WO2009135401A1

WO2009135401A1 - Set-top-box standby and wake-up method and the set-top box thereof

Info

Publication number: WO2009135401A1
Application number: PCT/CN2009/071230
Authority: WO
Inventors: 叶云杰
Original assignee: 华为技术有限公司
Priority date: 2008-05-06
Filing date: 2009-04-10
Publication date: 2009-11-12
Also published as: CN101282431A; CN101282431B

Abstract

A set-top-box standby method, a set-top-box wake-up method and the set-top-box thereof are disclosed in the embodiments of the present invention. The set-top-box standby method includes the steps of: after receiving the standby signal, turning off the power supply of the output unit; turning off the power supply of the signal processing unit; turning off the power supply of the input unit; indicating the memory unit to enter the low power state; indicating the central processing unit to enter the low power state. By applying the embodiments of the present invention, when a set-top-box is in a standby mode, it is determined to turn off the power supply or to enter the low power state according to the characteristics of different functional units, so that the set-top-box can be woke up quickly, as well as consume lower power in a standby mode.

Description

Set-top box standby, wake-up method and set-top box

The present invention relates to the field of electronic technologies, and in particular, to a set top box standby method, a set top box wake-up method, and a set top box. Background technique

On the one hand, with the development of digital satellite TV, digital terrestrial TV and digital cable TV, a huge market demand for set-top boxes has been formed. On the other hand, with the increasing global energy, the global energy-saving voice is rising, countries have begun to pay attention to Energy saving issues. How to realize the power saving of the set-top box and the low power consumption during standby are the main concerns of the industry at present.

In the prior art, the technical solution for implementing the set-top box standby is that the power module of the set-top box directly supplies power to each power module, and all modules are still in the power supply state during standby, and only the video output is prohibited.

The power consumed by the box in standby is substantially equivalent to the power consumption during normal operation. Since hundreds of millions of set-top boxes have been in a false standby state for a long time, it will cause a large waste of energy.

In the prior art 2, when the set top box is in the standby state, all modules except the infrared receiving head and the central processing unit are turned off. In this way, only the infrared receiver and the central processing unit consume power.

After the box is in standby, it is necessary to reload the parameter settings of each module of the software system and the set-top box when the system wakes up, which requires a long restart time, so the wake-up speed is slow.

Summary of the invention

An embodiment of the present invention aims to provide a set top box standby method, a set top box wake-up method, and a set top box, so that the set top box can maintain low power consumption during standby and wake up more quickly.

In order to achieve the above objective, the embodiment of the present invention is implemented by the following technical solutions: A set top box includes: An input unit, configured to receive a multimedia signal; a signal processing unit, configured to process the multimedia signal; a storage unit, configured to store the multimedia signal and a program required for operation of the set top box system; and an output unit, configured to output the a multimedia signal processed by the signal processing unit; a central processing unit for coordinating the normal operation of the other units;

a standby processing unit, configured to: turn off the power of the output unit after receiving the standby signal; turn off the power of the signal processing unit; turn off the power of the input unit; turn the instruction storage unit into a low power state; and instruct the central processing unit to switch to low power Consumption state; or

For receiving the wake-up signal, instructing the central processing unit to transition from the low-power state to the normal working state; the instruction storage unit transitioning from the low-power state to the normal working state; turning on the power of the output unit; turning on the power of the signal processing unit ; Turn on the power to the input unit.

A set top box standby method, the set top box includes: an input unit, configured to receive a multimedia signal; a signal processing unit, configured to process the received multimedia signal; and a storage unit configured to store the multimedia signal and system software of the set top box; An output unit for outputting a multimedia signal; a central processing unit for coordinating work of other units;

The set top box standby method includes:

After receiving the standby signal,

Turn off the power of the output unit;

Turn off the power of the signal processing unit;

Turn off the power of the input unit;

The instruction memory unit is transferred to a low power state;

The central processing unit is instructed to transition to a low power state.

