4K 串流寬頻需求 | 4K Streaming Broadband Requirements

4K 串流真正需要幾多頻寬？ | How Much Bandwidth Does 4K Streaming Really Require?

隨住 4K 電視喺香港越來越普及，好多人都想知自己嘅寬頻夠唔夠用嚟睇 4K 串流內容。答案取決於你用邊個串流平台、同時有幾多個人喺睇、以及有冇 HDR 等進階畫質功能。呢篇文章會逐一拆解，幫你計算出屋企實際需要嘅頻寬。

As 4K TVs become increasingly common in Hong Kong households, many people wonder whether their broadband is adequate for 4K streaming content. The answer depends on which streaming platform you use, how many people are watching simultaneously, and whether advanced picture quality features like HDR are enabled. This article breaks it all down to help you calculate your household's actual bandwidth needs.

各大串流平台頻寬需求 | Bandwidth Requirements by Platform

每個串流平台使用唔同嘅壓縮技術同編碼標準，所以佢哋嘅頻寬需求各有不同。以下係各主要平台喺唔同解像度下嘅頻寬需求：

Each streaming platform uses different compression technologies and encoding standards, resulting in varying bandwidth requirements. Here are the bandwidth needs of major platforms at different resolutions:

Netflix

Netflix 係全球最多人用嘅串流平台之一，佢哋嘅頻寬建議如下：SD（480p）需要 1Mbps，HD（720p）需要 3Mbps，Full HD（1080p）需要 5Mbps，而 4K Ultra HD 需要 15-25Mbps。Netflix 官方建議穩定 25Mbps 嘅連接速度先至可以順暢觀看 4K 內容。如果你嘅寬頻速度時快時慢，Netflix 會自動降低解像度嚟避免 Buffering。要享受 4K，你仲需要訂閱 Premium 計劃。

Netflix is one of the world's most popular streaming platforms. Their bandwidth recommendations are: SD (480p) requires 1Mbps, HD (720p) requires 3Mbps, Full HD (1080p) requires 5Mbps, and 4K Ultra HD requires 15-25Mbps. Netflix officially recommends a stable 25Mbps connection for smooth 4K viewing. If your broadband speed fluctuates, Netflix automatically lowers the resolution to prevent buffering. You also need a Premium subscription to access 4K content.

Disney+

Disney+ 嘅 4K 內容包括 Marvel、Star Wars、Pixar 等大片，全部都可以用 4K HDR 觀看。Disney+ 建議 4K 串流嘅最低速度為 25Mbps，同 Netflix 相若。不過 Disney+ 嘅實際平均比特率通常喺 16-20Mbps 左右，略低於 Netflix。HD 內容需要約 5Mbps。

Disney+ offers 4K content spanning Marvel, Star Wars, Pixar and more, all available in 4K HDR. Disney+ recommends a minimum of 25Mbps for 4K streaming, similar to Netflix. However, its actual average bitrate typically ranges from 16-20Mbps, slightly lower than Netflix. HD content requires approximately 5Mbps.

YouTube

YouTube 係最多免費 4K 內容嘅平台。4K（2160p）串流建議頻寬為 20Mbps，而 4K HDR 或 60fps 嘅內容可能需要高達 35-40Mbps。YouTube 使用自家嘅 VP9 同 AV1 編碼技術，壓縮效率比較高，但 4K 60fps 嘅 HDR 內容仍然需要唔少頻寬。1080p 內容通常需要 5-8Mbps。留意 YouTube Premium 唔係 4K 嘅必要條件 -- 4K 影片免費用戶都可以睇。

YouTube has the most free 4K content of any platform. 4K (2160p) streaming recommends 20Mbps bandwidth, while 4K HDR or 60fps content may require up to 35-40Mbps. YouTube uses its own VP9 and AV1 codecs which offer good compression efficiency, but 4K 60fps HDR content still demands substantial bandwidth. 1080p content typically needs 5-8Mbps. Note that YouTube Premium is not required for 4K -- free users can watch 4K videos too.

