overlapped the signal Processing that is presented on the image information in the display frame,

This signal processing apparatus is characterised in that, comprising:

The picture intelligence of being imported is decoded and exported the Video Decoder of above-mentioned image information;

Microcomputer, from the ROM that stores the compressed font data, read the font information after being compressed of a plurality of needs, and the above-mentioned font information after above-mentioned a plurality of being compressed of reading is launched to handle successively, the a plurality of above-mentioned font information that has carried out launching to handle is made up and after generating information on the image information that is used to overlap above-mentioned Video Decoder output, it is stored among the above-mentioned RAM; And

With the synthetic handling part of the image of information overlap on the image information of above-mentioned Video Decoder output that is stored among the above-mentioned RAM.

5. optical disc apparatus is characterized in that:

Signal processing apparatus with claim 1.

6. optical disc apparatus is characterized in that:

Signal processing apparatus with claim 4.