A set top box waking method, the set top box includes: an input unit, configured to receive a multimedia signal; a signal processing unit, configured to process the received multimedia signal; and a storage unit configured to store the multimedia signal and the set top box system required for operation Program; output unit for outputting multimedia signals; central processing unit for coordinating the work of other units;

The set top box wakeup method includes: After receiving the wake-up signal,

Instructing the central processing unit to transition from a low power state to a normal operating state;

The instruction memory unit transitions from a low power state to a normal operating state;

Turn on the power of the output unit;

Turn on the power of the signal processing unit;

Turn on the power of the input unit.

According to the foregoing technical solution provided by the embodiment of the present invention, when the set-top box is in standby, it is determined whether the power is turned off or the low-power state is enabled according to the characteristics of different functional units, so that the set-top box can wake up quickly and remain in standby after standby. Lower power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a set top box according to an embodiment of the present invention; FIG. 2 is a schematic structural view of a set top box according to still another embodiment of the present invention; FIG. 3 is a structure of a set top box according to still another embodiment of the present invention; Schematic diagram

4 is a schematic structural diagram of a DVB-C set-top box according to still another embodiment of the present invention; FIG. 5 is a schematic flowchart of a standby method of a set-top box according to another embodiment of the present invention; FIG. 6 is a wake-up of a set-top box according to still another embodiment of the present invention; FIG. 7 is a schematic flowchart of an application example of using a software to implement standby and wake-up of a set-top box according to another embodiment of the present invention.

detailed description

In the embodiment of the present invention, when the set-top box is in standby, it is determined whether the power is turned off or the low-power state is enabled according to the characteristics of different functional modules, so that the set-top box can quickly wake up and maintain low power consumption during standby.

FIG. 1 is a schematic structural diagram of a set top box according to an embodiment of the present invention. In this embodiment, a set top box includes an input unit 01 for receiving a multimedia signal, and a signal processing unit 102 for processing a received multimedia signal. Required for storing multimedia signals and set-top box systems a program; an output unit 103, configured to output a multimedia signal; a central processing unit 105 for coordinating the work of other units;

A standby processing unit 106 is further configured to: after receiving the standby signal, turn off the power of the output unit 103; turn off the power of the signal processing unit 102; turn off the power of the input unit 101; and the instruction storage unit 104 transitions to a low power consumption state; Instructing the central processing unit 105 to transition to a low power state; or

After receiving the wake-up signal, after receiving the wake-up signal, the instruction central processing unit 105 shifts from the low power consumption state to the normal working state; the instruction storage unit 104 transitions from the low power consumption state to the normal working state; Power; turns on the power of the signal processing unit 102; turns on the power of the input unit 101.

In this embodiment, when the set top box is in standby, the input unit 101, the signal processing unit 102, and the output unit 103 may not work, so the input unit 101 may be completely interrupted during standby, and the signal processing unit is clear, and the power supply unit of each unit of the set top box is not provided. It is shown in the drawings, but it is convenient for the person skilled in the art to describe. The embodiment of the present invention is called a power supply for turning off the input unit 101, the signal processing unit 102 and the output unit 103, and a similar expression will be used later. In order for the set top box to wake up quickly upon receipt of the wake-up signal, the memory unit 104 and the central processing unit 105 can enter a low power state in which the memory unit 104 and the central processing unit 105 are in a power saving mode. The standby processing unit 106 needs to maintain a power state to handle standby or wake events.

2 is a schematic structural diagram of a set-top box according to another embodiment of the present invention. An external control unit 107 is added to the set-top box shown in FIG. 1 for sending a control signal to the standby processing unit 106, including a standby signal and a wake-up signal. The external control unit 107 can be an infrared remote control, a keyboard, a mouse, a touch screen or the like. The external control unit 107 can always be powered so that a standby or wake-up signal can be issued at any time. The other units are the same as the previous embodiment.