Apple TV+

Apple TV+ 以高畫質見稱，佢哋嘅 4K Dolby Vision 內容比特率通常係各平台中最高嘅，大約 29-40Mbps。Apple 建議至少 25Mbps 嘅穩定連接用於 4K 串流。如果你特別追求影像質素，Apple TV+ 喺同等頻寬下通常會提供最清晰嘅畫面。

Apple TV+ is known for exceptional picture quality, with 4K Dolby Vision content typically having the highest bitrate among all platforms, approximately 29-40Mbps. Apple recommends a stable 25Mbps connection for 4K streaming. If you prioritise visual quality, Apple TV+ generally delivers the sharpest picture at comparable bandwidth levels.

HDR 同 Dolby Vision 嘅額外頻寬 | Extra Bandwidth for HDR and Dolby Vision

HDR（High Dynamic Range）同 Dolby Vision 可以顯著提升畫面質素，帶來更廣嘅色域同更高嘅對比度。但呢啲額外嘅畫質資訊需要更多頻寬嚟傳輸。一般嚟講，HDR10 內容比 SDR 多用約 10-20% 嘅頻寬，而 Dolby Vision 由於使用動態元數據（Dynamic Metadata），可能需要再額外 5-10%。

HDR (High Dynamic Range) and Dolby Vision significantly enhance picture quality with wider colour gamuts and higher contrast ratios. However, this extra visual information requires additional bandwidth. Generally, HDR10 content uses roughly 10-20% more bandwidth than SDR, and Dolby Vision, which employs dynamic metadata, may require an additional 5-10% on top of that.

實際影響嚟講，如果一條 4K SDR 串流需要 20Mbps，同一內容嘅 4K HDR 版本可能需要 22-25Mbps，而 4K Dolby Vision 版本可能達到 25-30Mbps。呢個差距喺單一串流時未必太明顯，但如果屋企有幾個人同時睇 4K HDR 內容，累積起嚟嘅頻寬需求就會好可觀。

In practical terms, if a 4K SDR stream requires 20Mbps, the 4K HDR version of the same content might need 22-25Mbps, while the 4K Dolby Vision version could reach 25-30Mbps. This difference may seem modest for a single stream, but when multiple household members watch 4K HDR content simultaneously, the cumulative bandwidth demand becomes substantial.

多裝置同時串流計算 | Calculating Multiple Simultaneous Streams

呢個係大部分香港家庭最需要了解嘅部分。現代家庭通常唔會只有一個人喺用網 -- 爸爸可能喺客廳睇 Netflix 4K，媽媽喺房間睇 YouTube，細路喺平板電腦睇 Disney+，仲有人喺用手機 Instagram。每個活動都會消耗頻寬，而你需要嘅總頻寬就係所有活動嘅加總，再預留一定嘅 Buffer。

This is the section most relevant to Hong Kong households. Modern families rarely have just one person using the internet at a time -- Dad might be watching Netflix 4K in the living room, Mum streaming YouTube in the bedroom, the kids watching Disney+ on a tablet, and someone scrolling Instagram on their phone. Each activity consumes bandwidth, and your total requirement is the sum of all activities, plus a comfortable buffer.

以上計算係理論最低值。實際上，我哋建議選擇比計算結果高 50-100% 嘅計劃，因為：（1）串流服務偶爾會有頻寬突增；（2）你未必時刻監察到所有裝置嘅使用情況；（3）背景更新、雲端備份等活動都會消耗頻寬。所以即使理論上 100Mbps 夠用，我哋都建議至少選 200-300Mbps 嘅計劃。

The calculations above represent theoretical minimums. In practice, we recommend choosing a plan 50-100% above the calculated figure because: (1) streaming services occasionally experience bandwidth spikes; (2) you cannot always monitor every device's usage; (3) background updates, cloud backups and other activities consume bandwidth too. So even if 100Mbps seems theoretically sufficient, we recommend at least a 200-300Mbps plan.