Referring to FIG. 3, FIG. 3 is a schematic structural diagram of a set top box according to another embodiment of the present invention. The timing unit 108 is added to the set top box shown in FIG. 1 for timing, and is scheduled to arrive at a predetermined time. When it is time, the first internal clock interrupt signal is generated as a standby signal or a second internal clock interrupt signal is generated as a wake-up signal, and the standby signal or wake-up signal is sent to the standby processing unit 106. The user can set a specific time, and the set-top box automatically stands by when the time comes, and automatically wakes up after standby. After the user sets the time, the timing unit 108 starts timing, and sends a standby signal or wake-up signal to the standby processing unit 106 when the time specified by the user arrives. After receiving the standby signal or the wake-up signal, the standby processing unit 106 starts the corresponding standby or Wake up function.

The above-mentioned standby processing unit 106 or timing unit 108 may be integrated with the central processing unit (CPU) in actual operation; or the corresponding processing function may be performed by the central processing unit 105. The set top box according to the embodiment of the present invention may be a combination of one or more of a satellite digital television set top box (DVB-S), a terrestrial digital television set top box (DVB-T), and a digital cable set top box (DVB-C).

FIG. 4 is a schematic structural diagram of a DVB-C set top box according to still another embodiment of the present invention, and is an application embodiment of the set top box shown in FIG. 2.

Referring to FIG. 4 together, the input unit 101 of the set top box in this embodiment includes a tuning and demodulator. Since the channel coding of DVB is based on RS (Reed-Solomon) code convolutional interleaving, the modulation uses 64QAM (Quadature Amplitude Modulation), so the set-top box tuner and demodulator must complete QAM. The process of demodulation, RS decoding and deinterleaving (error correction processing), after QAM demodulation and channel decoding, the signal is sent to the lower module for demultiplexing in the form of a transport stream (TS stream).

The signal processing unit 102 includes a demultiplexer, a decoder, a video encoder, and an audio digital to analog conversion (D/A) module. The demultiplexer receives the transport stream data, demultiplexes the data, forms audio PES (Pro Evolution Soccer) format data and video PES format data, and directly sends the audio PES data and the video PES data to the decoder for decoding. The decoder outputs two sets of signals, one for the digital video signal sent to the video encoder and the other for the digital audio signal in the PCM (Pulse Code Modulation) format for audio digital-to-analog conversion. The central processing unit 105 extracts the decoded audio PES data and video PES data and sends them to the video encoder and the audio digital model. Piece. The video encoder converts the decoded digital signals into analog television signals that are sent to the A/V jack of the television for playback via a video filtering unit. The audio digital-to-analog conversion module converts the decoded digital PCM data into a stereo analog signal, and is amplified by the audio amplification unit to be output to the audio interface of the television.

The output unit 103 includes the above-mentioned video filtering unit and audio amplifying unit. The video filtering unit performs filtering processing on the analog television signal obtained by the video encoder, and the audio amplifying unit amplifies and outputs the stereo analog signal obtained by the audio analog-to-digital conversion module. The storage unit 104 includes a random access memory RAM, a read only memory ROM, and a nonvolatile memory for providing storage space required for the operation of the set top box system and for storing multimedia signals; and an external control unit 107 for implementing the set top box Control, such as issuing a standby or wake-up signal.

The standby processing unit 106 is configured to: after receiving the standby signal sent by the external control unit 107, turn off the power of each device in the output unit 103, turn off the power of each device in the signal processing unit 102, and turn off the devices in the input unit 101. The power supply, the memory devices in the instruction storage unit 104 are transferred to a low power state, and the central processing unit 105 is instructed to transition to a low power state; or

After receiving the wake-up signal sent by the external control unit 107, the central processing unit 105 is instructed to transition from the low power consumption state to the normal working state; the memory in the instruction storage unit 104 is transferred from the low power consumption state to the normal working state; The power of each device in the output unit 103 is turned on; the power of each device in the signal processing unit 102 is turned on; and the power of the input unit 101 is turned on.

The set-top box provided by the embodiment of the present invention can determine whether to turn off the power or enter a low-power state according to the characteristics of different functional modules during standby, so that the set-top box can quickly wake up and keep the standby time low. The power consumption, the set-top box has the following advantages:

(1) Energy saving and consumption reduction, the present invention can greatly reduce the power consumption during standby while maintaining a relatively fast restart, and thus can achieve a good energy saving effect.