唔同家庭嘅推薦寬頻計劃 | Recommended Plans by Household Size

以上月費僅供參考，實際價錢視乎地區、合約期同 ISP 而定。好消息係香港嘅光纖寬頻價錢相對全球嚟講好有競爭力，1000M 計劃一般月費只需 $158-$228，比好多國家平好多。

The monthly costs above are for reference only; actual prices vary by location, contract length and ISP. The good news is that Hong Kong's fibre broadband pricing is very competitive globally. A 1000M plan typically costs just HK$158-228 per month, significantly less than many other countries.

Smart TV vs 串流裝置 | Smart TV vs Streaming Devices

你用咩裝置嚟睇串流，其實會影響頻寬使用同畫質表現。Smart TV 內建嘅串流 App 未必係最新版本，解碼能力亦可能有限。相反，獨立嘅串流裝置（例如 Apple TV 4K、Chromecast with Google TV 4K、Amazon Fire TV Stick 4K）通常有更強嘅處理器、支援更新嘅解碼標準，而且 App 更新更頻繁。

The device you use for streaming can affect both bandwidth usage and picture quality. Smart TV built-in streaming apps may not be the latest version, and their decoding capabilities might be limited. Standalone streaming devices (such as Apple TV 4K, Chromecast with Google TV 4K, Amazon Fire TV Stick 4K) typically feature more powerful processors, support newer codec standards, and receive more frequent app updates.

更重要嘅係，部分舊款 Smart TV 可能唔支援最新嘅壓縮編碼（例如 AV1），呢個會導致佢哋需要更多頻寬先至可以達到同樣嘅畫質。如果你嘅電視係 2019 年之前買嘅，考慮加一個外置串流裝置可能會更加慳頻寬同提升體驗。Apple TV 4K 支援 AV1 解碼，可以喺更低嘅頻寬下提供同等甚至更好嘅 4K 畫質。

More importantly, some older Smart TVs may not support the latest compression codecs (such as AV1), which means they need more bandwidth to achieve the same picture quality. If your TV was purchased before 2019, adding an external streaming device could actually save bandwidth and improve your experience. The Apple TV 4K supports AV1 decoding, delivering equal or better 4K quality at lower bandwidth.

Buffering 嘅原因同解決方法 | Causes and Fixes for Buffering

Buffering（緩衝 / 轉圈圈）係串流體驗最令人煩躁嘅問題。以下係最常見嘅原因同解決方法：

Buffering -- that frustrating spinning wheel -- is the bane of any streaming experience. Here are the most common causes and their solutions:

喺所有解決方法中，最立竿見影嘅通常係用 LAN 線直接將串流裝置或 Smart TV 連接到路由器。即使係一條平價嘅 Cat 5e LAN 線，都可以提供比 Wi-Fi 更穩定嘅連接，大幅減少 Buffering 嘅機會。

Among all solutions, the most immediately effective is usually connecting your streaming device or Smart TV directly to the router via an Ethernet cable. Even an affordable Cat 5e cable provides a more stable connection than Wi-Fi and dramatically reduces buffering.

IPTV vs OTT 串流比較 | IPTV vs OTT Streaming Comparison

喺香港，你可以透過兩種主要方式收睇電視內容：IPTV 同 OTT（Over-The-Top）串流。了解佢哋嘅分別有助你揀選最合適嘅方案。

In Hong Kong, you can access TV content through two main methods: IPTV and OTT (Over-The-Top) streaming. Understanding their differences helps you choose the most suitable option.

IPTV（例如 PCCW 嘅 Now TV）：透過 ISP 嘅專用網絡傳送，唔會同你嘅一般上網流量爭頻寬。畫質同穩定性通常較好，但受限於特定 ISP，而且需要專用機頂盒。IPTV 嘅頻寬喺你嘅寬頻計劃之外額外提供，所以唔會影響你嘅上網速度。

IPTV (e.g., PCCW's Now TV): Delivered through the ISP's dedicated network, it does not compete with your regular internet traffic for bandwidth. Picture quality and stability are generally superior, but it is tied to a specific ISP and requires a dedicated set-top box. IPTV bandwidth is provided separately from your broadband plan, so it does not affect your internet speed.

OTT 串流（例如 Netflix、Disney+、myTV SUPER、Viu）：透過公共互聯網傳送，任何 ISP 嘅用戶都可以使用。靈活性高、選擇多、唔受合約綁定，但會消耗你嘅寬頻頻寬。畫質表現取決於你嘅寬頻速度同穩定性。

OTT Streaming (e.g., Netflix, Disney+, myTV SUPER, Viu): Delivered over the public internet, accessible to users of any ISP. Highly flexible with wide selection and no ISP lock-in, but consumes your broadband bandwidth. Picture quality depends on your broadband speed and stability.

香港本地串流服務 | Hong Kong Local Streaming Services

myTV SUPER

TVB 旗下嘅 myTV SUPER 係香港最多人用嘅本地串流平台之一。提供 TVB 劇集、新聞、綜藝節目以及部分外購節目。大部分內容以 1080p 為主，部分內容支援 4K。頻寬需求相對較低，一般 10-15Mbps 已經足夠流暢觀看。基本頻道免費，進階內容需要月費約 $38-$98。對於鍾意追 TVB 劇嘅用戶嚟講，myTV SUPER 係必備嘅。

TVB's myTV SUPER is one of Hong Kong's most popular local streaming platforms. It offers TVB dramas, news, variety shows and some acquired content. Most content is available in 1080p with select titles in 4K. Bandwidth requirements are relatively modest at 10-15Mbps for smooth viewing. Basic channels are free, with premium content requiring a monthly fee of approximately HK$38-98. For fans of TVB dramas, myTV SUPER is essential.

Viu

Viu 主打韓國、日本同東南亞嘅節目內容，特別受歡迎嘅係韓劇同韓綜。提供免費廣告版同 Premium 無廣告版（月費約 $28-$48）。大部分內容以 720p-1080p 為主，頻寬需求約 5-10Mbps。Viu 嘅獨家優勢係好多韓劇會同步更新，追劇唔使等。

Viu focuses on Korean, Japanese and Southeast Asian content, with Korean dramas and variety shows being particularly popular. It offers a free ad-supported tier and a Premium ad-free tier (approximately HK$28-48 monthly). Most content is in 720p-1080p, requiring about 5-10Mbps bandwidth. Viu's key advantage is that many Korean dramas are updated simultaneously with their Korean broadcast, so you never have to wait.

Netflix HK

Netflix 香港版提供全球最大嘅串流內容庫之一，包括大量原創影集、電影、紀錄片同動畫。香港版嘅內容庫同其他地區略有不同，但仍然非常豐富。Standard 計劃支援 1080p（月費 $93），Premium 計劃支援 4K（月費 $116）。Netflix 喺香港有本地 CDN 節點，所以串流表現通常好穩定，唔太受 ISP 影響。

Netflix Hong Kong offers one of the world's largest streaming libraries, including original series, films, documentaries and anime. The Hong Kong library differs slightly from other regions but remains very comprehensive. The Standard plan supports 1080p (HK$93/month) and the Premium plan supports 4K (HK$116/month). Netflix has local CDN nodes in Hong Kong, so streaming performance is typically very stable regardless of ISP.