(2) Low fever and low radiation. This is also because most of the power-consuming devices and modules in the set-top box are turned off during standby, and power consumption is reduced, so that heat generation is reduced and radiation is reduced. (3) Improve the expected service life of the device and the whole machine. Since most of the devices are in an unpowered state during standby, the losses of the devices and function blocks are reduced, thereby increasing the expected lifetime of the device.

FIG. 5 is a schematic flowchart of a standby method of a set top box according to another embodiment of the present invention. In this embodiment, the set top box includes an input unit 101, a signal processing unit 102, an output unit 103, a central processing unit 105, and a storage unit 104, and functions of the unit modules. Like the set top box shown in Figure 1, the set top box standby method includes:

501, receiving a standby signal;

The standby signal here may be an internal signal of the set top box such as an internal clock interrupt signal or an external control signal. The internal clock interrupt signal can realize the function of timed standby, that is, the user can set a predetermined time for the set top box, and when the predetermined time comes, the clock interrupt signal is generated inside the set top box as a standby signal. The external control signal is, for example, an infrared control signal sent by the set top box remote controller or a standby control signal sent by a keyboard, a mouse, a touch screen, etc., or a network signal, for example, sending a data packet through the network to implement a standby command, and the set top box supports at this time. Internet access function; The external control signal can also be a digital wired remote control signal.

502. Turn off the power of the output unit 103.

The output unit 103 here is for outputting a multimedia signal, such as a video signal, an audio signal. Since the output unit 103 does not need to operate during standby, the power supply to the output unit 103 can be stopped, and the output unit 103 stops outputting the multimedia signal to save power consumption during standby.

503. Turn off the power of the signal processing unit 102.

The signal processing unit 102 is configured to process the multimedia signal received by the set top box, for example, processing the received multimedia signal, and then outputting, for example, demodulating and decoding the video signal, performing digital-to-analog conversion on the audio signal, and the like. At the time of standby, the signal processing unit 102 may not operate, and thus the power of the signal processing unit 102 may be completely turned off (i.e., the electrical connection between the signal processing unit 102 and the corresponding power source is interrupted) to save power consumption during standby.

504. Turn off the power of the input unit 101.

While in standby, the set top box can not receive signals, so the power of the input unit 101 can also be completed. Fully off to save power consumption during standby.

505, the instruction storage unit 104 is transferred to a low power consumption state, and the storage unit 104 is configured to store the multimedia signal and the system software of the set top box, and provide the storage space required for the set top box to operate;

Since the storage unit 104 stores the system software of the organic top box, if the power is completely turned off, the startup time will be increased when the wakeup is required, so in order to be able to wake up quickly, the storage unit 104 can enter a low power state so that it can be quickly awake. Load the system.

506. The instruction central processing unit 105 transitions to a low power consumption state, and the central processing unit 105 is configured to coordinate the work of other various units.

In standby mode, after the central processing unit 105 coordinates the operation of each unit, it also enters a low power state to further save power.

It can be seen that the first embodiment of the present invention provides a set-top box standby method. In standby mode, each unit is powered off according to different functions of each unit, thereby minimizing power consumption during standby, achieving energy saving, and controlling access to the storage unit 104. Low-power state, the ability to quickly load the system when wake-up is required, maintaining a faster wake-up time.

Referring to FIG. 6, FIG. 6 is a schematic diagram of a method for waking up a set top box according to another embodiment of the present invention, corresponding to the standby method of the set top box shown in FIG. 5. The set top box wakeup method includes:

601. Receive a wake-up signal.

The wake-up signal here may be an internal signal of the set top box such as an internal clock interrupt signal or an external control signal. The internal clock interrupt signal can realize the function of timed wake-up, that is, the user can set a predetermined time for the set-top box, and when the predetermined time comes, the clock interrupt signal is generated inside the set-top box as a wake-up signal. The external control signal is, for example, an infrared control signal sent by the set-top box remote controller or a standby control signal sent by a keyboard, a mouse, a touch screen, etc., or a network signal, for example, sending a data packet through the network to implement a wake-up command, and the set-top box support at this time Internet access function; The external control signal can also be a digital wired remote control signal.

602. The instruction central processing unit 105 transitions from a low power consumption state to a normal working state.

After receiving the wake-up signal, the central processing unit 105 first needs to go from a low power state to a normal state. Work status to coordinate the work of other units.

603. The instruction storage unit 104 transitions from a low power consumption state to a normal working state.

The central processing unit 105 needs to load the system from the storage unit 104, so the storage unit 104 needs to go from a low power state to a normal state for storing the received multimedia signals and providing the necessary storage space during system operation.

604. Turn on the power of the output unit 103.

In order to enable the user to see the TV picture after waking up, the output unit 103 of the set top box needs to be turned on to output a multimedia signal for display.

605. Turn on the power of the signal processing unit 102.

The power of the signal processing unit 102 is turned on, so that the signal processing unit 102 can continue to process the multimedia signal for supply to the output unit 103.

606. Turn on the power of the input unit 101.

The power of the input unit 101 is turned on to receive multimedia signals such as television programs, and sent to the signal processing unit 1 G2 for processing.

It can be seen that the set-top box wake-up method provided by the embodiment of the present invention separately turns on the power of some units according to different functions of the respective units, controls the storage unit 104 to go into a normal working state, and can quickly load the system to maintain a faster wake-up time.

Still another embodiment of the present invention provides a specific application example of a set top box standby method which can be implemented on the D VB-C set top box shown in FIG. The standby method includes:

(1) receiving a standby signal;

(2) Turn off the power of the demultiplexer, decoder, video encoder, audio D/A unit, tuning and demodulator, video filter, audio amplifier, buttons and display panel, smart card module;

In standby mode, the above functional modules do not need to work, and the power can be completely turned off. In addition, the power of the peripheral discrete devices can also be turned off, such as LED indicators. The order of turning off the power is not limited. (3) Random access memory RAM, non-volatile memory, read-only memory ROM, and CPU all enter a low power state. RAM is a necessary part of the set-top box system operation, can not turn off the power, but can enter a low-power state, for example, can control the SDRAM into self-refresh (self refresh state), then only about 2mA current. It can keep data and consume low power. Non-volatile memory, such as FLASHR0M, can enter standby mode. The current in this mode is only about 5uA, and the power can be completely turned off. The read-only memory such as EEPR0M enters the standby state, and the current in this mode is only about 5uA, which can save power consumption during standby, and can also completely turn off the power. Usually the CPU is logically optimized and has its own standby state. The CPU is also in the standby state when it enters standby mode.

(4) The IR infrared receiving head maintains the power supply state to receive an external wake-up signal from the remote controller. The corresponding wake-up methods include:

(1) receiving a wake-up signal;

(2) The CPU, the memory SDRAM, the memory flash, and the memory EEPR0M are transferred from the low power state to the normal working state; if the memory flash or the memory EEPR0M is powered off during standby, the power of the memory flash or the memory EEPR0M is turned on at this time. .

(3) Turn on the power of the demultiplexer, decoder, video encoder, audio D/A unit, tuning and demodulator, video filter, audio amplifier, buttons and display panel, and smart card module. The order in which the power is turned on is not limited.

(4) The IR infrared receiving head maintains the power supply state to receive the external standby signal from the remote controller. The above takes the DVB-C set-top box as an example. If it is a DVB-S set-top box, you can replace the DVB-C set-top box's incoming line, tuning and demodulator with the corresponding DVB-S antenna, DVB-S tuning and demodulator. The standby and wake-up methods are the same as before, so I won't go into details here. Similarly, if it is an IPTV set-top box, it is sufficient to replace the DVB-C set-top box's drop line, tuning and demodulator with the corresponding IPTV cable, IPTV tuner and demodulator. The set-top box standby method and the wake-up method provided by the embodiments of the present invention can be used for other various set-top boxes and multimedia processing devices that require standby low-power processing, in addition to the above DVB-C, DVB-S, and IPTV set-top boxes, including However, it is not limited to power equipment such as game set-top boxes and mobile TVs. The above set-top box standby/wake-up method can be implemented by writing software code, which can be stored in a computer-executable non-volatile storage medium such as CDR0M, hard disk.