Data Cap 唔使擔心 | No Data Caps to Worry About

如果你之前住喺美國、澳洲或者其他有 Data Cap 嘅地方，你可能會擔心 4K 串流會用盡每月嘅數據限額。好消息：香港嘅光纖寬頻一般都冇 Data Cap。無論你用幾多數據，月費都係一樣，唔會有額外收費或限速。呢個係香港寬頻市場嘅一大優勢。

If you have previously lived in the US, Australia or other regions with data caps, you might worry about 4K streaming exhausting your monthly data allowance. Great news: Hong Kong fibre broadband plans generally have no data caps. Regardless of how much data you consume, the monthly fee stays the same with no extra charges or throttling. This is a major advantage of the Hong Kong broadband market.

作為參考，一個鐘頭嘅 4K Netflix 串流大約消耗 7GB 嘅數據。如果一家人每日睇 3 個鐘 4K 內容，每月大約會用 630GB。喺有 Data Cap 嘅國家，呢個使用量可能已經超標，但喺香港完全唔使擔心。

For reference, one hour of 4K Netflix streaming consumes approximately 7GB of data. If a household watches 3 hours of 4K content daily, that amounts to roughly 630GB per month. In countries with data caps, this usage could trigger overage charges, but in Hong Kong there is nothing to worry about.

8K 未來展望 | Future-Proofing for 8K

8K（7680 x 4320）係下一代嘅超高清標準，解像度係 4K 嘅四倍。Samsung、LG 同 Sony 都已經推出咗 8K 電視。但 8K 串流內容目前仍然非常稀少，只有 YouTube 有少量 8K 影片。8K 串流估計需要至少 80-100Mbps 嘅頻寬，而 8K HDR 可能需要 100-150Mbps。

8K (7680 x 4320) is the next-generation ultra-high-definition standard, offering four times the resolution of 4K. Samsung, LG and Sony have all released 8K TVs. However, 8K streaming content remains extremely scarce, with only a handful of 8K videos available on YouTube. 8K streaming is estimated to require at least 80-100Mbps bandwidth, with 8K HDR potentially needing 100-150Mbps.

如果你考慮為 8K 未來做準備，1000M 光纖計劃絕對夠用 -- 即使同時有多個 8K 串流，1000M 仍然有充裕嘅頻寬。但就目前嚟講，4K 仍然係主流，短期內唔需要為 8K 而特別升級寬頻。更值得關注嘅係新嘅壓縮標準（例如 AV1、VVC/H.266），呢啲技術可以喺同等頻寬下提供更高嘅畫質，將進一步減低串流嘅頻寬需求。

If you want to future-proof for 8K, a 1000M fibre plan is more than adequate -- even with multiple simultaneous 8K streams, 1000M provides ample headroom. For now though, 4K remains the mainstream standard, and there is no need to upgrade specifically for 8K in the near term. What is more worth paying attention to are new compression standards (such as AV1 and VVC/H.266), which deliver higher quality at the same bandwidth, further reducing streaming requirements.

總結：點揀最啱你嘅串流寬頻？ | Conclusion: Choosing the Right Plan for Streaming

揀選適合串流嘅寬頻計劃，最重要係計算你屋企嘅「最高同時使用量」。唔好只考慮平時嘅用量，要諗吓最忙嘅時候 -- 例如週末晚上全家人都喺睇嘢嘅情況。將所有串流同時需要嘅頻寬加起嚟，再乘以 1.5-2 倍嘅安全系數，就係你應該選擇嘅計劃速度。

When choosing a broadband plan for streaming, the most important factor is calculating your household's peak simultaneous usage. Do not just consider average usage -- think about the busiest scenario, such as a weekend evening when everyone is watching something. Add up all simultaneous streaming bandwidth needs, then multiply by 1.5-2x as a safety margin. That is the plan speed you should choose.

香港嘅光纖寬頻速度快、冇 Data Cap、價錢合理，係全球最適合串流睇片嘅地方之一。只要揀啱計劃、駁好網絡，你就可以享受到最高品質嘅 4K 串流體驗。

With fast fibre speeds, no data caps, and reasonable pricing, Hong Kong is one of the best places in the world for streaming. Choose the right plan, set up your network properly, and you can enjoy the highest quality 4K streaming experience available.