The above set-top box standby/wake-up method can also be implemented by a hardware circuit. In the standby mode, the power supply of each functional unit can be turned off by the M0SFET (Metal Oxide Semiconductor Field Effect Transistor), so that the corresponding branch of the power supply does not consume power or consume less power during standby. For example, you can use ^{RDS (.} ^N)

A low on-resistance M0STFET prevents excessive voltage drop across the MOSFET when passing large currents. The voltage of the control gate can control the turn-on and turn-off of the source and drain branches of the MOSFET, and control all the power supplies of the drain branch to be turned on or off.

Referring to FIG. 7 , FIG. 7 is a schematic flowchart of an application example of implementing set-top box standby and wake-up using software according to another embodiment of the present invention. The method for standby and wake-up of a set-top box in this embodiment includes the following steps:

701. After receiving the standby signal, save the current frequency point, close the video module, and close the audio module. The video module herein may be a unit for processing a video signal, such as a demultiplexer, a decoder, a video encoder, a video filtering unit, etc. in the set top box shown in FIG. 4, and the audio module includes an audio digital to analog conversion unit and an audio amplification unit. The unit used to process the audio signal.

702. Turn off the power of the tuning module and turn off the LED module. The tuning module includes a tuning and demodulator. Steps 701 and 702 specifically include: after receiving the standby signal, saving the current frequency point, stopping the video display, clearing the video memory, turning off the video module, turning off the audio module, turning off the power of the tuning module, and turning off the led module;

703. The instruction memory enters a low power state, and the central processor enters a standby mode and waits for a wake-up signal;

704. After receiving the wake-up signal, enable the power of the tuning module, lock the tuning module according to the saved lock point, and enable the led module;

Steps 703 and 704 specifically include: saving a current program status register flag; setting a current program status register flag to disable an interrupt response; and saving an enable interrupt register of the vector interrupt controller The enable interrupt register of the vector interrupt controller is set to enable only infrared, real-time clock or key interrupt; to determine whether the advanced high-performance bus is idle:

If it is not idle, continue to wait for the advanced high performance bus to be idle; if it is idle, continue with the following operations:

Setting the system controller of the central processor to enter standby mode;

Setting the synchronous dynamic memory to enter the self-refresh mode;

Calling the wait interrupt instruction to stop the central processing from running;

Determine if there is an infrared, real-time clock, and key interrupt:

If there is no interruption, continue to wait for the infrared, real-time clock and key interrupt to occur; if the interrupt occurs, put the central processor into normal operation mode, continue to do the following:

Set the synchronous dynamic memory to enter the normal working mode;

The enable interrupt register flag of the recovery vector interrupt controller;

Restore the current program status register flag;

705. Enable the audio module and enable the video module.

Step 705 specifically includes: enabling the led module; enabling the tuner module power; locking the frequency point; enabling the video module; enabling the audio module.

The set-top box standby method, the set-top box wake-up method, and the set-top box provided by the embodiment of the present invention determine whether the power is turned off or the low-power state is enabled according to the characteristics of different functional modules when the set-top box is in standby, so that the set-top box can quickly wake up. , and can maintain low power consumption during standby, which has the following beneficial effects:

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a The terminal device (which may be a cell phone, a personal computer, a server, or a network device, etc.) performs the methods described in various embodiments of the present invention.

The above is only an enumeration of the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Replacement or equivalent should be covered by the scope of the present invention.

Claims

Claim

A set top box, comprising:

An input unit, configured to receive a multimedia signal; a signal processing unit, configured to process the multimedia signal; a storage unit, configured to store the multimedia signal and a program required for operation of the set top box system; and an output unit, configured to output the a multimedia signal processed by the signal processing unit; a central processing unit for coordinating the normal operation of the other units;

2. The set top box of claim 1, further comprising:

And an external control unit, configured to send an external control signal to the standby processing unit, where the external control signal includes the standby signal or the wake-up signal.

The set top box according to claim 1, further comprising:

a timing unit, configured to time and generate a first internal clock interrupt signal as the standby signal or generate a second internal clock interrupt signal as the wake-up signal when the predetermined time comes, and the standby signal or the wake-up signal A signal is sent to the standby processing unit.

The set top box according to any one of claims 1 to 3, characterized in that

The input unit includes: a tuning and demodulator, configured to receive a multimedia signal, and perform demodulation and channel decoding on the received multimedia signal to obtain transport stream data;

The signal processing unit includes a demultiplexer, a decoder, a video encoder, and an audio digital-to-analog conversion module. The demultiplexer receives the transport stream data, demultiplexes the data, and forms audio data and video data, and The audio and video data are sent to the decoder for decoding, and the decoder outputs two sets of signals, one set is a digital video signal sent to the video encoder, and the other set is a pulse code modulation record sent to the audio digital-to-analog conversion. In the PCM format digital audio signal, the central processing unit extracts the decoded audio data and video data and sends them to the video encoder and the audio digital-to-analog module, and the video encoder converts the decoded digital signal into an analog television signal, the audio mode. The number conversion module converts the decoded digital PCM data into a stereo analog signal;

The output unit includes a video filtering unit and an audio amplifying unit. The video filtering unit performs filtering processing on the analog television signal obtained by the video encoder, and the audio amplifying unit amplifies and outputs the stereo analog signal obtained by the audio analog-to-digital conversion module.

The storage unit includes a random access memory, a read only memory, and a non-volatile memory, and the storage unit is configured to provide a storage space required for the set top box system to operate and to store multimedia signals.

A set-top box standby method, the set-top box includes: an input unit, configured to receive a multimedia signal; a signal processing unit, configured to process the received multimedia signal; and a storage unit configured to store the multimedia signal and the The system software of the set top box; the output unit for outputting the multimedia signal; the central processing unit for coordinating the work of the other units;

The set top box standby method includes:

After receiving the standby signal,

Turn off the power of the output unit;

Turn off the power of the signal processing unit;

Turn off the power of the input unit;

The instruction memory unit is transferred to a low power state;

The central processing unit is instructed to transition to a low power state.

The set-top box standby method according to claim 5, wherein the standby signal is an internal clock interrupt signal, and the set-top box standby method comprises:

When the predetermined time comes, the internal clock interrupt signal is generated as an interrupt signal.

The set-top box standby method according to claim 5, wherein the instructing the storage unit to enter a low power consumption state comprises:

If the storage unit includes a random access memory, instructing the random access memory to enter a self-refresh state; or

If the storage unit includes a non-volatile memory, instructing the non-volatile memory to enter a standby state or power off the non-volatile memory; or

If the storage unit includes a read only memory, the read only memory is controlled to enter a standby state or to turn off the power of the read only memory.

The set-top box standby method according to any one of claims 5 to 7, wherein the standby signal comprises an external control signal, and the external control signal comprises: an infrared remote control signal, a button signal, and a remote network standby Signal or closed route remote control signal.

A set top box waking method, the set top box comprising: an input unit, configured to receive a multimedia signal; a signal processing unit, configured to process the received multimedia signal; and a storage unit configured to store the multimedia signal and the The program required for the operation of the set top box system; the output unit for outputting multimedia signals; and the central processing unit for coordinating the work of other units;

The set top box wakeup method includes:

After receiving the wake-up signal,

Turn on the power of the output unit;

Turn on the power of the signal processing unit;

Turn on the power of the input unit.

The set-top box wake-up method according to claim 9, wherein the wake-up signal is an internal clock interrupt signal, and the set-top box wake-up method includes:

When the predetermined time comes, the internal clock interrupt signal is generated as a wake-up signal.